Hilti Aktiengesellschaft

Peter Ehe

Peter Ostermeier

Wolfgang Erdt

Marcus Flock

An arrangement for transmitting a torque from a power tool to a working tool and including a shank forming part of the working tool and having following one another, in the operational direction of the working tool, first, second, third, and fourth regions (B B B B ), at least two drive grooves ( ) extending parallel to a working tool axis over all of the shank regions (B B B B ), and at least one additional drive groove ( ) extending in third and fourth regions (B B ) of the shank ( ), with the arrangement further including a chuck ( ) having an opening ( ) for receiving the shank ( ), at least one locking element ( ) projecting into the receiving groove ( ) for engagement into the circumferential groove ( ) of the shank ( ), at least two drive dogs ( ) and an additional drive dog projecting into the receiving groove ( ) for engagement in the first drive grooves ( ) and the at least one additional drive groove ( ).

Growing community of inventors

Röns, Austria

Peter Ehe