Ratcheting open end wrench

Details Ratcheting open end wrench Ratcheting open end wrench

1992-11-03

1994-02-22

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Sliding jaw face

81139, B25B 1312

Patent

active

052877779

ABSTRACT:
An open end wrench has a single movable jaw to enable a ratcheting action. The movable jaw has an arcuate stem guided in an arcuate slot in the wrench body to enable spring retraction of the movable jaw to allow rotation of the jaws past the corners of a hex fastener in the reverse motion of the wrench. The center of the arcuate slot walls is located well within a quadrant of the wrench space nearest the slot which produces a particularly smooth ratcheting action enabling snapping the wrench over the bolt or nut from any angle. The movable jaw stem immediately wedges in the slot during advancing motion of the wrench to enable wrenching forces to be applied. Vee notches in the jaw faces allow twelve increments of ratcheting action, with a slightly shallower side on each notch further facilitating the ratcheting action. A serrating of the jaw faces enables the wrench to be used as an open end pipe wrench.

REFERENCES:
patent: 2797600 (1957-07-01), Beaver
patent: 3892150 (1975-07-01), Horton

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