Patent ID: 6669206
Filing Date: 2003-12-30
Classification: B25D,Y10T

Abstract:
A tool holder for a rotary hammer or chisel hammer, comprising:a main body defining a receiving opening for the shank of a drill tool having at least one axial groove closed at both ends, at least one axially extending, elongate through-opening defined by the main body, a locking element located in the through-opening and having a smaller axial length than the through-opening, which locking element in a locked position is supported against outward radial displacement and when the drill tool is inserted, engages in the at least one axial groove thereof and, which in one of a first release position and a second release position is displaceable radially outwards relative to the locked position, a supporting ring, which is axially movable between a first position supporting the locking element in the locked position and a second position defining the first release position of the locking element, and the locking element comprises a shaped element which, on its radially outer side, has a single projection lying between a first recess formed at a front edge of the locking element and a second recess formed at a rear edge of the locking element, the supporting ring has a radially inner side including a single projection lying between a first recess formed at a front edge of the supporting ring and a second recess formed at a rear edge of the supporting ring, wherein the shape of the projection of the supporting ring matches the shape of the recesses in the locking element and the shape of the projection of the locking element matches the shape of the recesses in the supporting ring, and wherein in the locked position the projection of the locking element abuts the projection of the supporting ring and, in the release position of the locking element, a part of the projection of the locking element is received in one of the recesses of the supporting ring.