Bit retention and release mechanism

Details Bit retention and release mechanism Bit retention and release mechanism

1988-07-26

1989-08-22

Schran, Donald R.

Chucks or sockets

Socket type

Radially reciprocating jaws

279 22, 279 80, B23B 3106

Patent

active

048589390

ABSTRACT:
A mechanism is disclosed for selectively releasing or retaining a bit in a rotary power tool. The mechanism includes a tool housing having an interior bore. A spindle, mateable with the bit, is mounted within the bore. A tubular release sleeve is also mounted within the bore, and is slidable between a retention position and release position. A bushing is positioned within the bore between the sleeve and the housing, with its exterior surface contacting the bore. A retention key is mounted within the spindle. The key is adapted to cooperate with the release sleeve to extend into a circumferential groove in the bit when the sleeve is in the retention position, and move away from that groove when the sleeve is in the release position. A spring is used to bias the release sleeve into the retention position, and a pin is mounted on the tool housing to hold the bushing within the housing.

REFERENCES:
patent: 2010210 (1935-08-01), Witt
patent: 3398965 (1968-08-01), Cox
patent: 3436086 (1969-04-01), Glenzer
patent: 3985368 (1976-10-01), Better et al.
patent: 4209182 (1980-06-01), Sheldon

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