Articulated gripping box wrench for tight spaces

Details Articulated gripping box wrench for tight spaces Articulated gripping box wrench for tight spaces

1995-02-06

1997-03-04

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Double-ended, simultaneous adjustment

81128, B25B 1310

Patent

active

056068964

ABSTRACT:
A gripping box-wrench for engaging and torquing either undistorted or stripped nuts and bolts in tight spaces. A separate cam lever articulated from the wrench engages a rotatably-retained cam to apply a gripping force within a thin-wall polygonally-fluted box structure engaging a polygonal workpiece such as a hexagonal nut or bolt. Being applied by means of a separate cam lever, the gripping force may be varied independently of or proportionately with the torquing moment applied to the workpiece to increase the gripping force as necessary to retain engagement of a workpiece too distorted for torqueable engagement with the box structure. An undistorted nut or bolt may be engaged and torqued in the usual manner without requiring a gripping force. The box-end has a thin-walled geometry suitable for engaging workpieces in tight spaces.

REFERENCES:
patent: 2486523 (1949-11-01), Deschenes
patent: 3363490 (1968-01-01), Maichen
patent: 3611843 (1971-10-01), Engel
patent: 3858465 (1975-01-01), Lind
patent: 4174646 (1979-11-01), Kotler
patent: 4325275 (1982-04-01), Colvin

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