End effector assembly for electrosurgical device and method for making the same

• US 8,764,748 B2
• Filed: 01/28/2009
• Issued: 07/01/2014
• Est. Priority Date: 02/06/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Chojin, Edward M.
• Primary Examiner(s): BOUCHELLE, LAURA A
• Application Number:
  US12/361,375
• Publication Number:
  US 20090198233A1
• Time in Patent Office: 1,980 Days
• Field of Search: 606 42- 51
• US Class Current: 606/51
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2018/00619 Welding
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/1412 Blade
• CPC Class Codes: A61B 2018/1455 having a moving blade for cutting tissue grasped by the jaws
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An end effector assembly for use with a forceps is provided. The end effector assembly including a pair of opposing jaw members operatively connected to each other about a pivot. Each jaw member includes a structural support member having a seal plate secured thereto. Each of the seal plates defines a slot having a depth and configured to translate a knife blade therethrough. The combined depth of the slot is greater than the height of the knife blade.

Claims

1. An end effector assembly for use with a forceps, comprising;

a pair of opposing jaw members operatively connected to each other about a pivot, each jaw member including a structural support member having a seal plate secured thereto, each of the seal plates having electrically conductive top and bottom surfaces with a slot defined therebetween having a depth and configured to translate a knife blade therethrough, wherein the top surfaces are utilized to secure the seal plates to the respective structural support member, the slots extending only partially through a full thickness of the seal plates, the combined depth of the slots being greater than a height of the knife blade such that during translation of the knife blade through the slots, the knife blade does not extend into the structural support members,

wherein each of the structural support members includes at least one aperture extending partially therethrough such that at least a portion of each structural support member remains between the aperture and the respective seal plate to facilitate coupling of the structural support members to the respective seal plates.

2. The end effector assembly according to claim 1, wherein the seal plates are secured to their respective structural support members via at least one of welding, soldering or brazing.

3. The end effector assembly according to claim 2, wherein the type of welding is selected from the group consisting of resistance welding, ultrasonic welding, gas welding, energy beam welding, explosion welding, and solid state welding.

4. The end effector assembly according to claim 1, wherein the seal plates vary in thickness.

5. A method for manufacturing a jaw member of an end effector assembly for use with as forceps, the method comprising:

providing as structural support member, the structural support member including at least one aperture associated with a top surface thereof and extending partially therethrough;

providing a seal plate, the seal plate having electrically conductive top and bottom surfaces having a slot defined therebetween, wherein the top surface is utilized to secure the seal plate to the structural support member, the slot extending only partially through a full thickness of the seal plate, the seal plate configured to translate a knife blade therethrough such that during translation of the knife blade through the slot, the knife blade does not extend into the structural support member; and

utilizing the at least one aperture to couple the seal plate to the structural support member.

6. The method of according to claim 5, wherein utilizing the at least one aperture to couple the seal plate to the structural support member comprises coupling the seal plate to the structural support member by a process selected from the group consisting of welding, soldering and brazing.

7. The method according to claim 6, wherein utilizing the at least one aperture to the seal plate to the structural support member comprises coupling the seal plate to the structural support member by the process selected from the group consisting of resistance welding, ultrasonic welding, gas welding, energy beam welding, explosion welding, and solid state welding.

8. An end effector assembly for use with a forceps, comprising:

a pair of opposing jaw members operatively connected to each other about a pivot, each jaw member including a structural support member having a seal plate secured thereto, each of the seal plates having electrically conductive top and bottom surfaces with a slot defined therebetween having a depth and configured to translate a knife blade therethrough, wherein the top surfaces are utilized to secure the seal plates to the respective structural support member, the slots extending only partially through a full thickness of the seal plates, the combined depth of the slots being greater than a height of the knife blade such that during translation of the knife blade through the slots, the knife blade does not extend into the structural support members;

wherein each of the structural support members includes at least one aperture extending partially therethrough such that at least a portion of each structural support member remains between the at least one aperture and the seal plate and is configured to form part of a weld therebetween to facilitate structural engagement of the structural support member to a respective seal plate.