Tool holder for a hammer drill

Details Tool holder for a hammer drill Tool holder for a hammer drill

E - Fixed Constructions

21

B

255/41

E21B 12/00 (2006.01) B23B 31/12 (2006.01) B25D 17/08 (2006.01)

Patent

CA 1179672

ABSTRACT OF THE DISCLOSURE In a tool holder for securing a tool in a hammer drill in a form-locking manner, locking elements are radially displaceably mounted in a guide member. An adjustment ring is threaded onto the guide member and by rotating the adjustment ring relative to the guide member, the locking elements can be adjustably tightened or loosened. The locking elements seat in closed end recesses in the shank of the tool to be secured. The adjustment ring can be locked in different rotational positions by an interlocking tooth arrangement. Teeth are provided on the adjustment ring and on a fixing sleeve axially slidable positioned on the guide member. The fixing sleeve can be moved axially between a position for locking the adjustment ring and another position permitting the adjustment ring to be rotated relative to the guide member. The, surface on the adjustment ring adjustably positioning the locking elements is frusto- conically shaped so that the locking elements are radially displaceable for engaging tool shanks of different diameters.

409168

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