Medical tongs

• US 5,817,128 A
• Filed: 10/06/1995
• Issued: 10/06/1998
• Est. Priority Date: 03/10/1993
• Status: Expired due to Term

• Current Assignee: Karl Storz Se & Co. Kg
• Original Assignee: Karl Storz Se & Co. Kg
• Inventors: Storz, Karl
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US08/513,939
• Time in Patent Office: 1,096 Days
• Field of Search: 606/205, 606/170, 606/206, 606/207, 606/51, 606/52, 600/564, 600/565
• US Class Current: 606/205
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 2017/292 connection of actuating rod to handle, e.g. ball end in recess
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft
• CPC Class Codes: A61B 2017/293 with means preventing relative rotation between the shaft and the actuating rod
• CPC Class Codes: A61B 2017/2931 with releasable head
• CPC Class Codes: A61B 2018/1422 Hook

Abstract

Disclosed are medical tongs, in particular, for use in endoscopic surgery, having

a handpiece, provided with a stationary and a movable handle,

an external tube, which is connected to the stationary handle, and

inside the external tube a moveably guided draw-rod, which actuates at least one of the two tong elements of the tong jaws and which is connected to the movable handle.

The present invention is distinguished by a bayonet element, which can be inserted into a bayonet insert inside the external tube and to which at least one of the tong elements is joined, being borne at the distal end of the draw-rod in such a manner that it can be moved relative to the draw-rod, and by being able to connect the external tube having the inserted draw-rod to the handpiece via a connection element with the proximal end of the draw-rod locking into a spring catch in the movable handle.

Claims

1. Medical tongs, in particular, for use in endoscopic surgery, having:

a pair of tong elements (41,42);

a handpiece (1), provided with a stationary and a movable handle (11,12);

an external tube (2), which is connected to said stationary handle (11); and

inside said external tube (2) a movable guided draw-rod (3), which actuates at least one of said two tong elements (41,42) which is connected to said movable handle (12), characterized by a bayonet element (31), which can be inserted into a bayonet insert (24) inside said external tube (2) and to which at least one of said tong elements (4,

     42) is joined, being borne on the distal end of said draw-rod (3) in such a manner that it can be moved relative to said draw-rod, and further characterized in said external tube (2) a spring clamp element (14,15) is provided which engages said draw-rod (3) in a formfitting manner when said handpiece is attached, said spring clamp element comprising a flat region on said draw-rod, a pair of clamp elements adapted to engage said flat region and a flat portion of said external tube to hold the draw-rod and external tube against relative rotation while permitting their axial relative movement, and an encircling spring holding the clamp elements against the draw tube, while being fitted in said fixed handle.

2. Tongs according to claim 1, characterized by being able to connect said external tube (2) having said inserted draw-rod (3) to said handpiece (1) via a connection element (13,21), with the proximal end of said draw-rod (3) locking into a catch (51) in said movable handle (12) of said handpiece (1).

3. Tongs according to claim 2, characterized by being able to move said catch (51) on said movable handle (12) by means of an actuating element (5) in such a manner that the opening of the tong jaws (4) can be set.

4. Tongs according claim 2, characterized by the connection element which connects said external tube (2) to the handpiece (1) being a screw element (13, 21).

5. Tongs according to claim 2, characterized by said external tube (2) being rotatable relative to a part (21) of said connection element attached to said handpiece (1).

6. Tongs according to claim 5, characterized by being able to set defined rotational positions between said external tube (2) and said handpiece (1).

7. Tongs according to claim 6, characterized by a ball/catch connection defining said rotational positions.

8. Tongs according to claim 1, characterized by said draw-rod (3) having at its proximal end section two flat sections (32) which face each other and into which said spring clamp element (14, 15) of said external tube (2) engages in a formfitting manner.

9. Tongs according to claim 1, characterized by both said tong elements (41, 42) being movable.

10. Tongs according to claim 9, characterized by said tong elements (41, 42) being connected to said draw-rod via pivotal elements (43, 44).

11. Tongs according to claim 1, characterized by said external tube (2) being composed of a metallic internal tube and a jacket tube made of an insulating material.

12. Tongs according to claim 11, characterized by said jacket tube made of an insulating material being connected to the actual tongs via a bayonet joint.