Open-ended ratchet wrench

Details Open-ended ratchet wrench Open-ended ratchet wrench

1987-02-17

1988-09-27

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Plural pivoted jaws and handle-lever

81 97, B25B 1300

Patent

active

047732873

ABSTRACT:
An open-ended ratchet wrench characterized by a handle pivotally carrying a stationary jaw, with a toggle jaw pivotally secured to the latter. The handle includes a cam at the jaw mounting end thereof which presents camming surfaces selectively functional at operative conditions of the wrench. In this regard, one camming surface in combination with the pivotal jaw provides maximum force power during one operative condition, while another cam surface cooperates with the stationary jaw in a stop relationship. A feature of the invention is the ready sliding placement thereof into a workpiece engaging condition, where tightening and untightening of the workpiece is achieved by inverting the wrench 180.degree..

REFERENCES:
patent: 1072090 (1913-09-01), Cook
patent: 1183371 (1916-05-01), Ginsburg
patent: 1406910 (1922-02-01), Sutherland
patent: 1718719 (1929-06-01), Turner
patent: 2537838 (1951-01-01), Logan
patent: 3937550 (1960-05-01), Milentz

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