Title:
SCREW SPANNER
Document Type and Number:
Japanese Patent JPS5656390
Kind Code:
A
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.
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Inventors:
JIYOAN MIYUURAA
Application Number:
JP14036380A
Publication Date:
May 18, 1981
Filing Date:
October 07, 1980
Export Citation:
Assignee:
WAGNER PAUL HEINZ
International Classes:
B25B17/00; B25B13/04; B25B17/02; B25B23/142; B25B23/16; (IPC1-7): B25B13/04; B25B23/142