Adjustable socket wrench

Details Adjustable socket wrench Adjustable socket wrench

1989-03-06

1990-03-27

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Sliding jaw, cam-closing

279 69, B25B 1318

Patent

active

049110403

ABSTRACT:
An improved adjustable socket wrench comprising a bifurcated base member having a threaded external surface, a plurality of elongated gripping arms having upper and lower apertures formed in said arms, a parallellogram linkage system connecting said gripping arms to said base member and serving to maintain said gripping arms in parallel relationship during movement, resilient means normally urging said linkage system and said gripping arms to a raised open position, and nut means mating with the threaded surface of said base member and serving to drive said linkage system and said gripping arms against the action of said resilient means to a clamping position.

REFERENCES:
patent: 1817988 (1931-08-01), Klamt
patent: 2631485 (1953-03-01), Stuart et al.
patent: 2745305 (1956-05-01), Reiffin
patent: 3373639 (1968-03-01), Van Dalen et al.
patent: 3898897 (1975-08-01), Jauhiainen
patent: 4385534 (1983-05-01), Nichols

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