US20060120899A1 - Reusable pump cartridge - Google Patents
Reusable pump cartridge Download PDFInfo
- Publication number
- US20060120899A1 US20060120899A1 US10/904,959 US90495904A US2006120899A1 US 20060120899 A1 US20060120899 A1 US 20060120899A1 US 90495904 A US90495904 A US 90495904A US 2006120899 A1 US2006120899 A1 US 2006120899A1
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- United States
- Prior art keywords
- pump cartridge
- fluid
- piston
- chamber
- housing
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/007—Cylinder heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3203—Fluid jet cutting instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3203—Fluid jet cutting instruments
- A61B17/32037—Fluid jet cutting instruments for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
Definitions
- the present invention relates to high pressure fluid jet tools, and in particular to a reusable pump cartridge for use with a high pressure fluid jet.
- High pressure fluid jets for cutting tissue can offer several advantages over traditional cutting tools.
- high pressure fluid jets tend to emulsify soft tissue, thus avoiding thermal damage and necrosis which can arise from using laser cutters and electrosurgical cutters.
- the emulsified tissue can also be easily transported by aspiration away from the surgical site.
- many fluid jet cutting devices include aspiration and evacuation as an integral portion of the device can be an added benefit for many surgical procedures.
- a reusable pump cartridge for use in a high pressure fluid jet system.
- the pump cartridge can be adapted to couple to a drive mechanism for driving fluid through the pump cartridge. Between uses, the pump cartridge can be disengaged from the drive mechanism, sterilized, and reused.
- the pump cartridge can have a variety of configurations
- the pump cartridge can include a housing having a chamber adapted for fluid flow therethrough, and a drive assembly disposed therein and adapted to drive fluid through the chamber when the housing is coupled to a drive mechanism.
- the chamber can be adapted to have a sealed configuration when the housing is coupled to the drive mechanism, and the chamber can be adapted to have an open configuration when the housing is disengaged from a drive mechanism to allow the pump cartridge to be sterilized.
- the chamber can include a one-way inlet valve that is adapted to allow fluid to flow into the chamber, and a one-way outlet valve that is adapted to allow fluid to flow out of the chamber.
- the inlet and outlet valves can be ball-in-aperture valves.
- the drive assembly can have a variety of configurations, but in one exemplary embodiment the drive assembly can include a piston that is movably disposed through a seal that separates the chamber from the drive assembly.
- the piston can be adapted to receive a force from a push rod on a drive mechanism for moving the piston relative to the seal to drive fluid through the chamber.
- the piston can float within the housing such that it is movable about a longitudinal axis thereof.
- the drive assembly can also include a biasing element that is coupled to the piston and that is effective to bias the piston to a first position in which the piston is fully removed from the chamber and the seal is open.
- a reusable pump cartridge in another aspect of the present invention, can include a housing that is removably matable to a drive mechanism and that includes a fluid flow chamber, a coupling chamber, and a seal separating the fluid flow chamber and the coupling chamber.
- the reusable pump cartridge can also include a piston that is movably disposed through the seal and that includes a receiving portion disposed within the coupling chamber and that is adapted to receive a push rod on a drive mechanism for moving the piston relative to the seal to drive fluid through the fluid flow chamber.
- the pump cartridge can also include a biasing element coupled to the piston and effective to bias the piston to a first position in which the piston is fully disposed within the pump chamber and the seal is open.
- the biasing element can also have a variety of configurations, but in one embodiment the biasing element can be a coil spring that is disposed around at least a portion of the piston to apply a biasing force to the second end of the head of the piston.
- the piston can have a variety of configurations, and in one exemplary embodiment the piston can be, for example, an elongate shaft having an enlarged head formed thereon.
- the head can include a substantially planar surface for receiving a push rod, or in another embodiment it can include a recess formed therein and defining the receiving portion.
- the piston can be formed from an autoclavable material, such as sapphire.
- the seal in the housing can also be formed from an autoclavable material, such as, for example, an impregnated fluoropolymer, such as a polymer-filled TEFLON®.
- Exemplary methods for using a pump cartridge are also provided.
- FIG. 1 is an illustration of a high pressure fluid jet system having a pump console with a pump cartridge connected thereto and in communication with a fluid jet delivery device in accordance with one exemplary embodiment of the present invention
- FIG. 2 is a perspective view of the pump cartridge of the high pressure fluid jet system of FIG. 1 ;
- FIG. 3A is a cross-sectional view of the pump cartridge shown in FIG. 2
- FIG. 3B is a perspective view of a portion of the pump cartridge shown in FIG. 3A ;
- FIG. 4A is a cross-sectional view of another exemplary embodiment of a pump cartridge for use with a high pressure fluid jet system
- FIG. 4B is a cross-sectional view of a portion of the pump cartridge shown in FIG. 4A ;
- FIG. 5 is a cross-sectional view of one exemplary embodiment of a valve mechanism for use with a pump cartridge.
- the present invention provides a pump cartridge for use in a high pressure fluid jet system.
- the pump cartridge can be adapted to couple to a drive mechanism for driving fluid from a fluid source, through the pump cartridge, to a fluid jet delivery device.
- the pump cartridge can be reusable to allow the pump cartridge to be sterilized between uses.
- the pump cartridge can be used with a variety of high pressure fluid jet systems for use in a variety of applications.
- FIG. 1 illustrates one exemplary embodiment of a high pressure fluid jet system 10 .
- the system 10 can include a drive mechanism 12 and a reusable pump cartridge 50 that can be releasably attached to the drive mechanism 12 .
- the system 10 can also include a fluid source 16 , such as a saline bag, for delivering fluid to the reusable pump cartridge 50 .
- the fluid source 16 can be coupled to the pump cartridge 50 using a variety of techniques, but in one exemplary embodiment the fluid source 16 includes a tube 16 a that extends between the fluid source 16 and the pump cartridge 50 .
- the system 10 can also include a fluid jet delivery device, which in the illustrated embodiment includes a fluid delivery tube 18 and fluid jet device 20 , for receiving fluid from the pump cartridge 50 and forming a high pressure fluid jet.
