Screw spanner or wrench

Details Screw spanner or wrench Screw spanner or wrench

1980-09-30

1983-03-29

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

B25B 1346

Patent

active

043779557

ABSTRACT:
A wrench having a handle with an actuating lever arm pivoted for operation to rotate a nut engaging ring geometrically configured to accept a nut or bolt head. The nut engaging ring includes two tappets extending in the plane of rotation of the lever arm. A torque applied to the lever arm engages these tappets and thereby causes the nut engaging ring to rotate with increased force.

REFERENCES:
patent: 2875658 (1959-03-01), Benjamin
patent: 2972919 (1961-02-01), Stalkup
patent: 3019681 (1962-02-01), Grissom
patent: 3447404 (1969-06-01), Lachance
patent: 3557644 (1971-01-01), Gregory
patent: 3616714 (1971-11-01), Gregory

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