Instrument for gripping or cutting

• US 4,644,651 A
• Filed: 11/18/1985
• Issued: 02/24/1987
• Est. Priority Date: 03/19/1984
• Status: Expired due to Fees

• Current Assignee: Jacobsen Research Corporation
• Original Assignee: Jacobsen Research Corporation
• Inventors: Jacobsen, Stephen C.
• Primary Examiner(s): Watts, Douglas D.
• Application Number:
  US06/798,840
• Time in Patent Office: 463 Days
• Field of Search: 30/124, 30/251, 30/262, 294/11, 294/104, 292/108, 292/155, 292/210, 280/615, 128/731, 128/305, 128/318, 128/321
• US Class Current: 30/251
• CPC Class Codes: A61B 17/2804 with two or more pivotal connections A61B17/29 takes precedence
• CPC Class Codes: A61B 17/2909 Handles
• CPC Class Codes: A61B 17/3201 Scissors for biopsy A61B10/02
• CPC Class Codes: A61B 2017/00438 connectable to a finger
• CPC Class Codes: A61B 2017/2939 Details of linkages or pivot points
• CPC Class Codes: A61B 2017/2946 Locking means
• CPC Class Codes: Y10T 292/0959 Swinging catch
• CPC Class Codes: Y10T 292/1092 Swinging catch

Abstract

An instrument for cutting, gripping or clamping includes a base arm with a fixed jaw at one end thereof, and a movable jaw pivotally attached to the arm adjacent the fixed jaw. Also included is a shank, one end of which is pivotally connected to the movable jaw, with the shank extending generally parallel to the arm over its full length. An elongated handle which overlies the shank includes a laterally extending section which is pivotally connected to the other end of the arm and to the other end of the shank. When the handle is pivoted toward the shank, the movable jaw is caused to pivot toward the fixed jaw, and when the handle is pivoted away from the shank, the movable jaw is caused to pivot away from the fixed jaw.

Claims

1. An instrument for gripping or cutting comprising

an elongate base arm having a fixed jaw at a first end thereof which projects outwardly from the base arm,

a movable jaw having a laterally extending member at a rear end of the jaw pivotally mounted on said arm adjacent the fixed jaw to pivot and cause the movable jaw to move toward the fixed jaw to a closed position and away from the fixed jaw to an open position, said movable jaw projecting outwardly generally parallel to and in close proximity or contact with the fixed jaw when in the closed position,

a shank extending generally parallel to said arm, one end of which is pivotally connected to the movable jaw, and

an elongated handle having a first laterally extending section at a rear end, said section being pivotally mounted on said arm at a second end thereof opposite the first end, said elongated handle having a second laterally extending section located forwardly of the first section and pivotally connected to the other end of the shank so that a forward end of the handle extends forwardly in an overlying relationship with the shank, and so that as the handle is pivoted toward the shank to a position generally parallel with the shank and arm, the shank is moved to cause the movable jaw to pivot to the closed position.

2. An instrument as defined in claim 1 further including first biasing means for normally biasing the handle to pivot away from the shank.

3. An instrument as defined in claim 2 further including a latch mounted to engage and hold the handle when it is pivoted to a position generally parallel with the shank.

4. An instrument as defined in claim 3 wherein the latch comprises

a post mounted on the arm to move between a latch position and release position,

a knob formed on top of the post to engage and hold the free end of the handle when the handle is pivoted to a position generally parallel with the shank and when the post is in the latch position, with the knob including a sloping rear surface over which the end of the handle may slide to force the knob and post forwardly toward the release position, and

second biasing means for normally biasing the post and knob to the latch position.

5. An instrument as in claim 4 wherein said arm includes a cavity which faces upwardly for receiving the lower end of the post, and wherein said shank includes an opening positioned above and generally in line with the cavity, said post being mounted to extend from the cavity through the opening.

6. An instrument as in claim 3 wherein the latch comprises

an arcuate post mounted on the arm to extend toward the handle and to move between a latch position and a release position, said post including a plurality of notches spaced apart longitudinally along one side of the post to engage and hold the free end of the handle in a selectable one of a plurality of positions defined by the notches, and

second biasing means for normally biasing the post to the latch position.

7. An instrument as in claim 6 wherein said arm includes a cavity which faces upwardly for receiving the lower end of the post, and wherein said shank includes an opening positioned above and generally in line with the cavity, said post being mounted to extend from the cavity through the opening.

8. An instrument as in claim 3 wherein the latch comprises

a post mounted on the arm to pivot between a latch position and release position,

a head formed on top of the post and having a forward projection and a rearward projection, with the rearward projection including a sloping rear surface over which the end of the handle may slide to force the head and post forwardly toward the release position to allow the end of the handle to slip under the rearward projection to be held thereby, said head and post pivoting forwardly to release the handle when the forward pojection is pressed, and

second biasing means for normally biasing the post and head to the latch position.

9. An instrument as in claim 8 wherein said arm includes a cavity which faces upwardly for receiving the lower end of the post, and wherein said shank includes an opening positioned above and generally in line with the cavity, said post being mounted to extend from the cavity through the opening.

10. An instrument as in claim 3 wherein said latch comprises a camming element formed on the end of the handle, a post mounted on the arm to move between a latch position and release position, and a head formed on top of the post and having a camming track formed therein for receiving the camming element when the handle is first pivoted toward the shank, and for releasing the camming element when the handle is next again pivoted toward the shank.

11. An instrument as in claim 10 wherein said arm includes a cavity which faces upwardly for receiving the lower end of the post, and wherein said shank includes an opening positioned above and generally in line with the cavity, said post being mounted to extend from the cavity through the opening.

12. An instrument as in claim 1 wherein said handle is constructed of an elastic material to allow resilient bending of the handle.

13. An instrument as in claim 1 wherein said shank is constructed of an elastic material to allow resilient longitudinal flexing of the shank.

14. An instrument as in claim 1 wherein the fixed jaw and moveable jaw are formed to extend at an angle to the arm and shank.

15. An instrument as in claim 1 further including an annular element positioned on top of the handle at the free end thereof for receiving the end of a person'"'"'s finger with the handle being generally perpendicular to the place defined by the annular element.

16. An instrument for gripping or cutting comprising

an elongate base arm having a fixed jaw at one end thereof,

a movable jaw having a laterally extending member at a rear end of the jaw pivotally mounted on said arm adjacent the fixed jaw to pivot and cause the movable jaw to move toward and away from the fixed jaw,

a bar extending generally parallel to said arm, one end of which is pivotally connected to the rear end of the movable jaw, and

an elongated handle having a first laterally extending section at a rear end, said section being pivotally mounted on said arm at a location spaced from the location at which the movable jaw is mounted to the arm, said elongated handle having a second section extending laterally in the same direction as the first section but not as great a distance as and forwardly of the first section, said second section being pivotally connected to the other end of the bar so that a forward end of the arm is pivotable forwardly and downwardly toward the arm to move the bar forwardly and cause the movable jaw to pivot toward the fixed jaw.