Patent ID: 8414610

Claim:
A surgical instrument comprising: a gripping part; a tubular guide housing having a guide hole, said gripping part being arranged stationarily on said tubular guide housing; a plunger; a mounting housing having a ring shoulder for axial fixation in said guide hole of said guide housing, said ring shoulder having a first groove on a circumference thereof, said first groove forming an axial groove extending, in an axial direction of said mounting housing and said first groove extending from a free end of said ring shoulder and said first groove leading into a second groove, said second groove forming an at least partially circumferential ring groove, said at least partially circumferential ring groove forming an axial boundary of said ring shoulder defining an axial length of said ring shoulder; a tool; an axial compression spring; an actuating lever with a lever arm, said actuating lever being mounted pivotably on said guide housing and in functional connection with said plunger, said plunger being axially shiftable in said mounting housing via said lever arm and via which said tool can be actuated, wherein said plunger has an end area located adjacent to said lever arm with a circumferential radially expanded pushbutton, said pushbutton for guiding said plunger axially shiftably in said guide hole of said guide housing against a spring force of said axial compression spring; a stop pin forming a stop section, said stop section projecting stationarily, radially inwardly in said guide hole, and dimensions of said axial groove are coordinated with dimensions of said stop section of said stop pin such that said axial groove of said ring shoulder can be pushed beyond said stop section into said guide hole and can be axially locked in said guide hole by said stop section by a rotation about an axis of said guide hole, said ring shoulder having at least one locking depression extending towards and leading into said ring groove, said locking depression for causing said stop section to engage in a stationary manner to fix a relative angular position of said mounting housing in relation to said guide housing and to said gripping part.