Adjusting device for a hand-held tool

Details Adjusting device for a hand-held tool Adjusting device for a hand-held tool

2008-05-23

2009-10-27

Shakeri, Hadi (Department: 3727)

Tools

Wrench, screwdriver, or driver therefor

Slidable jaw adjustments

C081S057440, C081S301000

Reexamination Certificate

active

07607373

ABSTRACT:
A hand tool device incorporates a fluid operated mechanism actuable by a plunger pressurizing a reservoir to force fluid past a resiliently biased valve to a fluid filled cylinder accommodating a piston carrying a contact member for clamping a work piece in the manner of an adjustable wrench or pliers. Continued operation of the plunger increases the pressure applied to the work piece.

REFERENCES:
patent: 1271365 (1918-07-01), Reynolds, Jr.
patent: 1675979 (1928-07-01), Laird
patent: 4031619 (1977-06-01), Gregory
patent: 4351097 (1982-09-01), Hashimoto et al.
patent: 4492106 (1985-01-01), Amighini
patent: 4689957 (1987-09-01), Gallentine
patent: 4957021 (1990-09-01), Helton
patent: 5113679 (1992-05-01), Ferraro et al.
patent: 6973857 (2005-12-01), Anderson

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