Self-tightening drill chuck

Details Self-tightening drill chuck Self-tightening drill chuck

2007-03-09

2011-11-15

Gates, Eric A (Department: 3726)

Chucks or sockets

Socket type

Obliquely guided reciprocating jaws

C279S140000, C279S902000

Reexamination Certificate

active

08056906

ABSTRACT:
A drill chuck has a chuck body, a jaw holder element rotatable on the body and formed with a plurality of angularly spaced guides, and a sleeve element surrounding the holder element and body. Jaws in the guides can be shifted in the guides forward and together on rotation of the holder element in a tightening direction relative to the body and oppositely on rotation of the holder element relative to the body in an opposite loosening direction. Interengaging formations on the sleeve element and on the body limit relative angular movement of the sleeve element on the body between a pair of angularly offset end positions. An annular array of teeth rotationally fixed to the sleeve element can be engaged by a pawl angularly fixed on the holder element. A release ring rotatable the body rearward of the sleeve is rotationally coupled to one of the elements.

REFERENCES:
patent: 3970323 (1976-07-01), Schnizler, Jr.
patent: 4266789 (1981-05-01), Wahl et al.
patent: 4302021 (1981-11-01), Rohm
patent: 5499830 (1996-03-01), Schnizler
patent: 7503565 (2009-03-01), Rohm
patent: 7726663 (2010-06-01), Mack et al.
patent: 7726917 (2010-06-01), Mack
patent: 7841601 (2010-11-01), Mack
patent: 2006/0208435 (2006-09-01), Rohm
patent: 2006/111114 (2006-10-01), None

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