B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
B23B 31/00 (2006.01) B23B 51/00 (2006.01) B25D 17/08 (2006.01)
Patent
CA 2100488
The tool for a tool holder of hand tools used for chiselling and/or percussion drilling has a chucking shank. This chucking shank is provided with two rotary driving grooves which are located diametrically opposite one another and open axially toward the free end of the chucking shank. Also, the chucking shank has two diametrically opposite, axially closed locking grooves. In order to increase the total working surface decisive for the transmission of torque, two longitudinal grooves are provided which are likewise arranged diametrically opposite one another and open axially toward the free end of the chucking shank. The length of these longitudinal grooves exceeds the length of the locking grooves. The axes of symmetry of the longitudinal grooves are arranged at an acute angle to the axes of symmetry of the locking grooves. In addition, the flanks of the longitudinal grooves on the driving side extend in a straight line and tangentially relative to the base of the locking grooves so as to form optimal working surfaces for the transmission of torque.
Kleine Werner
Lange Wolfgang
Meinke Holger
Schulz Reinhard
Gierczak Eugene J. A.
Hilti - Aktiengesellschaft
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