Tool for a dismantlable medical instrument

Patent metadata

Field	Value
Publication number	US-10206756-B2
Application number	US-201615164942-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	May 26, 2015
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

A tool for a dismantlable medical instrument includes a first component, which surrounds a cavity for receiving a distal end of a shank, and a second component with a catch, which protrudes into the cavity surrounded by the first component to form a bayonet connection with a distal end of a shank protruding into the cavity, by engagement of the catch in a slit or a groove at the distal end of the shank. The first component has a recess into which the second component is fitted.

First claim

What is claimed is:

1. A tool for a dismantlable medical instrument having a shank, the tool comprising:
a first component that surrounds a cavity for receiving a distal end of the shank;
a second component with a catch that protrudes into the cavity surrounded by the first component to form a bayonet connection, the distal end of the shank configured to protrude into the cavity by engagement of the catch in a slit or a groove at the distal end of the shank; further wherein the second component includes a ring-shaped portion and wherein the catch protrudes from the ring-shaped portion in an axial direction of the second component; and
a recess formed in the first component into which the second component is fitted, the recess being open at an exterior surface of the first component and being open at an opposing interior surface of the first component, such that, in a radial direction of the first component, the recess forms a through-hole.

2. The tool according to claim 1 , wherein the first component comprises a bearing for the movable mounting of a branch or another movable component of the tool.

3. The tool according to claim 1 , wherein, in an axial direction of the first component, the recess on the first component is a slit that is open at a proximal end of the first component, wherein the catch is inserted into the recess from the proximal direction and is secured in the recess.

4. The tool according to claim 1 , wherein the catch is cohesively bonded to an edge of the recess.

5. The tool according to claim 1 , wherein the second component comprises an annular area arranged proximally in relation to the catch.

6. The tool according to claim 5 , wherein the annular area of the second component is joined to a proximal edge of the first component.

7. The tool according to claim 1 , further comprising:
a transmission mechanism for transmitting a force to a branch or to another movable component of the tool; and
a locking projection on the transmission mechanism for engaging in the slit or the groove at the distal end of the shank inserted into the cavity in the first component to lock a bayonet connection between the tool and the shank.

8. The tool according to claim 7 , wherein the transmission mechanism comprises:
a rod or a tube with a slit at a distal end of the rod or tube; and
an endpiece with a bearing at the distal end of the endpiece for an articulated mechanical coupling to a movable component of the tool,
wherein a proximal end of the endpiece is inserted into the slit at the distal end of the rod or tube and is joined thereto, and
wherein an area of the proximal end of the endpiece, protruding laterally from the slit at the distal end of the rod or tube, forms the locking projection.

9. The tool according to claim 8 , wherein the first component includes an interior wall, the interior wall having a bore extending therethrough, the bore having a contour that corresponds to the rod or the tube and the locking projection of the transmission mechanism, such that the rod or the tube and the locking mechanism can be axially inserted through the bore.

10. A dismantlable medical instrument comprising: the shank; and the tool according to claim 1 .

11. A medical instrument according to claim 10 , wherein the shank comprises:
a shank tube;
an L-shaped slit or an L-shaped groove at the distal end of the shank tube; and
a support tube at the distal end of the shank for mechanically supporting and reinforcing the distal end of the shank tube,
wherein the support tube is arranged inside the shank tube.

12. The medical instrument according to claim 11 , wherein the support tube has a slit or a groove for receiving a locking projection on a transmission mechanism.

13. The tool according to claim 1 , wherein the first component is a single, monolithic component.

Assignees

• Storz Karl Gmbh & Co Kg
• Storz Karl Se & Co Kg

Inventors

• Kaercher Daniel
• Stefan Jochen

Classifications

• A61B17/29 Primary

  Forceps for use in minimally invasive surgery · CPC title

• A61B2017/2931

  with releasable head · CPC title

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title

• A61B2017/00296

  mounted on an endoscope · CPC title

• A61B90/08 Primary

  Accessories or related features not otherwise provided for · CPC title