Patent ID: 6675908
Filing Date: 2004-01-13
Classification: B25D

Abstract:
A drill hammer or riveter, comprising a housing (11) wherein a hammering mechanism (12) is accommodated in the housing, wherein, in an axially displaceably supported guide tube (13), the hammering mechanism has a reciprocating piston (16) and a striker (17), drivable by means of the piston (16) via an air cushion, wherein the hammering mechanism (12) is moveable out of an idling position into a hammering position by means of an axial displacement of the guide tube (13), wherein the guide tube (13) is urged by a restoring spring (27) in a direction of the idling position with a restoring force, wherein between the guide tube (13) and the housing (11), at least one damping or spring member (30, 36, 37) is provided, wherein, in the hammering position of the guide tube (13), the at least one damping or spring member has either a spring or damping characteristic between the guide tube (13) and the housing (11) that deviates from the restoring spring (27) in the region of the idling position.