Tool bit and tool bit chuck for manually operated tools

Details Tool bit and tool bit chuck for manually operated tools Tool bit and tool bit chuck for manually operated tools

1994-12-08

1996-08-06

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Including detailed shank

279 19, 408240, B23B 5102, B23B 3122

Patent

active

055427979

ABSTRACT:
A tool for insertion into a tool bit chuck in a manually operated tool used for chiseling and/or percussion drilling includes an axially extending chucking shank (1) with a locking 1groove (2) closed at its ends spaced apart in the axial direction. The chucking shank (1) has two rotary entrainment grooves (3) each with an entrainment side flank arranged so that the entrainment side flanks are located diametrically opposite one another. One of the rotary entrainment grooves (3) extends in the axial direction through a part of another locking groove (4) in such a way that the locking of the tool bit in a chuck is improved. To increase the transmission of torque, the chucking shank (1) has at least one additional axially extending groove (5). With this groove arrangement of the chucking shank (1) the tool bit is useful with a correspondingly shaped tool bit chuck as well as with different commercially available chucks.

REFERENCES:
patent: 4107949 (1978-08-01), Wanner et al.
patent: 4943192 (1990-07-01), Lafforgue et al.
patent: 5028057 (1991-07-01), Wanner
patent: 5076371 (1991-12-01), Obermeier et al.
patent: 5324145 (1994-06-01), Kleine
patent: 5397203 (1995-03-01), Kleine et al.

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