Self-tightening drill chuck

Details Self-tightening drill chuck Self-tightening drill chuck

2007-05-29

2010-06-01

Gates, Eric A (Department: 3726)

Chucks or sockets

Socket type

Obliquely guided reciprocating jaws

C279S125000, C279S140000, C279S902000

Reexamination Certificate

active

07726663

ABSTRACT:
A drill chuck has a chuck body, a holder body, and a front sleeve surrounding the bodies, with jaws between them. A ring of teeth on one of the bodies can be engaged by a pawl angularly fixed on the other of the bodies. When engaged, the pawl and the array of teeth allow rotate relative to the chuck body in a tightening direction but not in a loosening direction. Respective interengaging stops on the other body and on the front sleeve limit relative angular movement of the front sleeve on the other body between a pair of angularly offset end positions. A back control sleeve has a cam formation engageable with the pawl in only one of the end positions to hold the pawl in the freeing position. The pawl is biased by a spring in the other end position into the locking position.

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Random House Dictionary, retrieved from http://dictionary.reference.com on Jan. 28, 2009.

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