- a fluid jet delivery device which in the illustrated embodiment includes a fluid delivery tube 18 and fluid jet device 20 , for receiving fluid from the pump cartridge 50 and forming a high pressure fluid jet.
- the high pressure fluid jet can operate at various pressures depending on the intended use, in one exemplary embodiment the high pressure fluid jet system 10 is adapted to operate at a pressure in the range of about 1,000 to 20,000 psi, and more preferably in the range of about 5,000 to 15,000 psi.
- the high pressure fluid jet system can include a variety of other components, and that each component can have a variety of configurations.
- the components can be integrally formed with one another or they can be removably attached to one another.
- the exemplary pump cartridges disclosed herein can be used with a variety of other fluid jet systems, and that the exemplary fluid jet
- the drive mechanism can be part of a pump console 12 for pumping fluid through the pump cartridge 50 at a controlled rate.
- the exemplary pump console 12 can include a push rod 22 (shown in FIG. 4 ) that is driven by a motor disposed within the pump console 12 , and controls for allowing a user to input the desired pump parameters.
- the push rod 22 can have a variety of shapes and sizes, but in one exemplary embodiment the push rod 22 has a shape and size that enables it to extend from the pump console 12 and into the pump cartridge 50 to apply a force to a piston disposed within the pump cartridge 50 , as will be discussed in more detail below.
- the motor (not shown) is effective to reciprocate the push rod 22 along its axis, thereby reciprocating the piston disposed within the pump cartridge 50 to pump fluid through the cartridge 50 , as will also be discussed in more detail below.
- the fluid delivery tube 18 can also have a variety of configurations.
- the fluid delivery tube 18 can be formed from a material which has sufficient burst strength to safely deliver fluid at a high pressure to the fluid jet device 20 , and which has good maneuverability for the surgeon.
- the fluid delivery tube 18 can be coiled to provide good maneuverability.
- the fluid delivery tube 18 can also include connectors, which in an exemplary embodiment can be hand tightened, to connect the ends of the fluid delivery tube 18 to the pump cartridge 50 and the fluid jet device 20 , where detachable components are desired.
- the fluid delivery tube 18 can be integrally formed with or fixedly mated to the pump cartridge 50 and/or the fluid jet device 20 .
- the fluid jet device 20 can also have a variety of configurations, and virtually any device for forming a high pressure fluid jet can be used with the various embodiments disclosed herein.
- the fluid jet device 20 is in the form of a hand-held wand that includes a lumen in communication with the delivery tube 18 and a nozzle for forming a high pressure fluid jet.
- the fluid jet device 20 can also include an evacuation lumen for collecting the fluid jet, as well as a variety of other features for facilitating use of the device.
- one exemplary embodiment of a fluid jet device is disclosed in commonly owned U.S. patent application Ser. No. 10/904,456 filed on Nov. 11, 2004 and entitled “Methods and Devices for Selective Bulk Removal and Precision Sculpting of Tissue” by McRury et al.
- the high pressure fluid jet system 10 can include a pump cartridge 50 that is adapted to couple to the pump console 12 , and that is disposed between and effective to transfer fluid from the fluid source 16 to the fluid jet delivery device 18 , 20 .
- the pump cartridge 50 can have a variety of configurations, but in one exemplary embodiment, shown in FIGS. 3A and 3B , the pump cartridge 50 can be in the form of a housing having a first or fluid flow chamber 56 that is adapted to deliver fluid from the fluid source 16 to the fluid delivery tube 18 and pressure jet device 20 , and a second or coupling chamber 58 having a drive assembly 60 disposed therein and adapted to drive fluid through the fluid flow chamber 56 when the cartridge 50 is coupled to the console 12 .
- the exemplary pump cartridge 50 can also be adapted to be sterilized, thus allowing the pump cartridge to be reused. This can be achieved by configuring the pump cartridge 50 such that the internal chambers, e.g., the fluid flow chamber 56 and the coupling chamber 58 , of the cartridge 50 are in an open configuration when the pump cartridge 50 is disengaged from the console 12 .
- the pump cartridge is described as having a second or coupling “chamber” for reference purposes only, and that the components disposed within the second chamber of the pump cartridge does not necessarily need to be disposed within a “chamber” or a defined space.
- the fluid flow chamber 56 can have a variety of configurations, but in an exemplary embodiment, as shown, it includes an inlet port 56 a that is adapted to mate to the fluid source 16 , and an outlet port 56 b that is adapted to mate to the fluid delivery tube 18 .
- the inlet and outlet ports 56 a , 56 b can each include a valve mechanism disposed therein for controlling fluid flow therethrough. While a variety of valve mechanisms can be used, in one exemplary embodiment the inlet and outlet ports 56 a , 56 b each include a one-way ball-in-aperture valve 100 having a ball 102 that is sits within an aperture 104 , as shown in more detail in FIG. 5 .
- the valve 100 can also include a ball-retaining member 106 , such as a rod extending across the inlet and/or outlet ports 56 a , 56 b , that is adapted to retain the ball 102 within the valve housing 100 .
- a ball-retaining member 106 such as a rod extending across the inlet and/or outlet ports 56 a , 56 b , that is adapted to retain the ball 102 within the valve housing 100 .
- the ball 1 02 can prevent fluid from flowing out the inlet 56 a and in the outlet 56 b in the fluid flow chamber 56 .
- the cartridge 50 can be laid on its side such that the ball 102 moves away from the aperture 104 , thereby allowing the pump cartridge 50 to be sterilized as the fluid flow chamber 56 is in an open configuration, as will be discussed in more detail below.
- the exemplary fluid flow chamber 56 can be in communication with the coupling chamber 58 to allow the drive assembly 60 within the coupling chamber 58 to drive fluid through the fluid flow chamber 56 .
- a seal 62 can be disposed between the two chambers 56 , 58 .
- the seal 62 can have a variety of shapes and sizes, but in one exemplary embodiment the seal 62 separates the fluid flow chamber 56 and the coupling chamber 58 .
