US3895757A

US3895757A - Safety tip air nozzle

Info

Publication number: US3895757A
Application number: US375202A
Authority: US
Inventors: Loreto Edward Di
Original assignee: LORETO EDWARD DI
Current assignee: LORETO EDWARD DI
Priority date: 1973-06-29
Filing date: 1973-06-29
Publication date: 1975-07-22
Anticipated expiration: 1992-07-22

Abstract

An air nozzle is disclosed having a tubular body with a plurality of radially directed poles communicating with its axially disposed bore. Coaxially around and spaced from the body is placed a sleeve shielding the radial holes. The sleeve and body are so shaped that the end of the sleeve removed from the tip or forward opening is readily swaged around the body. The other end of the sleeve is axially spaced from the forward opening so that the tip extends a substantial distance therefrom whereby if the forward opening happens to be held next to any part of a person''s body, air can readily escape through the radial holes and be diverted forward without causing damage.

Description

United States Patent [1 1 Di Loreto July 22, 1975 [54] SAFETY TIP AIR NOZZLE 626,158 7/1949 United Kingdom 239/499 [76] inventor: Edward Di Loreto, 10402 River Rd.,

Y, Calif. 90241 Primary Examiner.lohn J. Love [22] Filed: June 29 1973 Attorney, Agent, or Firm-Dominick Nardelli [2]] Appl. No.: 375,202

[57] ABSTRACT 236533623 An air nozzle is disclosed having a tubular body with a [58] Fie'ld 6 499 520 plurality of radially directed poles communicating 5 6 with its axially disposed bore. Coaxially around and spaced from the body is placed a sleeve shielding the radial holes. The sleeve and body are so shaped that [56] References cued the end of the sleeve removed from the tip or forward UNITED STATES PATENTS opening is readily swaged around the body. The other 1,735,490 11/1929 Barley 239/520 X end of the leeve is axially spaced from the forward 1,995,934 3/1935 Marigold 239/424 X opening so that the tip extends a substantial distance 2,655,219 10/1953 Ensr nmger 239/520 therefrom whereby if the forward Opening happens to g et 12 be held next to any part of a persons body, air can 3735778 5/1973 gl 239/424 X readily escape through the radial holes and be di- Y verted forward without causing damage.

FOREIGN PATENTS OR APPLICATIONS 1,408,538 7/1965 France 239/291 2 Claims, 4 Drawing Figures 2| I6 220 I? l5 PATENTEDJUL22 ms is, 8 95 757 AIIIIIIIIIII J'QQ \\\wnmm 1 SAFETYTIP AIR NozzLE FIELD OF THE INVENTION BACKGROUND OF THE INVENTIO An air nozzle must have theinherent characteristics of providing a flow of air with sufficient velocity to remove unwanted particles from a work piece, even though these particles may have substantial density. For this reason and because air is used to operate many different types of equipment in a shop, the pressure of the air supply is maintained approximately at 100 lbs. per square inch. This means if one holds his hand against the tip thereof, all the pressure is directed thereagainst which high pressure could be dangerous if applied to certain parts of a body. Therefore safety regulations have been adopted in many communities requiring that the air pressure at a sealed tip of a nozzle can be no more than, for example, 30 lbs. per square inch. Therefore, to eliminate the use of pressure regulators in the air lines and to also have available the higher pressures when needed, safety air nozzles have been adopted with radially directed holes coming out of the sides. This has the disadvantage that the air could escape radially at high velocity and this high velocity air could be directed where it is not supposed to be directed and may be dangerous.

OBJECTS OF THE INVENTION An object of this invention is to provide a safety tip air nozzle whereby air is only directed in a forward direction.

Another object is to provide a means for mounting a shielding sleeve around the radial holes formed in air nozzles.

Another object is to provide a shielding sleeve around the radial holes in an air nozzle wherein the end of the sleeve remote from the tip is bonded to the body of the nozzle.

Another object is to provide a shielding sleeve and an air nozzle body wherein the end of the sleeve is economically swaged around the body.

Another object of this invention is to provide a method for producing an economical, rugged, safety tip for an air nozzle.

These and other objects and features of advantage will become more apparent after studying the following detailed description of the preferred embodiment of my invention, together with the appended drawings.

