Surgical Instrument Having A Plastic Surface

• US 20120220988A1
• Filed: 05/07/2012
• Published: 08/30/2012
• Est. Priority Date: 10/06/2006
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Scirica, Paul A.
• Granted Patent: US 9,033,202 B2
• Time in Patent Office: Days
• US Class Current: 606/1
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/0686 having a forming anvil staying below the tissue during stapling
• CPC Class Codes: A61B 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/105 Wound clamp magazines for packaging sharps A61B50/3001
• CPC Class Codes: A61B 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/0084 low friction A61B2017/00853 takes precedence
• CPC Class Codes: A61B 2017/00845 of moving parts with respect to each other
• CPC Class Codes: A61B 2017/00853 low friction, hydrophobic and corrosion-resistant fluorocarbon resin coating (ptf, ptfe, polytetrafluoroethylene)
• CPC Class Codes: A61B 2017/00964 composite
• CPC Class Codes: A61B 2017/07214 Stapler heads
• CPC Class Codes: A61B 2017/07271 characterised by its cartridge
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 2017/2902 characterized by features of the actuating rod
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2936 : Pins in guiding slots
• CPC Class Codes: A61B 2017/2943 : Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2946 : Locking means
• CPC Class Codes: A61B 2017/320052 : Guides for cutting instruments by marking A61B2090/395

Abstract

A surgical instrument including a handle portion, a body portion, a movable handle, a tool assembly, a drive beam and a closure apparatus is disclosed. At least one of the closure apparatus and a contact surface of the tool assembly include a plastic surface. The body portion extends distally from the handle portion. The movable handle is located on the handle portion and is in mechanical cooperation with a drive member. The tool assembly includes an anvil, a cartridge assembly and a contact surface. The drive beam includes a proximal engagement portion and is configured to engage a portion of the drive member. The closure apparatus is configured to engage the contact surface of the tool assembly. At least a partial actuation of the movable handle moves the closure apparatus distally into engagement with the contact surface to approximate the anvil and the cartridge assembly.

Claims

1. A surgical instrument, comprising:

a tool assembly having an anvil and a cartridge assembly, at least one of the anvil and cartridge assembly defining a contact surface, the tool assembly defining a longitudinal axis;

a drive beam having a proximal end, a distal end, and an engagement portion disposed adjacent the proximal end thereof; and

a closure apparatus disposed at the distal end of the drive beam, the closure apparatus being formed from metal and having a first portion for engaging the contact surface, distal movement of the drive beam moving the first portion of the closure apparatus distally into engagement with the contact surface, the first portion of the closure apparatus including a plastic member to minimize friction between the first portion of the closure apparatus and the contact surface of the tool assembly.

2. The surgical instrument of claim 1, wherein the contact surface is at least partially formed from metal.

3. The surgical instrument of claim 1, wherein the plastic member is a plastic overmold at the first portion of the closure apparatus.

4. The surgical instrument of claim 1, wherein the closure apparatus includes an I-shaped cross-sectional configuration and has an upper horizontal portion and a lower horizontal portion.

5. The surgical instrument of claim 4, wherein each of the upper horizontal portion and the lower horizontal portion includes a plastic member.

6. The surgical instrument of claim 1, wherein each of the anvil and the cartridge assembly include a contact surface, and at least a portion of the contact surface of the anvil and at least a portion of the contact surface of the cartridge assembly includes a plastic member.

7. The surgical instrument of claim 1, wherein the drive beam has a plurality of layers.

8. The surgical instrument of claim 1, wherein the closure apparatus has a cutting member.

9. The surgical instrument of claim 1, wherein the plastic member has a reinforced section.

10. The surgical instrument of claim 1, wherein the plastic member is removable.

11. The surgical instrument of claim 1 further including a handle portion and an elongate body portion extending from the handle portion.

12. A surgical instrument, comprising:

a tool assembly having an anvil with a first contact surface and a cartridge assembly with a second contact surface, the tool assembly defining a longitudinal axis;

a drive beam having a proximal end, a distal end, and an engagement portion disposed adjacent the proximal end thereof;

and

a closure apparatus disposed at the distal end of the drive beam, the closure apparatus being formed from metal and having a first portion for engaging the first contact surface and a second portion for engaging the second contact surface, distal movement of the drive beam moving the first portion of the closure apparatus distally into engagement with the first contact surface, and the second portion of the closure apparatus distally into engagement with the second contact surface, at least one of the first contact surface and the second contact surface including a plastic member to minimize friction between the first portion of the closure apparatus and the contact surface of the tool assembly.

13. The surgical instrument of claim 12, wherein the first contact surface and the second contact surface are at least partially formed from metal.

14. The surgical instrument of claim 12, wherein the plastic member is a plastic overmold at the at least one of the first contact surface and the second contact surface.

15. The surgical instrument of claim 12, wherein the closure apparatus includes an I-shaped cross-sectional configuration and has an upper horizontal portion and a lower horizontal portion.

16. The surgical instrument of claim 15, wherein each of the upper horizontal portion and the lower horizontal portion includes a plastic member.

17. The surgical instrument of claim 12, wherein each of the first contact surface and the second contact surface includes a plastic member.

18. The surgical instrument of claim 12, wherein the drive beam has a plurality of layers.

19. The surgical instrument of claim 12, wherein the closure apparatus has a cutting member.

20. The surgical instrument of claim 12, wherein the plastic member has a reinforced section.

21. The surgical instrument of claim 12 further including a handle portion and an elongate body portion extending from the handle portion.