Tool and tool holder for hand-tool apparatus

Details Tool and tool holder for hand-tool apparatus Tool and tool holder for hand-tool apparatus

1993-07-12

1995-03-14

Bishop, Steven C.

Cutting by use of rotating axially moving tool

Tool or tool with support

Including detailed shank

279 193, 279 195, 279 75, B23B 5100, B23B 3122

Patent

active

053972031

ABSTRACT:
The tool for a tool holder of hand tools used for chiseling and/or percussion drilling has a chucking shank (9). This chucking shank (9) is provided with two rotary driving grooves (10) which are located diametrically opposite one another and open axially toward the free end of the chucking shank (9). Also, the chucking shank (9) has two diametrically opposite, axially closed locking grooves (11). In order to increase the total working surface decisive for the transmission of torque, two longitudinal grooves (12) are provided which are likewise arranged diametrically opposite one another and open axially toward the free end of the chucking shank (9). The length of these longitudinal grooves (12) exceeds the length of the locking grooves (11). The axes of symmetry (L) of the longitudinal grooves (12) are arranged at an acute angle (a) to the axes of symmetry (V) of the locking grooves (11). In addition, the flanks (12a) of the longitudinal grooves on the driving side extend in a straight line and tangentially relative to the base of the locking grooves (11) so as to form optimal working surfaces for the transmission of torque.

REFERENCES:
patent: 4131165 (1978-12-01), Wanner et al.
patent: 4512692 (1985-04-01), Nielsen
patent: 4702651 (1987-10-01), Kleine
patent: 5028057 (1991-07-01), Wanner
patent: 5076371 (1991-12-01), Obermeier et al.
patent: 5174698 (1992-12-01), Obermeier

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