Laparoscopic forceps assembly for gripping and dissection

Patent metadata

Field	Value
Publication number	US-12419659-B2
Application number	US-202217804022-A
Country	US
Kind code	B2
Filing date	May 25, 2022
Priority date	Mar 27, 2019
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A surgical device comprising: (a) a first jaw; (b) a second jaw opposing the first jaw, the first jaw, the second jaw, or both being movable relative to one another between a jaw nominal position and a jaw clamped position; (c) a clamp lever in communication with the first jaw and the second jaw, the clamp lever moving the first jaw, the second jaw, or both from the jaw nominal position to the jaw clamped position when an external force is imparted upon the clamp lever in a first direction; and (d) a stop bias member that stops movement of the clamp lever when the external force is removed so that the first jaw and the second jaw are in the jaw nominal position at rest; wherein the first jaw and the second jaw are movable from the jaw nominal position to a jaw spread position when the clamp lever is moved in a second direction that opposes the first direction by an external force deforming the stop bias member so that a distance between the first jaw and the second jaw is larger in the jaw spread position than in the jaw nominal position.

First claim

We claim:

1. A surgical device comprising:
a first jaw;
a second jaw opposing the first jaw, the first jaw, the second jaw, or both being movable relative to one another between a jaw nominal position and a jaw clamped position;
a clamp lever operable for moving the first jaw, the second jaw, or both from the jaw nominal position to the jaw clamped position when an external force is imparted upon the clamp lever in a first direction; and
a stop bias member that stops movement of the clamp lever when the external force is removed so that the first jaw and the second jaw are in the jaw nominal position at rest, and
a return bias member, wherein the return bias member provides a force in a first direction and the stop bias member provides a force in a second direction that opposes the return bias member force so that a net force is zero.

2. The surgical device of claim 1 ,
wherein the first jaw and the second jaw are movable from the jaw nominal position to a jaw spread position when the clamp lever is moved in a second direction that opposes the first direction by a second external force deforming the stop bias member so that a distance between the first jaw and the second jaw is larger in the jaw spread position than in the jaw nominal position, and
wherein, the stop bias member, after being deformed by the external force, applies a force to return the first jaw and the second jaw to the jaw nominal position when the first and second jaws are in the jaw spread position.

3. The surgical device of claim 2 , further comprising a fixed handle, wherein the clamp lever is movable relative to the fixed handle in the first direction and the second direction.

4. The surgical device of claim 3 , wherein the fixed handle is part of a housing and the clamp lever is movably connected to the housing.

5. The surgical device of claim 1 wherein the stop bias member has a pre-load.

6. The surgical device of claim 1 , wherein the stop bias member is a compression spring or a compliant plug.

7. The surgical device of claim 1 , wherein the clamp lever is connected to one or more actuators.

8. The surgical device of claim 7 , wherein the one or more actuators are connected to one or more inner tubes and movement of the one or more actuators moves the one or more inner tubes and the first jaw, the second jaw, or both.

9. A surgical device comprising:
a handpiece;
a first jaw;
a second jaw opposing the first jaw, wherein the first jaw and the second jaw are movable relative to one another between a jaw nominal position and a jaw clamped position;
a movable clamp lever extending from the handpiece and operable to control relative movement of the first jaw and the second jaw from the jaw nominal position to the jaw clamped position when the clamp lever is actuated in a first direction; and
a stop bias member that stops movement of the clamp lever when the actuation of the clamp lever in the first direction is ceased so that the first jaw and the second jaw are in the jaw nominal position at rest, and
a return bias member, wherein the return bias member provides a force in a first direction and the stop bias member provides a force in a second direction that opposes the return bias member force so that a net force is zero.

10. The surgical device of claim 9 , wherein the first jaw and the second jaw are movable from the jaw nominal position to a jaw spread position when the clamp lever is actuated in a second direction that opposes the first direction.

11. The surgical device of claim 10 , wherein actuating the clamp lever in the second direction deforms the stop bias member so that a distance between the first jaw and the second jaw is larger in the jaw spread position than in the jaw nominal position.

12. The surgical device of claim 9 , wherein the return bias member is a spring.

13. The surgical device of claim 9 , wherein the return bias member has a pre-load in the jaw nominal position.

14. A surgical device comprising:
a first jaw;
a second jaw opposing the first jaw, the first jaw, the second jaw, or both being movable relative to one another between a jaw nominal position and a jaw clamped position;
a clamp lever operable for moving the first jaw, the second jaw, or both from the jaw nominal position to the jaw clamped position when an external force is imparted upon the clamp lever in a first direction;
a stop bias member that stops movement of the clamp lever when the external force is removed so that the first jaw and the second jaw are in the jaw nominal position at rest; and
a return bias member, wherein the return bias member provides a force in a first direction and the stop bias member provides a force in a second direction that opposes the return bias member force so that a net force is zero.

15. The surgical device of claim 14 , wherein the first jaw and the second jaw are movable from the jaw nominal position to a jaw spread position when the clamp lever is moved in a second direction that opposes the first direction so that a distance between the first jaw and the second jaw is larger in the jaw spread position than in the jaw nominal position.

Assignees

• Gyrus Acmi Inc

Inventors

• Blus Theodore C
• Ward Zane R
• Nelson Jeffrey
• Moe Riyad

Classifications

• A61B2017/2932

  Transmission of forces to jaw members · CPC title

• A61B2017/00424

  ergonomic, e.g. fitting in fist · CPC title

• A61B17/32

  Surgical cutting instruments ({A61B18/042 takes precedence; suture cutters A61B17/0467;} implements for ligaturing and cutting {A61B17/122, A61B17/12; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133}) · CPC title

• A61B2017/2922

  toggle linkages · CPC title

• A61B17/295

  combined with cutting implements · CPC title