Structure of wrench

Details Structure of wrench Structure of wrench

1995-12-05

1997-02-25

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

81DIG5, B25B 2314

Patent

active

056050810

ABSTRACT:
A wrench including an operation arm having an operation head at one end for turning a workpiece, a calibration handle connected to one end of the operation arm and turned relative to the operation arm to set the desired index number of torsion, and a lock controlled to lock the calibration handle when the desired index number is set, wherein a transparent socket is mounted around the calibration handle adjacent to the operation arm, having a lens, which magnifies the index number of torsion for accurate calibration.

REFERENCES:
patent: 3487732 (1970-01-01), Larson
patent: 3503362 (1970-03-01), Ollagnon
patent: 4348922 (1982-09-01), Harris et al.
patent: 4761989 (1988-08-01), McDevitt
patent: 4901610 (1990-02-01), Larson et al.
patent: 4905731 (1990-03-01), Tamashiro et al.

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