Patent ID: 7655020

Claim:
A surgical punching instrument, comprising: a punching bar, said punching bar having a punching bar groove at a distal end thereof; a fixed handle integrally attached to said punching bar; an actuating lever pivotably movably mounted on said handle; a punching slide having a punching slide groove at a distal end thereof, wherein said punching slide lies with a flat sliding surface over its entire length on a flat guiding surface of said punching bar and is guided at said punching bar in an axially movable manner by means of guide elements, said guide elements having a T-shaped profile, said guide elements detachably engaging one another in a positive-locking manner, said guide elements being detachable from one another via a longitudinal displacement such that said punching slide is removed from said punching bar in a detached state; a short lever arm connected to said actuating lever and connected to said punching slide; a restoring spring acting on said punching slide; a guide shaft, said punching bar groove and said punching slide groove defining a cavity when said punching slide is connected to said punching bar, said restoring spring being provided as a compression coil spring arranged and guided at least partially in said groove of said punching slide by means of said guide shaft passing through said restoring spring axially, said guide shaft being coaxially arranged with said guide groove of said punching slide, said guide shaft having a distal stop face rigidly connected to said punching slide, a rear spring end of said restoring spring bearing on said distal stop face, said punching bar having a proximal stop face and said punching slide having a proximal stop face, said restoring spring having a front end adjacent to said proximal stop face of said punching slide when said punching slide is removed, said spring being arranged in said cavity such that one portion of said spring is located in said groove of said punching slide and another portion of said spring is located in said groove of said punching bar when said punching slide is mounted to said punching bar, wherein a front end of said spring is opposite said proximal stop face of said punching bar and said proximal stop face of said punching bar when said punching bar is mounted to said punching slide, said short lever arm being in contact with said distal stop face when said punching slide is connected to said punching bar, said short lever arm not being in contact with said distal stop face when said punching slide is detached from said punching bar in said detached state.