US20040177462A1 - Toothbrush head - Google Patents

Toothbrush head Download PDF

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Publication number
US20040177462A1
US20040177462A1 US10/389,448 US38944803A US2004177462A1 US 20040177462 A1 US20040177462 A1 US 20040177462A1 US 38944803 A US38944803 A US 38944803A US 2004177462 A1 US2004177462 A1 US 2004177462A1
Authority
US
United States
Prior art keywords
head
toothbrush
tooth cleaning
hole
cleaning element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/389,448
Inventor
William Brown
Thomas Christman
Joseph DePuydt
Ronald Duff
Edward Mangan
Phillip Braun
Karen Claire-Zimmet
Helge Zimmet
Joanna Deng
Rudolf Majthan
Rainer Hans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gillette Co LLC filed Critical Gillette Co LLC
Priority to US10/389,448 priority Critical patent/US20040177462A1/en
Assigned to GILLETTE COMPANY, THE reassignment GILLETTE COMPANY, THE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZIMMET, HELGE, HANS, RAINER, MANGAN, EDWARD J., DENG, JOANNE Q., MAJTHAN, RUDOLF, BRAUN, PHILLIP M., BROWN, WILLIAM R., JR., CHRISTMAN, THOMAS A., CLAIRE-ZIMMET, KAREN, DEPUYDT, JOSEPH A., DUFF, RONALD R., JR.
Priority to CA2800956A priority patent/CA2800956C/en
Priority to IL16504104A priority patent/IL165041A0/en
Priority to PL08016865T priority patent/PL2016859T3/en
Priority to KR1020087031032A priority patent/KR101165882B1/en
Priority to CA2485445A priority patent/CA2485445C/en
Priority to DE602004017140T priority patent/DE602004017140D1/en
Priority to KR1020087031031A priority patent/KR101178689B1/en
Priority to KR1020087031030A priority patent/KR101086986B1/en
Priority to CA2623341A priority patent/CA2623341C/en
Priority to KR1020047018118A priority patent/KR101121279B1/en
Priority to EP08016865.1A priority patent/EP2016859B1/en
Priority to CA002621875A priority patent/CA2621875A1/en
Priority to AU2004222373A priority patent/AU2004222373B2/en
Priority to EP08016866.9A priority patent/EP2016860B1/en
Priority to ES08016865.1T priority patent/ES2556133T3/en
Priority to JP2006506950A priority patent/JP2006520238A/en
Priority to ES08016866.9T priority patent/ES2556134T3/en
Priority to RU2008149977/12A priority patent/RU2391034C1/en
Priority to CN2004800002995A priority patent/CN1893854B/en
Priority to CN200810178300.3A priority patent/CN101406415B/en
Priority to AT04718812T priority patent/ATE410935T1/en
Priority to CN200810178101.2A priority patent/CN101406413B/en
Priority to PL08016866T priority patent/PL2016860T3/en
Priority to CN2010101939610A priority patent/CN101849859B/en
Priority to PL04718812T priority patent/PL1603426T3/en
Priority to CA2621102A priority patent/CA2621102C/en
Priority to CA2703167A priority patent/CA2703167A1/en
Priority to CN200810178299.4A priority patent/CN101406414B/en
Priority to PL08016864T priority patent/PL2016858T3/en
Priority to DK04718812T priority patent/DK1603426T3/en
Priority to CA2622802A priority patent/CA2622802C/en
Priority to EP08016868.5A priority patent/EP2016862B1/en
Priority to ES04718812T priority patent/ES2314385T3/en
Priority to CN200810178298XA priority patent/CN101406345B/en
Priority to ES08016867.7T priority patent/ES2593080T3/en
Priority to MXPA04011102A priority patent/MXPA04011102A/en
Priority to KR1020087031029A priority patent/KR101178621B1/en
Priority to EP08016864.4A priority patent/EP2016858B1/en
Priority to PL08016868T priority patent/PL2016862T3/en
Priority to KR1020087031033A priority patent/KR101178654B1/en
Priority to EP08016869.3A priority patent/EP2016863B1/en
Priority to EP08016867.7A priority patent/EP2016861B1/en
Priority to BRPI0403954-8B1A priority patent/BRPI0403954B1/en
Priority to CA2621409A priority patent/CA2621409C/en
Priority to RU2004133332/12A priority patent/RU2359593C2/en
Priority to CN2008101781031A priority patent/CN101406346B/en
Priority to ES08016868.5T priority patent/ES2554373T3/en
Priority to CA2781760A priority patent/CA2781760C/en
Priority to PCT/US2004/007028 priority patent/WO2004082428A2/en
Priority to CA2621100A priority patent/CA2621100C/en
Priority to PL08016867.7T priority patent/PL2016861T3/en
Priority to ES08016864.4T priority patent/ES2556132T3/en
Priority to CN2008101781027A priority patent/CN101406344B/en
Priority to EP04718812A priority patent/EP1603426B1/en
Priority to US10/830,693 priority patent/US20060272112A9/en
Publication of US20040177462A1 publication Critical patent/US20040177462A1/en
Priority to ZA200408964A priority patent/ZA200408964B/en
Assigned to GILLETTE COMPANY, THE reassignment GILLETTE COMPANY, THE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRAUN, PHILLIP M., CHENVAINU, ALEXANDER T.
Priority to JP2007054703A priority patent/JP2007175525A/en
Priority to JP2007054715A priority patent/JP2007175526A/en
Priority to US11/799,733 priority patent/US20080060155A1/en
Priority to US11/825,387 priority patent/US7975344B2/en
Priority to US12/186,639 priority patent/US20090172900A1/en
Priority to RU2008149972/12A priority patent/RU2405400C2/en
Priority to RU2008149974/12A priority patent/RU2422069C2/en
Priority to RU2008149973/12A priority patent/RU2422070C2/en
Priority to RU2008149970/12A priority patent/RU2405399C2/en
Priority to HK09105205.1A priority patent/HK1126367A1/en
Priority to HK09105206.0A priority patent/HK1126368A1/en
Priority to HK09105203.3A priority patent/HK1126365A1/en
Priority to HK09105207.9A priority patent/HK1126369A1/en
Priority to HK09105204.2A priority patent/HK1126366A1/en
Priority to HK11102844.1A priority patent/HK1148661A1/en
Priority to US13/154,644 priority patent/US8528148B2/en
Priority to US14/053,705 priority patent/US9220335B2/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/16—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by wires or other anchoring means, specially for U-shaped bristle tufts
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
    • A46B5/0025—Brushes with elastically deformable heads that change shape during use
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/06—Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/025—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups the bristles or the tufts being arranged in an angled position relative to each other
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3481—Vibrating brush body, e.g. by using eccentric weights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/08—Supports or guides for bristles
    • A46B9/12—Non-adjustable supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/42—Brushes
    • B29L2031/425—Toothbrush

