Energy storage means for a surgical stapler

• US 4,869,415 A
• Filed: 09/26/1988
• Issued: 09/26/1989
• Est. Priority Date: 09/26/1988
• Status: Expired due to Term

• Current Assignee: Ethicon Incorporated (Johnson & Johnson)
• Original Assignee: Ethicon Incorporated (Johnson & Johnson)
• Inventors: Fox, William D.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Wolfe, James L.
• Application Number:
  US07/249,537
• Time in Patent Office: 365 Days
• Field of Search: 227/19, 227/76, 227/132, 227/133, 227/146, 227/DIG. 1, 128/334 R
• US Class Current: 227/19
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially

Abstract

An initiating device which imparts stored potential energy to the driver and cutter in an internal organ stapler. Also disclosed is an overriding device which prevent the use of such a device until the proper clamping of the jaws of the stapler with each other.

Claims

1. In a surgical stapler having initiating means capable of activating driving means for driving staples into tissue, the improvement comprising energy storage means capable of imparting potential energy to said initiating means, said imparted energy causing said initiating means to overcome forces imparted by said tissue against said initiation means, said energy storage means comprising spring means connected to a camming means having a groove and the body of said stapler, said spring means capable of having potential energy imparted thereon by the user, said potential energy held in place on said camming means by first detent means attached to said stapler body and capable of holding said initiating means in place on said stapler until ready for use, said initiating means capable of displacing said detent means and said potential energy on said initiating means during use.

2. In the surgical stapler of claim 1, said initiating means comprising handle means connected to said driving means, said handle means terminating in a dowel insertable in said camming means of said energy storage means, and held within said groove until the disengaging of said first detent means.

3. In the surgical stapler of claim 2, said first detent means pivotable on said handle means and culminating in a peg insertable in a slot on said stapler body in order to hold said handle means and said energy storage means stable until said stapler is ready for use, upon which said first detent means is pivoted out of said slot and said potential energy is imparted on said handle means.

4. In the surgical stapler of claim 3, wherein said stapler comprises a first jaw attachable to a second jaw to fit around said tissue, the improvement further comprising overriding means capable of holding said energy storage means and said cutting means in place until said jaws are properly attached to each other.

5. In the surgical stapler of claim 4, wherein said first jaws is attached to said second jaw by means of a clamp actuating a lever on said first jaw, said overriding means comprising second detent means spring-loaded and insertable into said driving means, said second detent means pivotable out of said driving means by contact with a peg located on said lever upon the closing of said first and second jaws.

6. In the surgical stapler of claim 5, said second detent means comprising a hooking bar capable of being hooked onto a mating groove located on said driving means in order to hold said drawing means in place until said second detent means is pivoted out of said driving means.

7. In the surgical stapler of claim 1 wherein said stapler comprises a first jaw attachable to a second jaw to fit around said tissue, the improvement further comprising overriding means capable of holding said energy storage means in place until said jaws are properly attached to each other.

8. In the surgical stapler of claim 7 wherein said first jaw is attached to said second jaw by means of a clamp actuating a lever on said first jaw, said overriding means comprising second detent means spring-loaded and insertable into said driving means, said second detent means pivotable out of said driving means by contact with a peg located on said lever upon closing of said first and second jaws.

9. In the surgical stapler of claim 8, said second detent means comprising a hooking bar capable of being hooked onto a mating groove located on said driving means.

10. A surgical stapler comprising:

a first jaw attachable to a second jaw by means of a clamp activated by a lever on said first jaw;

driving means for driving staples located on one of said jaws into tissue placed between said jaws;

a handle connected to said driving means for guiding said driving means within said stapler;

said driving means insertable in camming means attached to one of said jaws by a loadable spring;

said handle having a dowel insertable on a slot within one of said jaws to hold said handle and said loaded spring in place until said stapler is ready for use, whereupon said dowel is pivoted out of said slot and potential energy from said spring is imparted by said camming means on said driving means to overcome forces imparted by said tissue against said driving means and said handle.

11. The surgical staple of claim 10 wherein said first jaw further comprises a peg located on said lever and a hooking bar spring-loaded and pivotable into a mating groove on said driving means, said hooking bar holding said driving means within said stapler, until said peg pivots said hooking bar out of said mating groove upon the proper clamping of said first jaw to said second jaw of said stapler.

12. The surgical stapler of claim 11 wherein the pivoting of said hooking bar permits said handle to be pivoted out of said slot and the imparting of said potential energy by said camming means spring on said driving means and handle.

13. A method for overcoming forces by tissue against staples in a surgical stapler having driving means and means for initiating said driving means comprising:

storing potential energy in said initiating means until said stapler is ready for stapling, then imparting said potential energy on said driving means through said initiating means.