- the seal 62 can, however, include an opening 62 a formed therein for slidably receiving a piston 64 that is part of the drive assembly 60 disposed within the coupling chamber 58 .
- the piston 64 can be adapted to extend through the opening 62 a in the seal 62 when the pump cartridge 50 is attached to the console 12 , and it can retract into the coupling chamber 58 when the pump cartridge 50 is disengaged from the pump console 12 such that the fluid flow chamber 56 and the coupling chamber 58 are in communication with one another, thereby allowing the pump cartridge 50 to have an open configuration for sterilization.
- the opening 62 a in the seal 62 can have virtually any shape and size
- the opening 62 a has a shape and size that complements a shape and size of the piston.
- the opening can be circular to match a cylindrical-shaped piston.
- the seal 62 can be formed from a variety of materials. Exemplary materials include, by way of non-limiting example, an impregnated fluoropolymer, such as a polymer-filled TEFLON®.
- the coupling chamber 58 of the pump cartridge 50 can also have a variety of configurations, but as indicated above an exemplary coupling chamber 58 includes a drive assembly 60 disposed therein that is adapted to receive a force from the push rod 22 on the console 12 , and that is adapted to drive fluid through the fluid flow chamber 56 .
- an exemplary drive assembly 60 can include a piston 64 having a first portion or a head 64 a that is adapted to receive a force applied by the push rod 22 on the console 12 , and a second portion 64 b that extends through the seal 62 and into the fluid flow chamber 56 for driving fluid therethrough.
- the first and second portions 64 a , 64 b can have virtually any shape and size, but in one exemplary embodiment the second portion 64 b of the piston 64 can have a generally elongate cylindrical shape with an extent, e.g., a diameter D p that substantially corresponds to an extent, e.g., a diameter D o , of the opening 62 a in the seal 62 , and the first portion or head 64 a of the piston 64 can have a substantially planar configuration to allow the push rod 22 to abut there against.
- a diameter D p that substantially corresponds to an extent, e.g., a diameter D o , of the opening 62 a in the seal 62
- the first portion or head 64 a of the piston 64 can have a substantially planar configuration to allow the push rod 22 to abut there against.
- the head 64 a can be enlarged such that it has an extent, e.g., a diameter D h , that is greater than the diameter D p of the second portion 64 b , and that is greater than an extent, e.g., a diameter D c , of the push rod 22 (shown in FIGS. 4A and 4B ).
- Such a configuration allows the push rod 22 to contact any portion of the piston 64 , i.e., it allows a central axis of the push rod 22 to be aligned or misaligned with a central axis of the piston 64 .
- a mechanical interlocking fixation between the push rod 22 and the piston 64 is not necessary as the components do not need to be axially aligned.
- the piston 64 can include a recess formed in a proximal end thereof for receiving the push rod 22 .
- FIGS. 4A and 4B illustrate another embodiment of a pump cartridge 50 ′ that is similar to pump cartridge 50 shown in FIGS. 3A and 3B , but that includes a recess 64 c ′ formed in the piston 64 ′ for receiving the push rod 22 .
- the piston 64 ′ can have an enlarged head 64 a ′ formed thereon with a recess 64 c ′ formed within the head 64 ′.
- the pump cartridge 50 can include features to facilitate axial alignment of the piston 64 with the opening 62 a in the seal 62 .
- the pump cartridge 50 can include an alignment mechanism, such as a ring member 70 shown in FIGS. 3A and 3B , that is adapted to facilitate alignment of the second elongate portion 64 b of the piston 64 with the seal 62 .
- the exemplary ring member 70 can have a substantially cylindrical shape with an opening 72 formed therein for slidably receiving the elongate portion 64 b of the piston 64 . It can also include one or more projections 74 for guiding the piston 64 into the opening 72 during initial engagement, and/or for facilitating sterilization of the device as the projections will allow steam communication between the chambers.
- the ring member 70 is castellated.
- FIG. 3A illustrates the ring member 70 disposed within the pump cartridge 50 , and as shown the ring member 70 can be fixedly attached to the housing within the coupling chamber 58 such that the opening 72 is aligned with the opening 62 a of the seal 62 .
- the projections 74 guide the piston 64 toward the opening 72 , thereby substantially aligning the piston 64 with the opening 62 a in the seal 62 .
- the ring member 70 can also be effective to maintain the seal 62 in a substantially fixed position within the pump cartridge 50 .
- the piston 64 ′ can be self-aligning.
- a biasing element 68 ′ which will be discussed in more detail below, can be disposed around the piston 64 and used to maintain and substantially align the piston 64 with the opening in the seal 62 a .
- the piston 64 can move laterally about its axis such that the piston 64 can self-align with the seal opening 62 a .
- a person skilled in the art will appreciate that a variety of other techniques can be used to axially align the piston 64 with the seal 62 .
- the drive assembly 60 , 60 ′ in the pump cartridge 50 , 50 ′ can also include a biasing element 68 that is adapted to bias the piston 64 , 64 ′ into the coupling chamber 58 , 58 ′.
- a biasing element 68 can be used, in the exemplary embodiment shown in FIG. 3A the biasing element 68 can be in the form of a coil spring that is disposed around the elongate portion 64 b , 64 b ′ of the piston 64 , 64 ′ and that is positioned between the head 64 a of the piston 64 and the ring member 70 .
- FIGS. 4A and 4B also illustrate a coil spring 68 ′.
- the spring 68 ′ can maintain and substantially align the piston 64 ′ with the seal 62 while allowing some lateral movement of the piston 64 ′ such that the piston 64 ′ is self-aligning with the seal 62 .
- the biasing element 68 will apply a force in the direction of the console 12 , thereby forcing the piston 64 into contact with the push rod 22 .
- the motor when the motor is actuated and the push rod 22 is reciprocated along its axis, it will apply a counter-force to the biasing element 68 , thereby reciprocating the piston 64 through the seal 62 and into the fluid flow chamber 56 to pump fluid therethrough.
- the biasing element 68 can force the piston 64 out of the opening 62 a in the seal 62 and completely into the second chamber 58 such that the fluid flow chamber 56 and the coupling chamber 58 are open or in communication with one another.