Definitions

  • the invention relates generally to the field of oral care, and in particular to toothbrushes. More specifically, the invention relates to a toothbrush head having one or more pivoting tufts of bristles, the head having two portions that can move independent of each other.
  • a Japanese patent document having an application number of 3-312978 discloses a toothbrush having a multiplicity of tufts of nylon bristles.
  • a plurality of cylindrical recessed sections in the head are set orthogonally to the longitudinal axial direction of a shank and are formed at equal intervals.
  • Column-shaped rotary bodies 5 are respectively contained in the recessed sections.
  • projected strip sections 5 a are formed, and they are set in a state that they are positioned at the opening sections of the recessed sections.
  • contact surfaces to be positioned on both the sides are formed.
  • nylon bristles 6 are arranged to be vertically erected.
  • FIGS. 4, 5 and 6 disclose a second embodiment in which each tuft of bristles is secured to the head by a ball and socket type arrangement. While this embodiment allows each tuft of bristles to swivel independent of the other tufts, it does have disadvantages. If a tuft of bristles is tilted out towards the side of the head and that tuft is positioned near the interface between the side and top surfaces of the teeth, chances are increased that the bristle tips will not even be in contact with the teeth during brushing. Further, the random orientation in which the tufts can end up after brushing detracts from the attractiveness of the brush.
  • the brush head is made of a unitary structure. As such, water cannot flow through any central portion of the brush head, thereby inhibiting the cleanability of the brush. Further, the unitary head structure does not allow different portions of the head to move independently of each other. Accordingly, the bristle tufts extending from the tuft cannot accommodate the varying tooth surfaces as well as a brush in which the head has two or more portions that can move or flex independent of each other.
  • a toothbrush head has a tooth cleaning element extending from the head.
  • the head is divided into at least two portions which can be moved independent of each other.
  • the tooth cleaning element is rotatable relative to that portion of the head from which it extends.
  • a tooth cleaning element includes one or more tooth cleaners, a base support, and an anchor pivot. One end of the one or more tooth cleaners is secured to a first end of the base support. One end of the anchor pivot is secured to a second end of the base support.
  • the anchor portion has a larger section further from the base support than a smaller section of the anchor portion.
  • a method of making a toothbrush head includes molding a plastic toothbrush head in a mold.
  • the head has two distinct portions which are spaced a predetermined distance from each other.
  • the head is removed from the mold. At least that part of the head where the two head portions connect is heated.
  • the two head portions are moved towards each other.
  • At least that part of the head where the two head portions connect is cooled such that the two head portions will now remain in positions where they will be spaced apart a distance which is less than the predetermined distance.
  • a method of making a toothbrush head includes molding a plastic toothbrush head in a mold.
  • the head has at least one hole therein which extends all the way through the head.
  • the head is removed from the mold.
  • a tooth cleaning element is inserted into the hole
  • FIG. 1 is a perspective view of the toothbrush head of FIG. 1;
  • FIG. 2 is a top view of the head of FIG. 1;
  • FIG. 3 is a side view of the head of FIG. 1;
  • FIG. 4 is a bottom view of the head of FIG. 1;
  • FIG. 5 is a side view of the head of FIG. 1 showing one of the head portions flexing
  • FIG. 6 is a top view of the head of FIG. 1 with the two head portions separated from each other;
  • FIG. 7 is a top view of the head of FIG. 1 after the head portions have been positioned closer to each other;
  • FIG. 8 is a front view of a pivoting tuft taken along the lines 8 - 8 of FIG. 13;
  • FIG. 9 is a side view of the pivoting tuft of FIG. 8 taken along lines 9 - 9 ;
  • FIG. 10 is a top view of one of the holes in the head for receiving the pivoting tuft (see FIG. 6);
  • FIG. 11 is a sectional view of FIG. 10 taken along lines 11 - 11 ;
  • FIG. 12 is a sectional view of FIG. 10 taken along lines 12 - 12 ;
  • FIG. 13 is a side view of the head of FIG. 1 (a portion is removed to facilitate viewing) and a pivoting tuft prior to insertion into the head;
  • FIG. 14 is a side view of the head of FIG. 1 (a portion is removed to facilitate viewing) and a pivoting tuft after insertion into the head;
  • FIG. 15 is a side view of the pivoting tuft showing its motion
  • FIGS. 16 A-C are sectional views of FIG. 15 taken along the lines 16 A-C- 16 A-C;
  • FIG. 17 is a perspective view of a tooth cleaner in the form of a ribbed fin.
  • FIG. 18 is a side view of the ribbed fin of FIG. 17.
  • FIGS. 1-5 there is shown a toothbrush head 16 which extends from a neck 14 which extends from a handle (not shown) to form a toothbrush.
  • the type of handle is not germane to the present invention.
  • the head and handle are preferably made of polypropylene.
  • the head has a serpentine split 18 which divides the head into two portions 20 and 22 .
  • An end of the split 13 near neck 14 is preferably circular in shape (see FIG. 2).
  • the split in the head allows portions 20 and 22 to flex or move independent of each other during use of the toothbrush, thus facilitating cleaning of the teeth.
  • Split 18 can also be defined as an opening in the head between head portions 20 and 22 . This opening allows water to flow through the head, thereby enhancing cleaning of the top head surface which typically gets caked with toothpaste in spite of efforts to rinse the head clean.
  • Head portion 20 includes a projecting part 24 which fits (at least partially) into a recess 26 (see FIG. 6) defined by portion 22 .
  • Projecting part 24 has several tufts of bristles extending from it (to be described in further detail below) and is surrounded on three sides by head portion 22 .
  • a first pair of tufts 28 are located towards the free end of the head, one on each head portion 20 , 22 .
  • Each tuft has bristles (tooth cleaners) which preferably are each made of polybutylene-terepthalate (PBT) and have a diameter of 0.007 inches.
  • the shortest bristles in tuft 28 have a length of 0.420 inches with the remaining bristles increasing in length steadily to a tip of the tuft.
  • Each tuft tilts away from the handle by an angle of preferably about 12 degrees relative to that portion of the surface of the head from which it projects. As shown in FIG. 2, tufts 28 have a larger cross-section than any other tuft on the head.
  • a second group of tufts are pivoting tufts 30 (the only tufts on the head which are rotatable). There are four tufts 30 on each head portion 20 , 22 which are located towards the outside of the head. Each tuft 30 can pivot up to about 15 degrees to either side of a vertical position on the head, more preferably being able to pivot up to about 8 degrees to either side of a vertical position on the head. The pivoting of tufts 30 is roughly towards or away from neck 14 .
  • Each tuft 30 includes a base support 32 made of polypropylene.
  • the bristles are made of polyamid 6.12, have a diameter of 0.008 inches and extend 0.420 inches above the base support.
  • a third group of tufts 34 extend perpendicular to the head. There are four tufts 34 on each head portion 20 , 22 which alternate with tufts 30 . When viewed from the top (FIG. 2) the tufts are oval in shape (similar to tufts 30 but larger). In other words, the tufts 34 and 30 have oval shaped cross-sections. Each tuft 34 has bristles which are made of polyamid 6.12, have a diameter of 0.006 inches and extend above the head by about 0.385 inches.
  • a fourth group of tufts 36 are located towards the inside of the head. There are two such tufts on each head portion 20 , 22 . Each tuft 36 extends perpendicular to the head. The bristles of tuft 36 have a diameter of 0.006 inches, are made of polyamid 6.12 and rise about 0.360 inches above the head.
  • a fifth and final group of tufts 38 are also located towards the inside of the head (away from a perimeter 21 of the head). There are 4 pairs of tufts 38 . In each pair one tuft is closer to neck 14 than the other tuft. In each pair of tufts 38 , (a) a base of one tuft is closer to a first side of the head and this one tuft leans towards a second side of the head, and (b) a base of the other tuft is closer to the second side of the head and this other tuft leans towards the first side of the head. As such, the tufts in each pair lean across each other. The angle of tilt towards the side of the head is about five degrees.
