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

1994-12-09

1996-06-25

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

055294448

ABSTRACT:
A tool bit for insertion into a tool bit chuck in a manually operated tool used for chiseling and/or percussion drilling has an axially extending chucking shank (1). The chucking shank has two axially extending rotary entrainment grooves (2) open at its end inserted into the chuck and located diametrically opposite one another. In addition, the chucking shank (1) has a locking groove (3) closed at its ends extending transversely of the axial direction and serving to lock the tool bit in the axial direction. Further, the chucking shank (1) has an axially extending groove (4) and an additional axially extending groove (5) for providing greater surface areas in entrainment side flanks for transmitting torque. The axially extending groove (4) extends through a part of the locking groove (3) so that an end face (3a) is formed extending transversely of the axial direction. The additional axially extending groove (5) is located diametrically opposite the locking groove (3) and has a larger transverse cross-sectional area than the rotary entrainment grooves (2).

REFERENCES:
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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