Box end for a box end wrench

Details Box end for a box end wrench Box end for a box end wrench

1998-06-15

1999-09-07

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

81119, 811801, B25B 1300

Patent

active

059469897

ABSTRACT:
A box end of a box end wrench having a substantially .OMEGA.-shaped constraint spring rod mounted therein for stopping the workpiece in the box end, enabling the workpiece to be positively turned with the box end wrench, the constraint spring rod having two opposite ends respectively inserted into two opposite radial through holes on the peripheral wall of the box end, and an arched middle section closely attached to the inside wall of the box end for stopping the workpiece in the box end.

REFERENCES:
patent: 2727418 (1955-12-01), Moon
patent: 2751802 (1956-06-01), Ruillard
patent: 2769360 (1956-11-01), Cottrell et al.
patent: 2774259 (1956-12-01), Caulkins
patent: 4787278 (1988-11-01), Bononi
patent: 5307713 (1994-05-01), White

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