Pump cartridge and console

Patent metadata

Field	Value
Publication number	US-12146487-B2
Application number	US-202017310777-A
Country	US
Kind code	B2
Filing date	Feb 28, 2020
Priority date	Mar 1, 2019
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A pump cartridge comprises a retention structure to retain a piston for shipping and storage, in which the piston can be decoupled from the retention structure to pump fluid. In the shipping and storage configuration, the piston can be positioned with the retention structure to allow sterilization gas to travel within a housing and into a cylinder distal to the piston. When placed in the console for use in a pumping configuration, the piston can be decoupled from the retention structure to form a seal within the housing. When the procedure has been completed, the pump cartridge can be decoupled from the console in a manner that disables the cartridge for subsequent use to prevent a non-sterile cartridge from being reused.

First claim

What is claimed is:

1. A pump cartridge comprising:
a piston;
a housing comprising a channel, an inlet, and an outlet, the channel comprising a cylinder shaped to receive the piston;
an engagement structure to couple the piston to a pushrod in response to axial movement of the pushrod or the housing; and
a casing over a portion of the housing, wherein the engagement structure is supported with outside the channel;
wherein the piston is connected to the engagement structure and the engagement structure is connected to the casing in a storage configuration with the piston outside the cylinder in order to permit a sterilization gas to flow from an interior of the casing into the cylinder and wherein the casing comprising an opening to allow the sterilization gas to flow from an exterior of the casing to the interior of the casing and into the cylinder.

2. The pump cartridge of claim 1 , wherein the engagement structure is connected to the casing and configured to decouple from the casing with axial advancement of the pushrod.

3. The pump cartridge of claim 2 , wherein the casing comprises an opening to receive the pushrod and wherein the engagement structure extends through the opening from the interior of the casing to the exterior of the casing.

4. The pump cartridge of claim 3 , wherein an exterior portion of the engagement structure is configured to advance through the opening and into the interior of the casing when coupled to the pushrod.

5. The pump cartridge of claim 4 , wherein the exterior portion of the engagement structure is configured to remain within the interior of the casing when decoupled from the pushrod.

6. The pump cartridge of claim 1 , further comprising a retention structure connected to the casing to retain the engagement structure in a shipping configuration and to decouple from the engagement structure in response to axial force from the pushrod.

7. The pump cartridge of claim 6 , wherein the retention structure comprises a plurality of inclined tabs configured to deflect upon axial advancement of the engagement structure toward the interior of the casing and to remove the engagement structure from the pushrod upon retraction of the pushrod from the interior.

8. The pump cartridge of claim 1 , wherein a distal tip of the piston is located outside the cylinder and within the channel.

9. The pump cartridge of claim 1 , wherein the engagement structure is configured to couple to the pushrod with a first amount of axial force and to decouple from the pushrod with a second amount of axial force greater than the first amount of force.

10. The pump cartridge of claim 9 , wherein the first amount of axial force is oriented in a first direction and the second amount of axial force is oriented in a second direction.

11. The pump cartridge of claim 1 , wherein the engagement structure is configured to deform upon decoupling from the pushrod.

12. The pump cartridge of claim 1 , further comprising a retention structure coupled to the housing and the engagement structure, wherein the retention structure is configured to decouple from the engagement structure in response to the axial movement of the pushrod or the housing.

13. The pump cartridge of claim 12 , further comprising a seal located in the channel, wherein the retention structure is configured to retain the engagement structure with the piston positioned in relation to the seal so as to define a gap between at least a portion of the piston and the seal in order to allow a sterilizing gas to enter the cylinder.

14. The pump cartridge of claim 12 , wherein the retention structure is configured to retain the engagement structure with the piston positioned in relation to the cylinder so as to define a gap between at least a portion of the piston and the cylinder in order to allow the sterilizing gas to enter the cylinder.

15. The pump cartridge of claim 12 , wherein the retention structure is configured to retain the engagement structure and release the engagement structure in response to axial advancement of the pushrod.

16. The pump cartridge of claim 15 , wherein the retention structure comprises a plurality of extensions sized and shaped to engage a groove on the engagement structure, the plurality of extensions inclined toward the engagement structure and the inlet of the cylinder in order to allow the engagement structure to move toward the cylinder with axial advancement of the pushrod and to decouple the engagement structure from the pushrod with axial retraction of the pushrod away from the cylinder.

17. The pump cartridge of claim 16 , wherein the engagement structure comprises the groove or a flange to receive the plurality of extensions to retain the engagement structure with the retention structure and wherein the plurality of extensions is configured to deflect radially away from the piston to allow advancement of the piston toward the cylinder.

18. The pump cartridge of claim 15 , wherein the engagement structure is configured to engage the pushrod with a first amount of force and the retention structure is configured to decouple from the engagement structure with a second amount of force, the second amount of force greater than the first amount of force.

19. The pump cartridge of claim 18 , wherein the engagement structure is configured to retain coupling between the pushrod and the piston with an amount of force sufficient to draw the piston proximally with reciprocal motion of the piston in the cylinder and the pushrod coupled to the piston.

Assignees

• Procept Biorobotics Corp

Inventors

• Staid Kevin
• Alvord Lincoln
• Beeby Ruth

Classifications

• F04B53/16

  Casings; Cylinders; Cylinder liners or heads; Fluid connections · CPC title

• A61B17/3203 Primary

  Fluid jet cutting instruments · CPC title

• A61M2205/6072

  Bar codes · CPC title

• A61M5/1422

  with double acting or multiple pistons · CPC title

• A61M2205/3331

  Pressure; Flow · CPC title