  • Each tuft 38 bristles which are made of PBT, have a bristle diameter of about 0.007 inches and extend about 0.460 inches above head 16 .
  • Each tuft 38 has an oval cross-section with a long dimension of the oval being oriented in the direction of tilt.
  • the bristles used on the head can be crimped (see U.S. Pat. No. 6,058,541) or notched (see U.S. Pat. No. 6,018,840).
  • Other types of tooth cleaners besides bristles can be used.
  • a tuft of bristles could be replaced by an elastomeric fin.
  • the toothbrush head
  • neck and handle of the toothbrush are injection molded in a mold.
  • tufts 28 , 34 , 36 and 38 are secured in the head by a hot-tufting process.
  • Hot-tufting processes are notoriously well known by those skilled in the art (see e.g. U.S. Pat. No. 4,635,313; and 6,361,120; British patent application 2,330,791; and European patent application 676,268 A1).
  • hot-tufting involves presenting ends of a multiplicity of groups of plastic filaments into a mold. Each group of filament ends inside the mold is optionally melted into a blob. Each filament group is cut to a desired length (either before or after being introduced into the mold) to form a tuft of bristles. The mold is closed and molten plastic is injected into the mold. When the plastic solidifies, it locks one end of the tufts of bristles into the head of the toothbrush.
  • head portions 20 and 22 are much wider at this point than in the heads final form (see FIG. 2).
  • head portions 20 and 22 are spaced a predetermined distance (preferably at least about 1 mm) from each other.
  • through holes 40 are created during the molding step for receiving pivoting tufts 30 at a later point in the manufacturing process. Holes 40 will be described in greater detail below.
  • heat 42 is applied to the head near the neck and to part of the neck (hereinafter the neck).
  • the heat can be applied in a number of ways including hot air, radiant heating, ultrasonic or convection (e.g. hot oil) heating.
  • the heat is shown being applied to the sides of the neck. It is preferable to apply the heat to the top and bottom surface of the neck.
  • the heat brings the plastic up to 1.0-1.12 times its glass transition temperature (when temperatures are measured in the Kelvin scale).
  • the plastic should not be heated above 1.12 times its glass transition temperature in order to avoid damaging the plastic. More preferably, the plastic is heated to about 1.03-1.06 times its glass transition temperature (measured in degrees Kelvin).
  • the glass transition temperature for polypropylene is about 100 degrees centigrade whereas the glass transition temperature for copolyester and polyurethane is about 65 degrees centigrade.
  • Pressure 44 is then applied to head portions 20 , 22 to move the portions towards each other.
  • head portions 20 , 22 are in the position shown in FIG. 2, the heated portion of the head/neck is cooled by, for example, exposing the heated portion to a cold gas or liquid. If room temperature air is used to cool the neck, such air should be applied for about 20-25 seconds. This has the effect of forming the two head portions into their final positions.
  • the highest temperature heat source which will not damage the plastic should be used. If too hot a heat source is used and/or if the heat is applied for too long, the plastic can be damaged. If the heat source is not hot enough, the process will take too long and/or head portions 20 , 22 will not remain in their final desired positions. If the head/neck are made of polypropylene and hot air is used to heat the neck, (a) the heated air should be at a temperature of about 170 degrees centigrade and should be applied to the neck for about 70 seconds, (b) the polypropylene should be raised to a temperature of about 140 degrees centigrade, and (c) a nozzle which applies the hot air to the neck should be about 10 mm from the neck.
  • copolyester or polyurethane is used as the material for the head neck, (a) the heated air should be at a temperature of 250 degrees centigrade and should be applied to the neck for about 10 seconds, (b) the material should be raised to a temperature of preferably 95-100 degrees centigrade, and (c) a nozzle which applies the hot air to the neck should be about 15-20 mm from the neck.
  • each pivoting tuft 30 has a multiplicity of bristles 46 , a base support 48 and an anchor pivot 50 .
  • the bristles are secured to and extend from a first end 52 of the base support while a first end 54 of the anchor pivot extends from a second end 56 of the base support.
  • the base support and anchor pivot are preferably a unitary structure made of the same material.
  • Anchor pivot 50 includes a first portion 58 near the first end 54 and a second portion 60 near a second end 62 of the anchor pivot.
  • First portion 58 is smaller in an X an Y dimension than second portion 60 .
  • Base support 48 is larger in an X and Y dimension than second portion 60 of the anchor support.
  • Second portion 60 includes a pair of lips 63 .
  • the anchor pivot defines an opening 64 therethrough.
  • Tuft 30 can also be made by a hot-tufting type process as described above. Instead of injecting plastic into the mold to form a toothbrush handle, neck and head, the plastic is injected into a mold to form base support 48 and anchor pivot 50 , capturing bristles 46 when the injected plastic cools.
  • Each hole 40 extends from a top surface 66 of the brush head through a bottom surface 68 .
  • Hole 40 includes first and second portions 70 and 72 .
  • Portion 72 is substantially a parallelepiped except that some of its lower section is rounded off (see FIG. 11).
  • Portion 70 is also substantially a parallelepiped except that two of its sides are flared to the sides by about 15 degrees (see FIG. 12).
  • Hole portion 72 is longer in a dimension A than hole portion 70 (FIG. 11).
  • Hole portion 70 has about the same width in a dimension B as hole portion 72 where hole portions 70 and 72 meet (FIG. 12).
  • Dimensions A and B are substantially perpendicular to each other in this embodiment.
  • a pair of lips 73 are defined by this arrangement.
  • FIGS. 13-16 the insertion of pivoting tufts 30 into holes 40 will be described.
  • a tuft 30 is positioned over a hole 40 with end 62 of anchor pivot 50 facing the hole (FIG. 13).
  • tuft 30 is moved towards hole 40 until end 62 starts to enter the hole (FIG. 16A).
  • Tuft 30 is then pressed into the hole causing sides of hole portion 70 to squeeze second portion 60 of the anchor pivot.
  • anchor pivot 50 collapses causing opening 64 to become temporarily smaller.
  • Tuft 30 is then pushed all the way into hole 40 (FIG. 16C) at which point the resilient plastic anchor pivot springs back to its form shown in FIG. 16A.
  • This paragraph describes a snap-fit retention of tuft 30 to the head.
  • base support 48 is longer in the A dimension than hole portion 70 and thus prevents tuft 30 from being pressed further into hole 40 .
  • Second portion 60 is also longer in the A dimension than hole portion 70 and so prevents tuft 30 from moving back out of hole 40 . This is due to the fact that lips 63 (FIG. 8) engage lips 73 (FIG. 11). This arrangement also prevents tuft 30 from rotating about the long axis of the bristles.
  • tuft 30 pivots when it is engaged by, for example, portions of the oral cavity during brushing.
  • each tuft 30 can pivot up to about 15 degrees to either side of a position perpendicular to surface 66 .
  • FIGS. 17 and 18 another type of tooth cleaning element in the form of a fin 80 is disclosed.
  • Each fin is supported by a base support 48 and an anchor pivot 50 (both not shown) as described above, allowing the fin to pivot on the brush head.
  • a fin can be securely affixed to the head so that it does not pivot.
  • the fin is created of a thermoplastic elastomer (TPE) by an injection molding process.
  • TPE thermoplastic elastomer
  • a textured surface is provided by a series of ribs 82 . These ribs enhance cleaning of the oral cavity.
  • the ribs are formed by injection molding a TPE over the fin.
  • the ribs are preferably softer than the fin.
  • Alternative textured surfaces e.g. dimples
  • the fin has a width of preferably about 0.030 inches.
  • the long dimension of the fin above the base support is preferably 0.420 inches.
  • a tip 84 of fin 80 has a width of preferably 0.007 inches.
  • the distance from the base of the ribs to tip 84 is about 0.168 inches whereas the distance from the top of the ribs to the tip is about 0.079 inches.
  • the top of the ribs have a width of about 0.035 inches.
  • the ribs (textured surface) preferably extend about 2-12 mil away from said fin.

