Patent ID: 8142474
Filing Date: 2012-03-27
Classification: A61B

Abstract:
1. A tubular shaft instrument for gripping and/or coagulating and/or separating tissue, comprising: a tubular shaft; a first and a second mouth part on a distal end of the tubular shaft each having at least one clamping surface; at least one articulation for rotatably supporting the mouth parts in such a manner that the mouth parts may be brought from an open position into a closed position in order to fix the tissue using the clamping surfaces; and a strip that can be displaced substantially linearly for opening and closing of the first mouth part, the strip being attached by means of a resilient end section to the first mouth part, wherein the articulation includes a slotted guide system, wherein the slotted guide system is configured so that a virtual fulcrum of the articulation is located at a distance from the longitudinal axis of the tubular shaft and the distal end of the first mouth part is displaceable away from the distal end of the tubular shaft on opening the mouth parts, and wherein the first mouth part rotates around the virtual fulcrum on opening of the first mouth part.