Patent ID: 7637327

Claim:
A percussive tool, in particular for surgical use, comprising a drive part ( 3 ) and a tool holder ( 25 ), which is linked to the drive part ( 3 ) and is arranged on a front side of the drive part ( 3 ), the drive part ( 3 ) being designed so as to exert oscillatory forces, acting in an axial direction (A), on the tool bit holder ( 25 ), characterized in that the percussive tool has a longitudinal opening provided by a through longitudinal hole extending in the axial direction (A) through the tool bit holder ( 25 ) and the drive part ( 3 ) from the front side of the percussive tool to a back side of the percussive tool for passage of a rod-shaped component, wherein the drive part ( 3 ) has a piston ( 4 ) that is driven to undergo oscillatory movements, the longitudinal opening extending through the piston ( 4 ), the tool bit holder ( 25 ) is linked to the drive part ( 3 ) by way of a drive member ( 17 ), the longitudinal opening extending through the drive member ( 17 ), wherein the drive member ( 17 ) has a enlargement ( 16 ), which is arranged in a cavity ( 15 ) in the interior of the piston ( 4 ), the longitudinal opening passing through the cavity ( 15 ) and an opening ( 104 ), behind the cavity, in the piston ( 4 ) and, in particular, the cavity ( 15 ) being sealed from a cylinder chamber ( 6 ), in which the piston ( 4 ) is situated, by means of a seal ( 20 ).