- the pump cartridge 50 can also be turned on its side to cause the valves 100 to open, such that the entire pump cartridge 50 is open.
- the pump cartridge 50 can be sterilized, e.g., using an autoclave, cleaning agents, steam, gas, etc., for reuse.
- the cartridge 50 can be coupled to the console 12 using a variety of engagement techniques.
- suitable engagement mechanisms include a twist-lock mechanism, a threaded mechanism, or any other technique known in the art.
- the pump cartridge 50 can also include a lever 54 , shown in FIG. 2 , for facilitating attachment to and removal from the pump console 12 .
- the lever 54 can be used to rotate the pump cartridge 50 relative to the console 12 , thereby causing flanges, threads, or some other engagement mechanism on the cartridge 50 to engage the console 12 .
- the pump cartridge 50 can releasably engage the console 12 .
Abstract
A pump cartridge for use in a high pressure fluid jet system is provided. In an exemplary embodiment, the pump cartridge can be adapted to couple to a drive mechanism for driving fluid from a fluid source, through the pump cartridge, to a fluid jet delivery device, and the pump cartridge can be reusable to allow the pump cartridge to be sterilized between uses.
Description
- The present invention relates to high pressure fluid jet tools, and in particular to a reusable pump cartridge for use with a high pressure fluid jet.
- High pressure fluid jets for cutting tissue can offer several advantages over traditional cutting tools. In particular, high pressure fluid jets tend to emulsify soft tissue, thus avoiding thermal damage and necrosis which can arise from using laser cutters and electrosurgical cutters. The emulsified tissue can also be easily transported by aspiration away from the surgical site. Indeed, the fact that many fluid jet cutting devices include aspiration and evacuation as an integral portion of the device can be an added benefit for many surgical procedures.
- One drawback with current high pressure fluid jets used in surgical procedures is that they require a sterile fluid flow pathway from an external pump mechanism to a nozzle that forms the fluid jet. Most current high pressure fluid jets use a disposable fluid pathway that is sterilized during manufacturing, and that is discarded after use. The materials and the configuration of the fluid pathway often prevent the device from being sterilized after use.
- Accordingly, there remains a need for an improved high pressure fluid jet, and in particular for a reusable pump cartridge for a high pressure fluid jet system.
- In one exemplary embodiment, a reusable pump cartridge is provided for use in a high pressure fluid jet system. The pump cartridge can be adapted to couple to a drive mechanism for driving fluid through the pump cartridge. Between uses, the pump cartridge can be disengaged from the drive mechanism, sterilized, and reused.
- While the pump cartridge can have a variety of configurations, in one exemplary embodiment the pump cartridge can include a housing having a chamber adapted for fluid flow therethrough, and a drive assembly disposed therein and adapted to drive fluid through the chamber when the housing is coupled to a drive mechanism. The chamber can be adapted to have a sealed configuration when the housing is coupled to the drive mechanism, and the chamber can be adapted to have an open configuration when the housing is disengaged from a drive mechanism to allow the pump cartridge to be sterilized. In one exemplary embodiment, the chamber can include a one-way inlet valve that is adapted to allow fluid to flow into the chamber, and a one-way outlet valve that is adapted to allow fluid to flow out of the chamber. By way of non-limiting example, the inlet and outlet valves can be ball-in-aperture valves.
- The drive assembly can have a variety of configurations, but in one exemplary embodiment the drive assembly can include a piston that is movably disposed through a seal that separates the chamber from the drive assembly. The piston can be adapted to receive a force from a push rod on a drive mechanism for moving the piston relative to the seal to drive fluid through the chamber. In one exemplary embodiment, the piston can float within the housing such that it is movable about a longitudinal axis thereof. The drive assembly can also include a biasing element that is coupled to the piston and that is effective to bias the piston to a first position in which the piston is fully removed from the chamber and the seal is open.
- In another aspect of the present invention, a reusable pump cartridge is provided and it can include a housing that is removably matable to a drive mechanism and that includes a fluid flow chamber, a coupling chamber, and a seal separating the fluid flow chamber and the coupling chamber. The reusable pump cartridge can also include a piston that is movably disposed through the seal and that includes a receiving portion disposed within the coupling chamber and that is adapted to receive a push rod on a drive mechanism for moving the piston relative to the seal to drive fluid through the fluid flow chamber. The pump cartridge can also include a biasing element coupled to the piston and effective to bias the piston to a first position in which the piston is fully disposed within the pump chamber and the seal is open. The biasing element can also have a variety of configurations, but in one embodiment the biasing element can be a coil spring that is disposed around at least a portion of the piston to apply a biasing force to the second end of the head of the piston.
- The piston can have a variety of configurations, and in one exemplary embodiment the piston can be, for example, an elongate shaft having an enlarged head formed thereon. The head can include a substantially planar surface for receiving a push rod, or in another embodiment it can include a recess formed therein and defining the receiving portion. In another exemplary embodiment, the piston can be formed from an autoclavable material, such as sapphire. The seal in the housing can also be formed from an autoclavable material, such as, for example, an impregnated fluoropolymer, such as a polymer-filled TEFLON®.
- Exemplary methods for using a pump cartridge are also provided.
- The invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
-
FIG. 1 is an illustration of a high pressure fluid jet system having a pump console with a pump cartridge connected thereto and in communication with a fluid jet delivery device in accordance with one exemplary embodiment of the present invention; -
FIG. 2 is a perspective view of the pump cartridge of the high pressure fluid jet system ofFIG. 1 ; -
FIG. 3A is a cross-sectional view of the pump cartridge shown inFIG. 2 -
FIG. 3B is a perspective view of a portion of the pump cartridge shown inFIG. 3A ; -
FIG. 4A is a cross-sectional view of another exemplary embodiment of a pump cartridge for use with a high pressure fluid jet system; -
FIG. 4B is a cross-sectional view of a portion of the pump cartridge shown inFIG. 4A ; and -
FIG. 5 is a cross-sectional view of one exemplary embodiment of a valve mechanism for use with a pump cartridge. - The present invention provides a pump cartridge for use in a high pressure fluid jet system. The pump cartridge can be adapted to couple to a drive mechanism for driving fluid from a fluid source, through the pump cartridge, to a fluid jet delivery device. In an exemplary embodiment, the pump cartridge can be reusable to allow the pump cartridge to be sterilized between uses. A person skilled in the art will appreciate that the pump cartridge can be used with a variety of high pressure fluid jet systems for use in a variety of applications.
