Patent ID: 6199640
Filing Date: 2001-03-13
Classification: B25D

Abstract:
An electric machine tool for tools which operate by percussion, the electric machine tool having a machine housing; a rotatingly drivable work spindle seated in said machine housing; a tool receiver provided for receiving a tool and driven by said work spindle; a mechanical striking mechanism having a beater accelerated in an axial direction and actuating a shaft of the tool in the axial direction by means of blows; a driver unit which derives an acceleration of said beater from rotational movement, said driver unit having an axially displaceably arranged scanning member which rotates synchronously with said work spindle; two circular-shaped curved paths which guide said scanning member and are fixed in said housing, said circular-shaped curved paths having elevations and depressions, each of said elevations pointing in an axial direction of said work spindle in a direction of said scanning member.