Break-out device for studs

Details Break-out device for studs Break-out device for studs

1991-10-07

1992-10-06

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Stud-removal and implacement

81128, 279 71, B25B 1350

Patent

active

051521954

ABSTRACT:
A device for gripping a stud to unscrew the stud includes a tubular housing. The housing has an axial bore with a plurality of cam surfaces formed in the bore. A cage is carried in the bore. The cage has a number of windows, each located adjacent one of the cam surfaces. A jaw is carried in each window of the cage. Each jaw has an outer side that mates with one of the cam surfaces and an inner side containing teeth for gripping the stud. The cam surfaces will move each jaw radially between inner and outer position when the housing rotates relative to the cage. A spring urges the jaws to the outer position.

REFERENCES:
patent: 2582444 (1952-01-01), Lucht
patent: 2701724 (1955-02-01), Harris
patent: 4724730 (1988-02-01), Mader et al.
patent: 4856386 (1989-08-01), Rodriguez

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