-
FIG. 1 illustrates one exemplary embodiment of a high pressurefluid jet system 10. As shown, thesystem 10 can include adrive mechanism 12 and areusable pump cartridge 50 that can be releasably attached to thedrive mechanism 12. Thesystem 10 can also include a fluid source 16, such as a saline bag, for delivering fluid to thereusable pump cartridge 50. The fluid source 16 can be coupled to thepump cartridge 50 using a variety of techniques, but in one exemplary embodiment the fluid source 16 includes a tube 16 a that extends between the fluid source 16 and thepump cartridge 50. Thesystem 10 can also include a fluid jet delivery device, which in the illustrated embodiment includes afluid delivery tube 18 andfluid jet device 20, for receiving fluid from thepump cartridge 50 and forming a high pressure fluid jet. While the high pressure fluid jet can operate at various pressures depending on the intended use, in one exemplary embodiment the high pressurefluid jet system 10 is adapted to operate at a pressure in the range of about 1,000 to 20,000 psi, and more preferably in the range of about 5,000 to 15,000 psi. A person skilled in the art will appreciate that the high pressure fluid jet system can include a variety of other components, and that each component can have a variety of configurations. Moreover, the components can be integrally formed with one another or they can be removably attached to one another. A person skilled in the art will also appreciate that the exemplary pump cartridges disclosed herein can be used with a variety of other fluid jet systems, and that the exemplary fluid jet system disclosed herein is merely disclosed for reference purposes. - While virtually any drive mechanism known in the art can be used, in one exemplary embodiment the drive mechanism can be part of a
pump console 12 for pumping fluid through thepump cartridge 50 at a controlled rate. Theexemplary pump console 12 can include a push rod 22 (shown inFIG. 4 ) that is driven by a motor disposed within thepump console 12, and controls for allowing a user to input the desired pump parameters. Thepush rod 22 can have a variety of shapes and sizes, but in one exemplary embodiment thepush rod 22 has a shape and size that enables it to extend from thepump console 12 and into thepump cartridge 50 to apply a force to a piston disposed within thepump cartridge 50, as will be discussed in more detail below. In use, the motor (not shown) is effective to reciprocate thepush rod 22 along its axis, thereby reciprocating the piston disposed within thepump cartridge 50 to pump fluid through thecartridge 50, as will also be discussed in more detail below. - The
fluid delivery tube 18 can also have a variety of configurations. In one exemplary embodiment, thefluid delivery tube 18 can be formed from a material which has sufficient burst strength to safely deliver fluid at a high pressure to thefluid jet device 20, and which has good maneuverability for the surgeon. As shown inFIG. 1A , thefluid delivery tube 18 can be coiled to provide good maneuverability. Thefluid delivery tube 18 can also include connectors, which in an exemplary embodiment can be hand tightened, to connect the ends of thefluid delivery tube 18 to thepump cartridge 50 and thefluid jet device 20, where detachable components are desired. As previously indicated, thefluid delivery tube 18 can be integrally formed with or fixedly mated to thepump cartridge 50 and/or thefluid jet device 20. - The
fluid jet device 20 can also have a variety of configurations, and virtually any device for forming a high pressure fluid jet can be used with the various embodiments disclosed herein. In the illustrated exemplary embodiment, thefluid jet device 20 is in the form of a hand-held wand that includes a lumen in communication with thedelivery tube 18 and a nozzle for forming a high pressure fluid jet. Thefluid jet device 20 can also include an evacuation lumen for collecting the fluid jet, as well as a variety of other features for facilitating use of the device. By way of non-limiting example, one exemplary embodiment of a fluid jet device is disclosed in commonly owned U.S. patent application Ser. No. 10/904,456 filed on Nov. 11, 2004 and entitled “Methods and Devices for Selective Bulk Removal and Precision Sculpting of Tissue” by McRury et al. - As previously indicated, the high pressure
fluid jet system 10 can include apump cartridge 50 that is adapted to couple to thepump console 12, and that is disposed between and effective to transfer fluid from the fluid source 16 to the fluidjet delivery device pump cartridge 50 can have a variety of configurations, but in one exemplary embodiment, shown inFIGS. 3A and 3B , thepump cartridge 50 can be in the form of a housing having a first orfluid flow chamber 56 that is adapted to deliver fluid from the fluid source 16 to thefluid delivery tube 18 andpressure jet device 20, and a second or couplingchamber 58 having adrive assembly 60 disposed therein and adapted to drive fluid through thefluid flow chamber 56 when thecartridge 50 is coupled to theconsole 12. Theexemplary pump cartridge 50 can also be adapted to be sterilized, thus allowing the pump cartridge to be reused. This can be achieved by configuring thepump cartridge 50 such that the internal chambers, e.g., thefluid flow chamber 56 and thecoupling chamber 58, of thecartridge 50 are in an open configuration when thepump cartridge 50 is disengaged from theconsole 12. - A person skilled in the art will appreciate that the pump cartridge is described as having a second or coupling “chamber” for reference purposes only, and that the components disposed within the second chamber of the pump cartridge does not necessarily need to be disposed within a “chamber” or a defined space.