Abstract

A toothbrush head has a tooth cleaning element extending from the head. The head is divided into at least two portions which can be moved independent of each other. The tooth cleaning element is rotatable relative to that portion of the head from which it extends.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • Cross-reference is made to U.S. patent application Ser. No. 09/526,679 filed on Mar. 16, 2000 and Ser. No. 09/576,590 filed on May 22, 2000, both of which are assigned to Gillette Canada Company.[0001]
    • FIELD OF THE INVENTION
  • The invention relates generally to the field of oral care, and in particular to toothbrushes. More specifically, the invention relates to a toothbrush head having one or more pivoting tufts of bristles, the head having two portions that can move independent of each other. [0002]
    • BACKGROUND OF THE INVENTION
  • A Japanese patent document having an application number of 3-312978 discloses a toothbrush having a multiplicity of tufts of nylon bristles. In a first embodiment shown in FIGS. 1, 2 and [0003] 3, a plurality of cylindrical recessed sections in the head are set orthogonally to the longitudinal axial direction of a shank and are formed at equal intervals. Column-shaped rotary bodies 5 are respectively contained in the recessed sections. On the peripheral surfaces of the rotary bodies 5, along the axial direction, projected strip sections 5 a are formed, and they are set in a state that they are positioned at the opening sections of the recessed sections. At the opening sections of the recessed sections, contact surfaces to be positioned on both the sides are formed. At both the ends of the upper surfaces of the projected strip sections 5 a, nylon bristles 6 are arranged to be vertically erected.
  • As shown in FIG. 3, the arrangement described above allows bristles [0004] 6 to rotate during use of the brush. A problem with this brush is that two tufts of bristles are secured to each strip section 5 a and thus must rotate in unison. As a result, an individual tuft of bristles cannot rotate independently of its “partner” tuft. The individual tuft may thus be prevented from achieving optimal penetration between two teeth during brushing because the partner tuft might contact the teeth in a different manner and interfere with rotation of the individual tuft.
  • FIGS. 4, 5 and [0005] 6 disclose a second embodiment in which each tuft of bristles is secured to the head by a ball and socket type arrangement. While this embodiment allows each tuft of bristles to swivel independent of the other tufts, it does have disadvantages. If a tuft of bristles is tilted out towards the side of the head and that tuft is positioned near the interface between the side and top surfaces of the teeth, chances are increased that the bristle tips will not even be in contact with the teeth during brushing. Further, the random orientation in which the tufts can end up after brushing detracts from the attractiveness of the brush.
  • The Japanese reference also discloses that the brush head is made of a unitary structure. As such, water cannot flow through any central portion of the brush head, thereby inhibiting the cleanability of the brush. Further, the unitary head structure does not allow different portions of the head to move independently of each other. Accordingly, the bristle tufts extending from the tuft cannot accommodate the varying tooth surfaces as well as a brush in which the head has two or more portions that can move or flex independent of each other. [0006]
    • SUMMARY OF THE INVENTION
  • The present invention is directed to overcoming one or more of the problems set forth above. Briefly summarized, according to one aspect of the present invention, a toothbrush head has a tooth cleaning element extending from the head. The head is divided into at least two portions which can be moved independent of each other. The tooth cleaning element is rotatable relative to that portion of the head from which it extends. [0007]
  • According to another aspect of the invention, a tooth cleaning element includes one or more tooth cleaners, a base support, and an anchor pivot. One end of the one or more tooth cleaners is secured to a first end of the base support. One end of the anchor pivot is secured to a second end of the base support. The anchor portion has a larger section further from the base support than a smaller section of the anchor portion. [0008]
  • In accordance with a third aspect of the invention, a method of making a toothbrush head includes molding a plastic toothbrush head in a mold. The head has two distinct portions which are spaced a predetermined distance from each other. The head is removed from the mold. At least that part of the head where the two head portions connect is heated. The two head portions are moved towards each other. At least that part of the head where the two head portions connect is cooled such that the two head portions will now remain in positions where they will be spaced apart a distance which is less than the predetermined distance. [0009]
  • According to a fourth aspect of the invention, a method of making a toothbrush head includes molding a plastic toothbrush head in a mold. The head has at least one hole therein which extends all the way through the head. The head is removed from the mold. A tooth cleaning element is inserted into the hole [0010]
  • These and other aspects, objects, features and advantages of the present invention will be more clearly understood and appreciated from a review of the following detailed description of the preferred embodiments and appended claims, and by reference to the accompanying drawings.[0011]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of the toothbrush head of FIG. 1; [0012]
  • FIG. 2 is a top view of the head of FIG. 1; [0013]
  • FIG. 3 is a side view of the head of FIG. 1; [0014]
  • FIG. 4 is a bottom view of the head of FIG. 1; [0015]
  • FIG. 5 is a side view of the head of FIG. 1 showing one of the head portions flexing; [0016]
  • FIG. 6 is a top view of the head of FIG. 1 with the two head portions separated from each other; [0017]
  • FIG. 7 is a top view of the head of FIG. 1 after the head portions have been positioned closer to each other; [0018]
  • FIG. 8 is a front view of a pivoting tuft taken along the lines [0019] 8-8 of FIG. 13;
  • FIG. 9 is a side view of the pivoting tuft of FIG. 8 taken along lines [0020] 9-9;
  • FIG. 10 is a top view of one of the holes in the head for receiving the pivoting tuft (see FIG. 6); [0021]
  • FIG. 11 is a sectional view of FIG. 10 taken along lines [0022] 11-11;
  • FIG. 12 is a sectional view of FIG. 10 taken along lines [0023] 12-12;
  • FIG. 13 is a side view of the head of FIG. 1 (a portion is removed to facilitate viewing) and a pivoting tuft prior to insertion into the head; [0024]
  • FIG. 14 is a side view of the head of FIG. 1 (a portion is removed to facilitate viewing) and a pivoting tuft after insertion into the head; [0025]
  • FIG. 15 is a side view of the pivoting tuft showing its motion; [0026]
