Ratchet wrench

Details Ratchet wrench Ratchet wrench

1997-06-18

1999-07-27

Scherbel, David A.

Tools

Wrench, screwdriver, or driver therefor

Pivoted outer jaw

81 94, 81 92, 81111, B25B 1300, B25B 1328

Patent

active

059271590

ABSTRACT:
A ratchet wrench including a fixed jaw and a movable jaw attached to a body of the ratchet wrench and having V-shaped nut gripping portions opposing each other. The fixed jaw is pivoted to a forward end portion of the body and biased to rotate toward the movable jaw by a spring. An adjusting nut is provided rotatably about a longitudinal center axis of the body, and an adjusting screw rod is threaded into the adjusting nut so that it is movable back and forth along the longitudinal center axis of the body by rotating the adjusting nut in one direction or the other. The movable jaw is pivoted at a rear end portion thereof to the adjusting screw rod by a guide pin which is guided along a longitudinal slot provided in the body and, the movable jaw is biased to rotate toward the fixed jaw by a spring provided between the movable jaw and the adjusting screw rod. A pivot point between the movable jaw and the adjusting screw rod is positioned on a straight line passing through apexes of the V-shaped nut gripping portions of the movable jaw and the fixed jaw upon gripping a nut therebetween.

REFERENCES:
patent: 0561274 (1896-06-01), Palmer
patent: 1454016 (1923-05-01), Steen
patent: 2198951 (1940-04-01), Roush et al.
patent: 2528814 (1950-11-01), Boyer
patent: 2708384 (1955-05-01), Mann
patent: 2800045 (1957-07-01), Mann
patent: 4913011 (1990-04-01), Ma

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