- The
fluid flow chamber 56 can have a variety of configurations, but in an exemplary embodiment, as shown, it includes an inlet port 56 a that is adapted to mate to the fluid source 16, and an outlet port 56 b that is adapted to mate to thefluid delivery tube 18. The inlet and outlet ports 56 a, 56 b can each include a valve mechanism disposed therein for controlling fluid flow therethrough. While a variety of valve mechanisms can be used, in one exemplary embodiment the inlet and outlet ports 56 a, 56 b each include a one-way ball-in-aperture valve 100 having aball 102 that is sits within anaperture 104, as shown in more detail inFIG. 5 . Thevalve 100 can also include a ball-retainingmember 106, such as a rod extending across the inlet and/or outlet ports 56 a, 56 b, that is adapted to retain theball 102 within thevalve housing 100. In use, when thepump cartridge 50 is attached to the console 1 2, the ball 1 02 can prevent fluid from flowing out the inlet 56 a and in the outlet 56 b in thefluid flow chamber 56. When thepump cartridge 50 is disengaged from theconsole 12, thecartridge 50 can be laid on its side such that theball 102 moves away from theaperture 104, thereby allowing thepump cartridge 50 to be sterilized as thefluid flow chamber 56 is in an open configuration, as will be discussed in more detail below. - As is further shown in
FIGS. 3A and 3B , the exemplaryfluid flow chamber 56 can be in communication with thecoupling chamber 58 to allow thedrive assembly 60 within thecoupling chamber 58 to drive fluid through thefluid flow chamber 56. While various techniques can be used to couple the twochambers seal 62 can be disposed between the twochambers seal 62 can have a variety of shapes and sizes, but in one exemplary embodiment theseal 62 separates thefluid flow chamber 56 and thecoupling chamber 58. Theseal 62 can, however, include an opening 62 a formed therein for slidably receiving apiston 64 that is part of thedrive assembly 60 disposed within thecoupling chamber 58. As will be discussed in more detail below, thepiston 64 can be adapted to extend through the opening 62 a in theseal 62 when thepump cartridge 50 is attached to theconsole 12, and it can retract into thecoupling chamber 58 when thepump cartridge 50 is disengaged from thepump console 12 such that thefluid flow chamber 56 and thecoupling chamber 58 are in communication with one another, thereby allowing thepump cartridge 50 to have an open configuration for sterilization. Thus, while the opening 62 a in theseal 62 can have virtually any shape and size, in an exemplary embodiment the opening 62 a has a shape and size that complements a shape and size of the piston. For example, the opening can be circular to match a cylindrical-shaped piston. A person skilled in the art will appreciate that theseal 62 can be formed from a variety of materials. Exemplary materials include, by way of non-limiting example, an impregnated fluoropolymer, such as a polymer-filled TEFLON®. - The
coupling chamber 58 of thepump cartridge 50 can also have a variety of configurations, but as indicated above anexemplary coupling chamber 58 includes adrive assembly 60 disposed therein that is adapted to receive a force from thepush rod 22 on theconsole 12, and that is adapted to drive fluid through thefluid flow chamber 56. As shown inFIGS. 3A and 3B , anexemplary drive assembly 60 can include apiston 64 having a first portion or a head 64 a that is adapted to receive a force applied by thepush rod 22 on theconsole 12, and a second portion 64 b that extends through theseal 62 and into thefluid flow chamber 56 for driving fluid therethrough. The first and second portions 64 a, 64 b can have virtually any shape and size, but in one exemplary embodiment the second portion 64 b of thepiston 64 can have a generally elongate cylindrical shape with an extent, e.g., a diameter Dp that substantially corresponds to an extent, e.g., a diameter Do, of the opening 62 a in theseal 62, and the first portion or head 64 a of thepiston 64 can have a substantially planar configuration to allow thepush rod 22 to abut there against. The head 64 a can be enlarged such that it has an extent, e.g., a diameter Dh, that is greater than the diameter Dp of the second portion 64 b, and that is greater than an extent, e.g., a diameter Dc, of the push rod 22 (shown inFIGS. 4A and 4B ). Such a configuration allows thepush rod 22 to contact any portion of thepiston 64, i.e., it allows a central axis of thepush rod 22 to be aligned or misaligned with a central axis of thepiston 64. Thus, a mechanical interlocking fixation between thepush rod 22 and thepiston 64 is not necessary as the components do not need to be axially aligned. Accordingly, thepiston 64 can float within thepump cartridge 50 and relative to thepush rod 22. As a result, thepush rod 22 will not cause thepiston 64 to be misaligned with theseal 62, thereby reducing or avoiding potential wear on theseal 62. While not shown, the head 64 a of thepiston 64 can include one or more openings or other features formed therein to facilitate sterilization of thepump cartridge 50, and in particular to prevent thepiston 64 from sealing thesecond chamber 58 when the pump cartridge is disengaged from thedrive mechanism 12. - In another exemplary embodiment, the
piston 64 can include a recess formed in a proximal end thereof for receiving thepush rod 22.FIGS. 4A and 4B illustrate another embodiment of apump cartridge 50′ that is similar to pumpcartridge 50 shown inFIGS. 3A and 3B , but that includes arecess 64 c′ formed in thepiston 64′ for receiving thepush rod 22. In particular, thepiston 64′ can have an enlarged head 64 a′ formed thereon with arecess 64 c′ formed within thehead 64′. Therecess 64 c′ can have virtually any shape and size, but in an exemplary embodiment it has an extent, e.g., a diameter DR, that is substantially larger than an extent, e.g., the diameter DC, of thepush rod 22, as shown inFIG. 4B . Again, such a configuration allows thepush rod 22 to be received within any portion of therecess 64 c′, and does not require a mechanical connection to axially align thepiston 64 with thepush rod 22. Accordingly, thepiston 64′ can float within thepump cartridge 50 and relative to thepush rod 22. As a result, thepush rod 22 will not cause thepiston 64′ to be misalignment with theseal 62, thereby reducing or avoiding potential wear on theseal 62′. - The
piston piston - Referring back to
