Ratchetable open-ended wrench

Tools – Wrench – screwdriver – or driver therefor – Sliding jaw face

Patent

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Details

81186, B25B 1312

Patent

active

055334288

ABSTRACT:
A wrench allows the user to apply sequential strokes to a rotatable element such as an hexagonal nut or bolt without removing the wrench from the element.sub.--. The wrench has a head with two jaws adapted to engage the rotatable element. A spring-mounted, retractable jaw member is linearly slidable within a slot in one of the jaws and biased toward the base of the wrench head. The retractable jaw member also has an exposed engaging surface on one side. The opposing jaw has another fixed engaging surface extending substantially parallel to the engaging surface on the retractable jaw member. The two engaging surfaces cooperate to grip a rotatable element and apply torque to the element to rotate it in one direction. On the return stroke, a relatively small amount of resistance from the rotatable element forces the retractable jaw member inward into its slot, allowing the wrench to rotate back around the element without turning it in the reverse direction.

REFERENCES:
patent: 1308440 (1919-07-01), Morrison
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patent: 2910902 (1959-11-01), Akers
patent: 2937551 (1960-05-01), Akers
patent: 3023654 (1962-03-01), Stambaugh et al.
patent: 3165015 (1965-01-01), Hinrichs
patent: 3306142 (1967-02-01), Buteau
patent: 3641847 (1972-02-01), Horton
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patent: 3881377 (1975-05-01), Evans et al.
patent: 4440047 (1984-04-01), Robbins
patent: 4637284 (1987-01-01), Rosenbaum
patent: 4787277 (1988-11-01), Myers
patent: 4889020 (1989-12-01), Baker
patent: 5131312 (1992-07-01), Macor

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