BRIEF DESCRIPTION OF THE DRAWING ETAILE DECRIPTIQN or THE DRAWING FIG. 1 shows a safety tip air. nozzlewith my novel features. The air nozzle 11 has .abarrel 15, a piston grip 13, and a safety tip 12..Attached tothegrip 13 is a standard air supply hose 14. The grip 13 is shown held by a persons left hand while the right hand is held in way of the air stream exiting the. tip 12 to demonstrate its safety features; I

My novel tip 12 is more fully shown in FIGS. 2 and 3. The tip has a tubular body 16, having a standard male-type thread 17 formed at one end that conveniently screws into a suitable female thread 18 formed in the end of the barrel 15 of the air nozzle. The other end of the body 16 has a cylindrical section 19 wherein oppositely disposed flat surfaces 21 are formed at its end to allow a standard open-end wrench (not shown) to engage thereto to facilitate mounting and removal of the tip 12 from the barrel 15. Between the section 19 and the thread 17 is formed a collar 22. The collar 22 has a flat radially disposed surface 22a that is perpendicular to the axis of the body 16. Formed in the section 19 and spaced from the surface 220 are for example, four radially directed holes 23. Around the collar 22 and section 19 is mounted the tubular sleeve 24 having one end fixed, for example, by swaging to the collar 22. The other end of the sleeve 24 is axially spaced from the other end of the section 19, for example, approximately three-quarters of an inch or a sufficient distance so that no matter how much one pushes the tip against the hand or into any part of a persons body, an annular opening 26 formed between the sleeve 24 and section 19 cannot be sealed.

Another novel feature of my safety tip 12 is the economical method in which it can be made and assembled. The body 16 is so shaped that it can be readily machined from a round metal stock in a standard screw machine. The sleeve 24 is also shaped so that it can readily be machined from a cylindrical metal stock. The inside diameter of the sleeve 24 is slightly smaller than the diameter of the collar 22 and more than the diameter of section 19. From one end of the sleeve 24, a counter bore 26 (FIG. 4) is formed, having substantially the diameter of the collar 22 to form, for example, a slip fit. The sleeve 24 is assembled onto the body 16, as shown in FIG. 4, with the surface 22a of the collar 22 up against the shoulder formed at the bottom of the counter bore 26. The end of the sleeve 24, at the counter bore 26, is rolled or swaged so that the end rolls over the back of the collar 22 into the shape shown in FIG. 3. To facilitate the swaging operation, the collar 22 is formed with a champer or conical surface 27, for example, 45 degrees.

Having described the preferred embodiment of my invention, one skilled in the art, after studying the above description of the preferred embodiment, could devise other embodiments without departing from the spirit and scope of my invention. Therefore the invention is not limited to the described embodiment, but includes all embodiments coming within the scope of the claims.

I claim:

1. An air nozzle comprising:

a barrel having an axial passageway with threads formed on the end thereof;

a tubular body having formed at one end threads adapted to engage to threads in said barrel;

said body having at least oneradially directed hole communicating with the center passageway thereof and space between the threads thereon and the other end of said body; I

said threads onsaid-barrel being female threads;

said body being cylindrical and said threads-being male threads; 7

a cylindrical annular collar formed on said body between said threads and holes thereon; a'cylindrical sleeve having an inside diameter less than the outside diameter of said collar and more than the outside diameter of said body; said sleeve having a counterbore formed from one the other end thereof.

Claims

1. An air nozzle comprising: a barrel having an axial passageway with threads formed on the end thereof; a tubular body having formed at one end threads adapted to engage to threads in said barrel; said body having at least one radially directed hole communicating with the center passageway thereof and space between the threads thereon and the other end of said body; said threads on said barrel being female threads; said body being cylindrical and said threads being male threads; a cylindrical annular collar formed on said body between said threads and holes thereon; a cylindrical sleeve having an inside diameter less than the outside diameter of said collar and more than the outside diameter of said body; said sleeve having a counterbore formed from one end thereof wherein the diameter is of a size to slip around said collar; and means to allow the bonding of said sleeve to said collar.

2. The nozzle of claim 1 wherein: said collar has a surface on the side opposite said threads, which surface is disposed radially and a champered surface formed on the opposite side thereof; said body having axially parallel surfaces formed at the other end thereof.