FIGS. 3A and 3B , while thepiston 64 can float within thecoupling chamber 58 and it does not need to be axially aligned with or mated to thepush rod 22 on theconsole 12, thepump cartridge 50 can include features to facilitate axial alignment of thepiston 64 with the opening 62 a in theseal 62. Various techniques can be used to achieve this, but in one exemplary embodiment thepump cartridge 50 can include an alignment mechanism, such as aring member 70 shown inFIGS. 3A and 3B , that is adapted to facilitate alignment of the second elongate portion 64 b of thepiston 64 with theseal 62. Theexemplary ring member 70 can have a substantially cylindrical shape with anopening 72 formed therein for slidably receiving the elongate portion 64 b of thepiston 64. It can also include one ormore projections 74 for guiding thepiston 64 into theopening 72 during initial engagement, and/or for facilitating sterilization of the device as the projections will allow steam communication between the chambers. For example, as shown inFIG. 3B , thering member 70 is castellated.FIG. 3A illustrates thering member 70 disposed within thepump cartridge 50, and as shown thering member 70 can be fixedly attached to the housing within thecoupling chamber 58 such that theopening 72 is aligned with the opening 62 a of theseal 62. As a result, when thepiston 64 moves toward theseal 62, theprojections 74 guide thepiston 64 toward theopening 72, thereby substantially aligning thepiston 64 with the opening 62 a in theseal 62. Thering member 70 can also be effective to maintain theseal 62 in a substantially fixed position within thepump cartridge 50. - In another embodiment, shown in
FIGS. 4A and 4B , thepiston 64′ can be self-aligning. In particular, a biasingelement 68′, which will be discussed in more detail below, can be disposed around thepiston 64 and used to maintain and substantially align thepiston 64 with the opening in the seal 62 a. Thepiston 64, however, can move laterally about its axis such that thepiston 64 can self-align with the seal opening 62 a. A person skilled in the art will appreciate that a variety of other techniques can be used to axially align thepiston 64 with theseal 62. - As indicated above, the
drive assembly pump cartridge element 68 that is adapted to bias thepiston coupling chamber element 68 can be used, in the exemplary embodiment shown inFIG. 3A the biasingelement 68 can be in the form of a coil spring that is disposed around the elongate portion 64 b, 64 b′ of thepiston piston 64 and thering member 70.FIGS. 4A and 4B also illustrate acoil spring 68′. As noted above, thespring 68′ can maintain and substantially align thepiston 64′ with theseal 62 while allowing some lateral movement of thepiston 64′ such that thepiston 64′ is self-aligning with theseal 62. - In use, when the
pump cartridge 50 is attached to theconsole 12, the biasingelement 68 will apply a force in the direction of theconsole 12, thereby forcing thepiston 64 into contact with thepush rod 22. As a result, when the motor is actuated and thepush rod 22 is reciprocated along its axis, it will apply a counter-force to the biasingelement 68, thereby reciprocating thepiston 64 through theseal 62 and into thefluid flow chamber 56 to pump fluid therethrough. When thepump cartridge 50 is removed or disengaged from theconsole 12, the biasingelement 68 can force thepiston 64 out of the opening 62 a in theseal 62 and completely into thesecond chamber 58 such that thefluid flow chamber 56 and thecoupling chamber 58 are open or in communication with one another. Thepump cartridge 50 can also be turned on its side to cause thevalves 100 to open, such that theentire pump cartridge 50 is open. As a result, thepump cartridge 50 can be sterilized, e.g., using an autoclave, cleaning agents, steam, gas, etc., for reuse. - A person skilled in the art will appreciate that the
cartridge 50 can be coupled to theconsole 12 using a variety of engagement techniques. By way of non-limiting example, suitable engagement mechanisms include a twist-lock mechanism, a threaded mechanism, or any other technique known in the art. Thepump cartridge 50 can also include alever 54, shown inFIG. 2 , for facilitating attachment to and removal from thepump console 12. For example, thelever 54 can be used to rotate thepump cartridge 50 relative to theconsole 12, thereby causing flanges, threads, or some other engagement mechanism on thecartridge 50 to engage theconsole 12. In certain exemplary embodiments, thepump cartridge 50 can releasably engage theconsole 12. - One skilled in the art will appreciate further features and advantages of the invention based on the above-described embodiments. Accordingly, the invention is not to be limited by what has been particularly shown and described, except as indicated by the appended claims. All publications and references cited herein are expressly incorporated herein by reference in their entirety.
Claims (25)
1. A reusable pump cartridge, comprising:
a housing having a chamber adapted to allow fluid flow therethrough, and a drive assembly adapted to drive fluid through the chamber when the housing is coupled to a drive mechanism, the chamber being adapted to have a sealed configuration when the housing is coupled to the drive mechanism, and the chamber being adapted to be in an open configuration when the housing is disengaged from a drive mechanism such that the housing, the chamber, and the drive assembly can be steam sterilized between uses.
2. The reusable pump cartridge of claim 1 , wherein the chamber includes an inlet, and outlet, and an opening formed between the chamber and the drive assembly.
3. The reusable pump cartridge of claim 2 , further comprising a seal disposed within the opening and adapted to have an open configuration when the housing is disengaged from a drive mechanism, and adapted to receive a portion of the drive assembly when the housing is coupled to the drive mechanism such that the chamber is sealed.
4. The reusable pump cartridge of claim 3 , wherein the drive assembly includes a piston movably disposed through the seal, the piston being adapted to receive a push rod on a drive mechanism for moving the piston relative to the seal to drive fluid through the chamber.
5. The reusable pump cartridge of claim 4 , wherein the piston floats within the housing such that it is movable about a longitudinal axis thereof.
6. The reusable pump cartridge of claim 4 , further comprising a biasing element coupled to the piston and effective to bias the piston to a first position in which the piston is fully removed from the chamber and the seal is open.
7. The reusable pump cartridge of claim 2 , wherein the inlet in the chamber includes a one-way inlet valve adapted to allow fluid to flow into the chamber, and the outlet in the chamber includes a one-way outlet valve adapted to allow fluid to flow out of the chamber.
8. The reusable pump cartridge of claim 7 , wherein the inlet and outlet valves comprise ball-in-aperture valves.
9. A reusable pump cartridge, comprising:
a housing removably matable to a drive mechanism, the housing including a fluid flow chamber, a coupling chamber, and a seal separating the fluid flow chamber and the coupling chamber;
a piston movably disposed through the seal and including a receiving portion disposed within the coupling chamber and adapted to receive a push rod on a drive mechanism for moving the piston relative to the seal to drive fluid through the fluid flow chamber; and
a biasing element coupled to the piston and effective to bias the piston to a first position in which the piston is fully disposed within the pump chamber and the seal is open.
