Insulating boot for electrosurgical forceps with thermoplastic clevis

• US 8,221,416 B2
• Filed: 09/12/2008
• Issued: 07/17/2012
• Est. Priority Date: 09/28/2007
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Townsend, Jeffrey R.
• Primary Examiner(s): Mehta, Bhisma
• Application Number:
  US12/209,417
• Publication Number:
  US 20090088744A1
• Time in Patent Office: 1,404 Days
• Field of Search: 606/46, 606/47, 606/48, 606/49, 606/50, 606/51, 606/206, 606/207, 606/52, 606/205
• US Class Current: 606/51
• 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 2018/00083 low, i.e. electrically insulating

Abstract

An electrosurgical forceps includes a shaft having a pair of jaw members at a distal end movable about a pivot from a first position disposed in spaced relation relative to one another to a second position wherein the jaw members are closer to one another for grasping tissue. A movable handle actuates the shaft to move the jaw members relative to one another. One or both jaw members are capable of conducting electrical energy to tissue held therebetween. An insulating boot is disposed on at least a portion of an exterior surface of one or both jaw members about the pivot and at a distal end of the shaft. The insulating boot includes an overmolded thermoplastic clevis disposed on an inner periphery thereof configured to enhance mechanical engagement of the insulating boot with the one or both jaw members and the distal end of the shaft.

Claims

1. An electrosurgical forceps, comprising:

a shaft having a pair of jaw members at a distal end thereof, the jaw members being movable about a pivot from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members are closer to one another for grasping tissue;

a movable handle that actuates the shaft to move the jaw members relative to one another;

at least one of the jaw members adapted to connect to a source of electrical energy such that the at least one jaw member is capable of conducting energy to tissue held therebetween; and

an insulating boot disposed on at least a portion of an exterior surface of at least one jaw member, about the pivot and at a distal end of the shaft, the insulating boot including an overmolded thermoplastic clevis disposed on an inner periphery thereof, the overmolded thermoplastic clevis being configured to enhance the mechanical engagement of the insulating boot with the at least one jaw member and the distal end of the shaft, the insulating boot further including an outer thermoplastic portion that is configured to further enhance the rigidity of the insulating boot.

2. An electrosurgical forceps according to claim 1, wherein the overmolded thermoplastic clevis includes a pair of fingers that project inwardly to mechanically engage a proximal end of the at least one jaw member.

3. An electrosurgical forceps according to claim 1 wherein the outer thermoplastic portion includes at least one channel defined therein to facilitate movement of the jaw members from the first to second positions.

4. An electrosurgical forceps according to claim 1 wherein the outer thermoplastic portion includes a relief to allow the insulating boot to expand during movement of the jaw members.

5. An electrosurgical forceps, comprising:

a shaft having a pair of jaw members at a distal end thereof, the jaw members being movable about a pivot from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members are closer to one another for grasping tissue;

a movable handle that actuates the shaft to move the jaw members relative to one another;

at least one of the jaw members adapted to connect to a source of electrical energy such that the at least one jaw member is capable of conducting energy to tissue held therebetween; and

an insulating boot disposed on at least a portion of an exterior surface of at least one jaw member, about the pivot and at a distal end of the shaft, the insulating boot including a plurality of thermoplastic rails disposed along an outer periphery thereof.

6. An electrosurgical forceps according to claim 5, wherein the rails are configured to enhance the rigidity of the insulating boot along a length thereof.