  • FIGS. [0027] 16A-C are sectional views of FIG. 15 taken along the lines 16A-C-16A-C;
  • FIG. 17 is a perspective view of a tooth cleaner in the form of a ribbed fin; and [0028]
  • FIG. 18 is a side view of the ribbed fin of FIG. 17.[0029]
    • DETAILED DESCRIPTION OF THE BEST MODE
  • Beginning with FIGS. 1-5, there is shown a [0030] toothbrush head 16 which extends from a neck 14 which extends from a handle (not shown) to form a toothbrush. The type of handle is not germane to the present invention. The head and handle are preferably made of polypropylene. The head has a serpentine split 18 which divides the head into two portions 20 and 22. An end of the split 13 near neck 14 is preferably circular in shape (see FIG. 2). As shown in FIG. 5, the split in the head allows portions 20 and 22 to flex or move independent of each other during use of the toothbrush, thus facilitating cleaning of the teeth.
  • [0031] Split 18 can also be defined as an opening in the head between head portions 20 and 22. This opening allows water to flow through the head, thereby enhancing cleaning of the top head surface which typically gets caked with toothpaste in spite of efforts to rinse the head clean.
  • [0032] Head portion 20 includes a projecting part 24 which fits (at least partially) into a recess 26 (see FIG. 6) defined by portion 22. Projecting part 24 has several tufts of bristles extending from it (to be described in further detail below) and is surrounded on three sides by head portion 22.
  • Referring now to FIGS. 2 and 3, each of the tufts of bristles on [0033] head 16 will be described. A first pair of tufts 28 are located towards the free end of the head, one on each head portion 20, 22. Each tuft has bristles (tooth cleaners) which preferably are each made of polybutylene-terepthalate (PBT) and have a diameter of 0.007 inches. The shortest bristles in tuft 28 have a length of 0.420 inches with the remaining bristles increasing in length steadily to a tip of the tuft. Each tuft tilts away from the handle by an angle of preferably about 12 degrees relative to that portion of the surface of the head from which it projects. As shown in FIG. 2, tufts 28 have a larger cross-section than any other tuft on the head.
  • A second group of tufts are pivoting tufts [0034] 30 (the only tufts on the head which are rotatable). There are four tufts 30 on each head portion 20, 22 which are located towards the outside of the head. Each tuft 30 can pivot up to about 15 degrees to either side of a vertical position on the head, more preferably being able to pivot up to about 8 degrees to either side of a vertical position on the head. The pivoting of tufts 30 is roughly towards or away from neck 14. Each tuft 30 includes a base support 32 made of polypropylene. The bristles are made of polyamid 6.12, have a diameter of 0.008 inches and extend 0.420 inches above the base support.
  • A third group of [0035] tufts 34 extend perpendicular to the head. There are four tufts 34 on each head portion 20, 22 which alternate with tufts 30. When viewed from the top (FIG. 2) the tufts are oval in shape (similar to tufts 30 but larger). In other words, the tufts 34 and 30 have oval shaped cross-sections. Each tuft 34 has bristles which are made of polyamid 6.12, have a diameter of 0.006 inches and extend above the head by about 0.385 inches.
  • A fourth group of [0036] tufts 36 are located towards the inside of the head. There are two such tufts on each head portion 20, 22. Each tuft 36 extends perpendicular to the head. The bristles of tuft 36 have a diameter of 0.006 inches, are made of polyamid 6.12 and rise about 0.360 inches above the head.
  • A fifth and final group of [0037] tufts 38 are also located towards the inside of the head (away from a perimeter 21 of the head). There are 4 pairs of tufts 38. In each pair one tuft is closer to neck 14 than the other tuft. In each pair of tufts 38, (a) a base of one tuft is closer to a first side of the head and this one tuft leans towards a second side of the head, and (b) a base of the other tuft is closer to the second side of the head and this other tuft leans towards the first side of the head. As such, the tufts in each pair lean across each other. The angle of tilt towards the side of the head is about five degrees. Each tuft 38 bristles which are made of PBT, have a bristle diameter of about 0.007 inches and extend about 0.460 inches above head 16. Each tuft 38 has an oval cross-section with a long dimension of the oval being oriented in the direction of tilt.
  • The bristles used on the head can be crimped (see U.S. Pat. No. 6,058,541) or notched (see U.S. Pat. No. 6,018,840). Other types of tooth cleaners besides bristles can be used. For example, a tuft of bristles could be replaced by an elastomeric fin. The US patents listed in this paragraph are incorporated herein by reference. [0038]
  • Turning now to FIG. 6, a description will now be provided as to how the toothbrush (head) is made. In a first step, the head, neck and handle of the toothbrush are injection molded in a mold. During this injection molding step, [0039] tufts 28, 34, 36 and 38 are secured in the head by a hot-tufting process. Hot-tufting processes are notoriously well known by those skilled in the art (see e.g. U.S. Pat. No. 4,635,313; and 6,361,120; British patent application 2,330,791; and European patent application 676,268 A1).
  • Briefly, hot-tufting involves presenting ends of a multiplicity of groups of plastic filaments into a mold. Each group of filament ends inside the mold is optionally melted into a blob. Each filament group is cut to a desired length (either before or after being introduced into the mold) to form a tuft of bristles. The mold is closed and molten plastic is injected into the mold. When the plastic solidifies, it locks one end of the tufts of bristles into the head of the toothbrush. [0040]
  • It can be seen in FIG. 6 that the [0041] opening 18 between head portions 20 and 22 is much wider at this point than in the heads final form (see FIG. 2). In other words, head portions 20 and 22 are spaced a predetermined distance (preferably at least about 1 mm) from each other. Further, through holes 40 are created during the molding step for receiving pivoting tufts 30 at a later point in the manufacturing process. Holes 40 will be described in greater detail below.
  • With reference to FIG. 7, after the toothbrush is removed from the mold, [0042] heat 42 is applied to the head near the neck and to part of the neck (hereinafter the neck). The heat can be applied in a number of ways including hot air, radiant heating, ultrasonic or convection (e.g. hot oil) heating. Here the heat is shown being applied to the sides of the neck. It is preferable to apply the heat to the top and bottom surface of the neck. The heat brings the plastic up to 1.0-1.12 times its glass transition temperature (when temperatures are measured in the Kelvin scale). The plastic should not be heated above 1.12 times its glass transition temperature in order to avoid damaging the plastic. More preferably, the plastic is heated to about 1.03-1.06 times its glass transition temperature (measured in degrees Kelvin). The glass transition temperature for polypropylene is about 100 degrees centigrade whereas the glass transition temperature for copolyester and polyurethane is about 65 degrees centigrade.
  • [0043] Pressure 44 is then applied to head portions 20, 22 to move the portions towards each other. Once head portions 20, 22 are in the position shown in FIG. 2, the heated portion of the head/neck is cooled by, for example, exposing the heated portion to a cold gas or liquid. If room temperature air is used to cool the neck, such air should be applied for about 20-25 seconds. This has the effect of forming the two head portions into their final positions.
  • In order to achieve short process times, the highest temperature heat source which will not damage the plastic should be used. If too hot a heat source is used and/or if the heat is applied for too long, the plastic can be damaged. If the heat source is not hot enough, the process will take too long and/or [0044] head portions 20, 22 will not remain in their final desired positions. If the head/neck are made of polypropylene and hot air is used to heat the neck, (a) the heated air should be at a temperature of about 170 degrees centigrade and should be applied to the neck for about 70 seconds, (b) the polypropylene should be raised to a temperature of about 140 degrees centigrade, and (c) a nozzle which applies the hot air to the neck should be about 10 mm from the neck.
  • If copolyester or polyurethane is used as the material for the head neck, (a) the heated air should be at a temperature of 250 degrees centigrade and should be applied to the neck for about 10 seconds, (b) the material should be raised to a temperature of preferably 95-100 degrees centigrade, and (c) a nozzle which applies the hot air to the neck should be about 15-20 mm from the neck. [0045]
  • Heating the respective materials above for the time indicated allows the material to be softened and mechanically bent into its final form. Exceeding the heating times above could cause the material to overheat and become damaged. [0046]
  • Turning to FIGS. 8 and 9, each pivoting [0047] tuft 30 has a multiplicity of bristles 46, a base support 48 and an anchor pivot 50. The bristles are secured to and extend from a first end 52 of the base support while a first end 54 of the anchor pivot extends from a second end 56 of the base support. The base support and anchor pivot are preferably a unitary structure made of the same material. Anchor pivot 50 includes a first portion 58 near the first end 54 and a second portion 60 near a second end 62 of the anchor pivot. First portion 58 is smaller in an X an Y dimension than second portion 60. Base support 48 is larger in an X and Y dimension than second portion 60 of the anchor support. Second portion 60 includes a pair of lips 63. The anchor pivot defines an opening 64 therethrough.
  • [0048] Tuft 30 can also be made by a hot-tufting type process as described above. Instead of injecting plastic into the mold to form a toothbrush handle, neck and head, the plastic is injected into a mold to form base support 48 and anchor pivot 50, capturing bristles 46 when the injected plastic cools.
  • With reference to FIGS. 10-12, through holes [0049] 40 (FIG. 6) will now be described. Each hole 40 extends from a top surface 66 of the brush head through a bottom surface 68. Hole 40 includes first and second portions 70 and 72. Portion 72 is substantially a parallelepiped except that some of its lower section is rounded off (see FIG. 11). Portion 70 is also substantially a parallelepiped except that two of its sides are flared to the sides by about 15 degrees (see FIG. 12). Hole portion 72 is longer in a dimension A than hole portion 70 (FIG. 11). Hole portion 70 has about the same width in a dimension B as hole portion 72 where hole portions 70 and 72 meet (FIG. 12). Dimensions A and B are substantially perpendicular to each other in this embodiment. A pair of lips 73 are defined by this arrangement.
  • Turning now to FIGS. 13-16, the insertion of pivoting [0050] tufts 30 into holes 40 will be described. A tuft 30 is positioned over a hole 40 with end 62 of anchor pivot 50 facing the hole (FIG. 13). As shown in FIGS. 16A-C, tuft 30 is moved towards hole 40 until end 62 starts to enter the hole (FIG. 16A). Tuft 30 is then pressed into the hole causing sides of hole portion 70 to squeeze second portion 60 of the anchor pivot. Accordingly, anchor pivot 50 collapses causing opening 64 to become temporarily smaller. Tuft 30 is then pushed all the way into hole 40 (FIG. 16C) at which point the resilient plastic anchor pivot springs back to its form shown in FIG. 16A. This paragraph describes a snap-fit retention of tuft 30 to the head.
  • Referring to FIG. 16C, [0051] base support 48 is longer in the A dimension than hole portion 70 and thus prevents tuft 30 from being pressed further into hole 40. Second portion 60 is also longer in the A dimension than hole portion 70 and so prevents tuft 30 from moving back out of hole 40. This is due to the fact that lips 63 (FIG. 8) engage lips 73 (FIG. 11). This arrangement also prevents tuft 30 from rotating about the long axis of the bristles.
  • As shown in FIG. 15, [0052] tuft 30 pivots when it is engaged by, for example, portions of the oral cavity during brushing. Preferably each tuft 30 can pivot up to about 15 degrees to either side of a position perpendicular to surface 66.
  • Turning to FIGS. 17 and 18, another type of tooth cleaning element in the form of a [0053] fin 80 is disclosed. Each fin is supported by a base support 48 and an anchor pivot 50 (both not shown) as described above, allowing the fin to pivot on the brush head. Alternatively, a fin can be securely affixed to the head so that it does not pivot. The fin is created of a thermoplastic elastomer (TPE) by an injection molding process. In this embodiment, a textured surface is provided by a series of ribs 82. These ribs enhance cleaning of the oral cavity. The ribs are formed by injection molding a TPE over the fin. The ribs are preferably softer than the fin. Alternative textured surfaces (e.g. dimples) can be used in place of the ribs.
  • As shown in FIG. 18, the fin has a width of preferably about 0.030 inches. The long dimension of the fin above the base support is preferably 0.420 inches. A [0054] tip 84 of fin 80 has a width of preferably 0.007 inches. The distance from the base of the ribs to tip 84 is about 0.168 inches whereas the distance from the top of the ribs to the tip is about 0.079 inches. The top of the ribs have a width of about 0.035 inches. The ribs (textured surface) preferably extend about 2-12 mil away from said fin.
  • The invention has been described with reference to a preferred embodiment. However, it will be appreciated that variations and modifications can be effected by a person of ordinary skill in the art without departing from the scope of the invention. [0055]

Claims (56)

1. A toothbrush head, comprising:
a tooth cleaning element extending from a top surface of the head, the head being divided into at least two portions which can be moved independent of each other, the tooth cleaning element being rotatable relative to that portion of the head from which it extends.
2. The toothbrush of claim 1, wherein the tooth cleaning element is a tuft of bristles.
3. The toothbrush of claim 1, wherein the tooth cleaning element is a fin made of a material selected from the group of materials consisting of plastic, rubber and combinations thereof.
4. The toothbrush of claim 1, wherein the tooth cleaning element has a range of rotation of up to about 30 degrees.
5. The toothbrush of claim 1, wherein the tooth cleaning element can rotate up to about 15 degrees to either side of a vertical position in which the element is perpendicular to a top surface of the portion of the head from which it extends.
6. The toothbrush of claim 1, further including one or more stationary tooth cleaning elements which substantially cannot be rotated.
7. The toothbrush of claim 1, wherein a portion of the head limits rotation of the tooth cleaning element.
8. The toothbrush of claim 1, wherein there is no portion of the toothbrush itself which rotates the tooth cleaning element.
9. The toothbrush of claim 1, wherein the tooth cleaning element is supported for rotation primarily about only one axis.
10. The toothbrush of claim 9, wherein the axis is substantially perpendicular to a long axis of the element.
11. The toothbrush of claim 1, wherein the tooth cleaning element is rotatable independent of any other tooth cleaning elements on the head.
12. The toothbrush of claim 1, wherein the two portions of the head define an opening in an interior portion of the head such that water can flow through this opening.
13. The toothbrush of claim 1, further comprising a second tooth cleaning element, wherein one of the two tooth cleaning elements is located on one of the two head portions, and the other of the two tooth cleaning elements is located on the other of the two head portions.
14. The toothbrush of claim 13, wherein both of the tooth cleaning elements are located on the same head portion.
15. The toothbrush of claim 1, wherein each head portion includes alternating projections and recesses, the projections of each head portion fitting at least partially into the recesses of the other head portion.
16. The toothbrush of claim 15, wherein one of the projections on one of the head portions has at least one tuft extending therefrom and is surrounded on three sides by the other head portion.
17. A tooth cleaning element, comprising:
one or more tooth cleaners;
a base support; and
an anchor pivot, one end of the one or more tooth cleaners being secured to a first end of the base support, and a first end of the anchor pivot extending from a second end of the base support, a first portion of the anchor pivot near the anchor pivot's first end being smaller than a second portion of the anchor pivot located near a second end of the anchor pivot.
18. The tooth cleaning element of claim 17, wherein the one or more tooth cleaners are one or more bristles.
19. The tooth cleaning element of claim 17, wherein the anchor pivot has an opening therethrough, such that when the anchor pivot is pressed into an entrance to a hole in the head of a toothbrush, the entrance being smaller than the second portion of the anchor portion, the opening temporarily gets smaller to allow the second portion of the anchor pivot to flex and pass through the hole entrance.
20. The toothbrush of claim 17, wherein the one or more tooth cleaners are made of polybutylene terephthalate.
21. The toothbrush of claim 17, wherein the base support and anchor pivot are a unitary structure.
22. The toothbrush of claim 1, wherein the tooth cleaning element includes one or more tooth cleaners;
a base support; and
an anchor pivot, one end of the one or more tooth cleaners being secured to a first end of the base support, and one end of the anchor pivot being secured to a second end of the base support.
23. The toothbrush of claim 22, wherein the anchor pivot has a larger section further from the base support than a smaller section of the anchor portion, the larger section and smaller section each having a length which is longer than a width.
24. The toothbrush of claim 22, wherein the anchor pivot is located in a hole which passes all the way through the head.
25. The toothbrush of claim 24, wherein the base support is located outside the hole.
26. The toothbrush of claim 24, wherein a first portion of the hole near a bottom surface of the head opposite the top surface of the head has about the same length and width as the length and width of the larger section of the anchor pivot, the larger section of the anchor pivot residing in the first hole portion.
27. The toothbrush of claim 26, wherein the hole has a second portion near the top surface of the head, the second hole portion having a length which is shorter than a length of the first hole portion.
28 The toothbrush of claim 27, the second hole portion having a width which is about the same as the width of the first hole portion where the two hole portions meet, the width of the second hole portion flaring from where the hole portions meet towards the top surface of the head.
29. The toothbrush of claim 27, wherein the tooth cleaning element rotates about an axis which is substantially parallel to the width of the second hole portion.
30. A method of making a toothbrush head, comprising the steps of:
molding a plastic toothbrush head in a mold, the head having two distinct portions which are spaced a predetermined distance from each other;
removing the head from the mold;
moving the two head portions towards each other;
heating at least that part of the head where the two head portions connect;
cooling at least that part of the head where the two head portions connect such that the two head portions will now remain in positions where they will be spaced apart a distance which is less than the predetermined distance, wherein the molding step is effective to secure a tooth cleaning element to one of the two head portions.
31. The method of claim 30, wherein the tooth cleaning element is a tuft of one or more bristles.
32. The method of claim 30, wherein the molding step is effective to secure at least one or more tooth cleaning elements to each of the two head portions.
33. The method of claim 30, wherein the molding step is effective to mold a hole into one of the two head portions, the hole extending all the way through the head portion.
34. The method of claim 33, further comprising the step of:
inserting a tooth cleaning element into the hole.
35. A method of making a toothbrush head, comprising the steps of:
molding a plastic toothbrush head in a mold, the head having at least one hole therein which extends all the way through the head;
removing the head from the mold; and
inserting a tooth cleaning element into the hole.
36. The method of claim 35, wherein the hole extends from a top surface of the head from which one or more tooth cleaning elements will project, to a bottom surface of the head opposite the top surface.
37. The method of claim 36, wherein the hole has a first portion near the top surface, and wherein the hole has a second portion near the bottom surface, the second hole portion's length being longer than its width, the length of the first hole portion being shorter than the length of the second hole portion.
38. The method of claim 35, further comprising the step of:
providing a tooth cleaning element having one or more tooth cleaners, a base support and an anchor pivot, one end of the one or more tooth cleaners being secured to a first end of the base support, and one end of the anchor pivot being secured to a second end of the base support, the anchor pivot having a larger section further from the base support than a smaller section of the anchor pivot, the larger section having a length which is longer than its width.
39. The method of claim 38, further comprising the steps of:
positioning the anchor support adjacent the first hole portion such that the length of the first hole portion is substantially parallel to the width of the larger section of the anchor pivot; and
inserting the anchor pivot into the hole such that the anchor pivot resides in the second hole portion and the base support is adjacent to the top surface.
40. The toothbrush of claim 1, wherein the tooth cleaning element is snap-fit to the head.
42. A toothbrush, comprising:
a head; and
a pair of tufts extending from an end of the head furthest from a handle from which the head extends, both tufts tilting away from the handle, wherein each tuft has a larger cross-section than any other tuft on the head.
43. The toothbrush of claim 42, wherein the tufts are tilted by about 12 degrees.
44. A toothbrush, comprising:
a head; and
a pair of tufts extending from said head, a first one of the tufts being closer to a neck from which the head extends than a second one of the tufts, a base of the first tuft being closer to a first side of the head, the first tuft being tilted towards a second side of the head, a base of the second tuft being closer to the second side of the head, the second tuft being tilted towards the first side of the head, each tuft having an oval cross-section.
45. The toothbrush of claim 44, wherein a long dimension of the oval cross-section for each tuft is oriented towards the direction of tilt.
46. The toothbrush of claim 2, wherein the bristles are crimped.
47. The toothbrush of claim 2, wherein the bristles are notched.
48. A tooth cleaning element, comprising:
a fin; and
a textured surface provided on the fin.
49. The tooth cleaning element of claim 48, wherein said textured surface includes ribs.
50. The tooth cleaning element of claim 48, wherein said textured surface includes dimples.
51. The tooth cleaning element of claim 49, wherein said textured surface extends from about 2-12 mil away from said fin.
52. The method of claim 30, wherein said heating step is effective to heat the head part to about 1.00-1.12 times the plastic's glass transition temperature.
53. The method of claim 30, wherein said heating step is effective to heat the head part to about 1.03-1.06 times the plastic's glass transition temperature.
54. The method of claim 30, wherein said cooling step is accomplished by blowing air onto the head part for 20-25 seconds.
55. The method of claim 30, wherein said molding step is effective to mold a split between the two distinct head portions.
56. The method of claim 55, wherein an end of said split near the part of the head that is heated has a circular shape when viewed from a top of the head.
57. The toothbrush of claim 1, wherein the tooth cleaning element can rotate up to about 8 degrees to either side of a vertical position in which the element is perpendicular to a top surface of the portion of the head from which it extends.
US10/389,448 2003-03-14 2003-03-14 Toothbrush head Abandoned US20040177462A1 (en)

Priority Applications (74)

Application Number Priority Date Filing Date Title
US10/389,448 US20040177462A1 (en) 2003-03-14 2003-03-14 Toothbrush head
CA2800956A CA2800956C (en) 2003-03-14 2004-03-09 Toothbrush head
IL16504104A IL165041A0 (en) 2003-03-14 2004-03-09 Toothbrush head
PL08016865T PL2016859T3 (en) 2003-03-14 2004-03-09 Toothbrush head
KR1020087031032A KR101165882B1 (en) 2003-03-14 2004-03-09 Toothbrush head
CA2485445A CA2485445C (en) 2003-03-14 2004-03-09 Toothbrush head
DE602004017140T DE602004017140D1 (en) 2003-03-14 2004-03-09 TOOTHBRUSH HEAD
KR1020087031031A KR101178689B1 (en) 2003-03-14 2004-03-09 Toothbrush head
KR1020087031030A KR101086986B1 (en) 2003-03-14 2004-03-09 Toothbrush head
CA2623341A CA2623341C (en) 2003-03-14 2004-03-09 Toothbrush
KR1020047018118A KR101121279B1 (en) 2003-03-14 2004-03-09 Toothbrush head
EP08016865.1A EP2016859B1 (en) 2003-03-14 2004-03-09 Toothbrush head
CA002621875A CA2621875A1 (en) 2003-03-14 2004-03-09 Toothbrush
AU2004222373A AU2004222373B2 (en) 2003-03-14 2004-03-09 Toothbrush head
EP08016866.9A EP2016860B1 (en) 2003-03-14 2004-03-09 Toothbrush head
ES08016865.1T ES2556133T3 (en) 2003-03-14 2004-03-09 Toothbrush head
JP2006506950A JP2006520238A (en) 2003-03-14 2004-03-09 Toothbrush head
ES08016866.9T ES2556134T3 (en) 2003-03-14 2004-03-09 Toothbrush head
RU2008149977/12A RU2391034C1 (en) 2003-03-14 2004-03-09 Toothbrush head
CN2004800002995A CN1893854B (en) 2003-03-14 2004-03-09 Toothbrush head and its manufacture method
CN200810178300.3A CN101406415B (en) 2003-03-14 2004-03-09 Toothbrush
AT04718812T ATE410935T1 (en) 2003-03-14 2004-03-09 TOOTHBRUSH HEAD
CN200810178101.2A CN101406413B (en) 2003-03-14 2004-03-09 Toothbrush
PL08016866T PL2016860T3 (en) 2003-03-14 2004-03-09 Toothbrush head
CN2010101939610A CN101849859B (en) 2003-03-14 2004-03-09 Toothbrush head
PL04718812T PL1603426T3 (en) 2003-03-14 2004-03-09 Toothbrush head
CA2621102A CA2621102C (en) 2003-03-14 2004-03-09 Toothbrush head comprising elastomeric elements
CA2703167A CA2703167A1 (en) 2003-03-14 2004-03-09 Toothbrush head
CN200810178299.4A CN101406414B (en) 2003-03-14 2004-03-09 Toothbrush
PL08016864T PL2016858T3 (en) 2003-03-14 2004-03-09 Toothbrush head
DK04718812T DK1603426T3 (en) 2003-03-14 2004-03-09 Toothbrush head
CA2622802A CA2622802C (en) 2003-03-14 2004-03-09 Toothbrush head
EP08016868.5A EP2016862B1 (en) 2003-03-14 2004-03-09 Toothbrush head
ES04718812T ES2314385T3 (en) 2003-03-14 2004-03-09 TOOTHBRUSH HEAD.
CN200810178298XA CN101406345B (en) 2003-03-14 2004-03-09 Teeth cleaning unit
ES08016867.7T ES2593080T3 (en) 2003-03-14 2004-03-09 Toothbrush head
MXPA04011102A MXPA04011102A (en) 2003-03-14 2004-03-09 Toothbrush head.
KR1020087031029A KR101178621B1 (en) 2003-03-14 2004-03-09 Toothbrush head
EP08016864.4A EP2016858B1 (en) 2003-03-14 2004-03-09 Toothbrush head
PL08016868T PL2016862T3 (en) 2003-03-14 2004-03-09 Toothbrush head
KR1020087031033A KR101178654B1 (en) 2003-03-14 2004-03-09 Toothbrush head
EP08016869.3A EP2016863B1 (en) 2003-03-14 2004-03-09 Toothbrush head
EP08016867.7A EP2016861B1 (en) 2003-03-14 2004-03-09 Toothbrush head
BRPI0403954-8B1A BRPI0403954B1 (en) 2003-03-14 2004-03-09 Toothbrush Head
CA2621409A CA2621409C (en) 2003-03-14 2004-03-09 Method of making a toothbrush head
RU2004133332/12A RU2359593C2 (en) 2003-03-14 2004-03-09 Head of tooth brush
CN2008101781031A CN101406346B (en) 2003-03-14 2004-03-09 Method for making teeth heads
ES08016868.5T ES2554373T3 (en) 2003-03-14 2004-03-09 Toothbrush head
CA2781760A CA2781760C (en) 2003-03-14 2004-03-09 Toothbrush head
PCT/US2004/007028 WO2004082428A2 (en) 2003-03-14 2004-03-09 Toothbrush head
CA2621100A CA2621100C (en) 2003-03-14 2004-03-09 Toothbrush head
PL08016867.7T PL2016861T3 (en) 2003-03-14 2004-03-09 Toothbrush head
ES08016864.4T ES2556132T3 (en) 2003-03-14 2004-03-09 Toothbrush head
CN2008101781027A CN101406344B (en) 2003-03-14 2004-03-09 Toothbrush
EP04718812A EP1603426B1 (en) 2003-03-14 2004-03-09 Toothbrush head
US10/830,693 US20060272112A9 (en) 2003-03-14 2004-04-23 Toothbrush
ZA200408964A ZA200408964B (en) 2003-03-14 2004-11-05 Toothbrush head
JP2007054703A JP2007175525A (en) 2003-03-14 2007-03-05 Toothbrush head
JP2007054715A JP2007175526A (en) 2003-03-14 2007-03-05 Toothbrush head
US11/799,733 US20080060155A1 (en) 2003-03-14 2007-05-02 Toothbrush head
US11/825,387 US7975344B2 (en) 2003-03-14 2007-07-06 Toothbrush head
US12/186,639 US20090172900A1 (en) 2003-03-14 2008-08-06 Toothbrush
RU2008149972/12A RU2405400C2 (en) 2003-03-14 2008-12-17 Toothbrush
RU2008149974/12A RU2422069C2 (en) 2003-03-14 2008-12-17 Toothbrush head
RU2008149973/12A RU2422070C2 (en) 2003-03-14 2008-12-17 Toothbrush head
RU2008149970/12A RU2405399C2 (en) 2003-03-14 2008-12-17 Toothbrush
HK09105205.1A HK1126367A1 (en) 2003-03-14 2009-06-10 Toothbrush head
HK09105206.0A HK1126368A1 (en) 2003-03-14 2009-06-10 Toothbrush head
HK09105203.3A HK1126365A1 (en) 2003-03-14 2009-06-10 Toothbrush head
HK09105207.9A HK1126369A1 (en) 2003-03-14 2009-06-10 Toothbrush head
HK09105204.2A HK1126366A1 (en) 2003-03-14 2009-06-10 Toothbrush head
HK11102844.1A HK1148661A1 (en) 2003-03-14 2011-03-22 Toothbrush head
US13/154,644 US8528148B2 (en) 2003-03-14 2011-06-07 Toothbrush head
US14/053,705 US9220335B2 (en) 2003-03-14 2013-10-15 Toothbrush head

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US10/830,693 Continuation US20060272112A9 (en) 2003-03-14 2004-04-23 Toothbrush
US11/799,733 Continuation US20080060155A1 (en) 2003-03-14 2007-05-02 Toothbrush head

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US10/830,693 Continuation US20060272112A9 (en) 2003-03-14 2004-04-23 Toothbrush
US11/799,733 Continuation US20080060155A1 (en) 2003-03-14 2007-05-02 Toothbrush head
US12/186,639 Continuation US20090172900A1 (en) 2003-03-14 2008-08-06 Toothbrush
US13/154,644 Continuation US8528148B2 (en) 2003-03-14 2011-06-07 Toothbrush head

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US10/389,448 Abandoned US20040177462A1 (en) 2003-03-14 2003-03-14 Toothbrush head
US11/799,733 Abandoned US20080060155A1 (en) 2003-03-14 2007-05-02 Toothbrush head
US11/825,387 Expired - Lifetime US7975344B2 (en) 2003-03-14 2007-07-06 Toothbrush head
US12/186,639 Abandoned US20090172900A1 (en) 2003-03-14 2008-08-06 Toothbrush
US13/154,644 Expired - Lifetime US8528148B2 (en) 2003-03-14 2011-06-07 Toothbrush head
US14/053,705 Expired - Fee Related US9220335B2 (en) 2003-03-14 2013-10-15 Toothbrush head

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US11/799,733 Abandoned US20080060155A1 (en) 2003-03-14 2007-05-02 Toothbrush head
US11/825,387 Expired - Lifetime US7975344B2 (en) 2003-03-14 2007-07-06 Toothbrush head
US12/186,639 Abandoned US20090172900A1 (en) 2003-03-14 2008-08-06 Toothbrush
US13/154,644 Expired - Lifetime US8528148B2 (en) 2003-03-14 2011-06-07 Toothbrush head
US14/053,705 Expired - Fee Related US9220335B2 (en) 2003-03-14 2013-10-15 Toothbrush head

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AT (1) ATE410935T1 (en)
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CA (10) CA2621875A1 (en)
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