10. The reusable pump cartridge of claim 9 , wherein the piston floats within the housing such that it is movable about a longitudinal axis thereof.
11. The reusable pump cartridge of claim 9 , wherein the receiving portion comprises a substantially planar surface.
12. The reusable pump cartridge of claim 9 , wherein the piston comprises an elongate shaft and the receiving portion comprises an enlarged head formed on an end of the elongate shaft, and wherein the enlarged head includes a substantially planar surface for receiving a push rod on a drive mechanism.
13. The reusable pump cartridge of claim 9 , wherein the piston is formed from an autoclavable material.
14. The reusable pump cartridge of claim 9 , wherein the piston is formed from sapphire.
15. The reusable pump cartridge of claim 9 , wherein the seal is formed from an autoclavable material.
16. The reusable pump cartridge of claim 9 , wherein the seal is formed from an impregnated fluoropolymer.
17. The reusable pump cartridge of claim 9 , wherein the biasing element comprises a coil spring disposed around at least a portion of the piston.
18. The reusable pump cartridge of claim 9 , wherein the piston comprises a head having a first end defining the receiving portion, and a second end having an elongate shaft extending therefrom and movably disposed through the seal.
19. The reusable pump cartridge of claim 18 , wherein the biasing element extends around a portion of the elongate shaft and applies a biasing force to the second end of the head.
20. The reusable pump cartridge of claim 9 , wherein the fluid flow chamber includes a one-way inlet valve adapted to allow fluid to flow into the fluid flow chamber, and a one-way outlet valve adapted to allow fluid to flow out of the fluid flow chamber.
21. The reusable pump cartridge of claim 20 , wherein the inlet and outlet valves comprise ball-in-aperture valves.
22. A reusable pump cartridge, comprising:
a housing adapted to couple to a fluid source, a fluid delivery tool, and a drive mechanism for driving fluid from the fluid source, through the housing, to the fluid delivery tool;
wherein the housing is adapted to have a first, sealed configuration when the housing is coupled to a fluid source, a fluid delivery tool, and a drive mechanism, and a second, open configuration when the housing is disengaged from the fluid source, the fluid delivery device, and the drive mechanism; and
wherein the housing is adapted to be steam sterilized in the second, open configuration.
23. A method for using a pump cartridge, comprising:
coupling a drive assembly in a pump cartridge to a drive mechanism, and coupling a fluid flow chamber in the pump cartridge to a fluid source and a fluid delivery tool;
activating the drive mechanism to drive fluid from the fluid source, through the fluid flow chamber, to the fluid delivery tool;
disengaging the pump cartridge from the drive mechanism, the fluid source, and the fluid delivery tool;
sterilizing the pump cartridge; and
repeating the steps of coupling and activating.
24. The method of claim 23 , wherein sterilizing the pump cartridge comprises autoclaving the pump cartridge.
25. The method of claim 23 , wherein the fluid delivery tool comprises a high pressure fluid jet.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/904,959 US20060120899A1 (en) | 2004-12-07 | 2004-12-07 | Reusable pump cartridge |
AU2005229675A AU2005229675B2 (en) | 2004-12-07 | 2005-11-02 | Reusable pump cartridge |
CA002528565A CA2528565A1 (en) | 2004-12-07 | 2005-11-30 | Reusable pump cartridge |
JP2005352308A JP2006187599A (en) | 2004-12-07 | 2005-12-06 | Reusable pump cartridge |
EP05257501A EP1669604A3 (en) | 2004-12-07 | 2005-12-06 | Reusable pump cartridge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/904,959 US20060120899A1 (en) | 2004-12-07 | 2004-12-07 | Reusable pump cartridge |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060120899A1 true US20060120899A1 (en) | 2006-06-08 |
Family
ID=36046702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/904,959 Abandoned US20060120899A1 (en) | 2004-12-07 | 2004-12-07 | Reusable pump cartridge |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060120899A1 (en) |
EP (1) | EP1669604A3 (en) |
JP (1) | JP2006187599A (en) |
AU (1) | AU2005229675B2 (en) |
CA (1) | CA2528565A1 (en) |
Cited By (5)
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US20090217734A1 (en) * | 2008-02-29 | 2009-09-03 | Dionex Corporation | Valve assembly |
US20110172646A1 (en) * | 2010-01-08 | 2011-07-14 | Medtronic, Inc. | Multi-material single-piece actuator member for miniature reciprocating piston pump in medical applications |
EP2711545A1 (en) | 2012-09-19 | 2014-03-26 | Erbe Elektromedizin GmbH | Pump unit for water jet surgery |
CN107975464A (en) * | 2016-10-24 | 2018-05-01 | 陶智军 | A kind of Miniature vacuum pump without oil |
WO2020180724A1 (en) * | 2019-03-01 | 2020-09-10 | Procept Biorobotics Corporation | Pump cartridge and console |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2578373C2 (en) * | 2014-05-30 | 2016-03-27 | Виталий Алексеевич САВЕНКОВ | Hydraulic device of volumetric displacement for pumping and/or proportioning liquids |
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CN107975464A (en) * | 2016-10-24 | 2018-05-01 | 陶智军 | A kind of Miniature vacuum pump without oil |
WO2020180724A1 (en) * | 2019-03-01 | 2020-09-10 | Procept Biorobotics Corporation | Pump cartridge and console |
Also Published As
Publication number | Publication date |
---|---|
EP1669604A3 (en) | 2008-10-29 |
CA2528565A1 (en) | 2006-06-07 |
AU2005229675A1 (en) | 2006-06-22 |
AU2005229675B2 (en) | 2007-09-27 |
JP2006187599A (en) | 2006-07-20 |
EP1669604A2 (en) | 2006-06-14 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: DEPUY MITEK, INC., MASSACHUSETTS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SENGUN, MEHMET Z.;WEINERT, CHRISTOPHER G.;RANUCCI, KEVIN J.;AND OTHERS;REEL/FRAME:016313/0073 Effective date: 20041221 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |