Tools – Wrench – screwdriver – or driver therefor – Sliding jaw – handle-lever grip
Patent
1994-09-22
1997-11-04
Little, Willis
Tools
Wrench, screwdriver, or driver therefor
Sliding jaw, handle-lever grip
81129, 81135, 81156, B25B 1312
Patent
active
056828020
ABSTRACT:
A wrench of the type having one handle produced by the manufacturing processes of drop forging and machining, incorporating a pivot point that acts as a fulcrum for a cam member that is integral with a wormwheel segment. The cam member terminates in the recess of a moveable jaw member which provides the surface for the cam to advance or retrack the jaw member toward or away from a fixed jaw that is integral with the handle member. The wormwheel is meshed with a worm gear member that can be rotated, advancing or retracking the moveable jaw member toward or away from a fixed jaw that is integral with the handle member. The worm gear member can be activated directly by hand, activated by hand through a long slender shaft connected and passing through the wormgear both of which are aligned with the longitudinal axis of the handle, by rotating a knob at the distal end of the shaft terminating near the end of the handle or activated by an assembly of electrical components in the handle member that are energized by a rechargeable battery. A slot in the recesses of the fixed jaw end of the handle translates the rotation of the integral cam and wormwheel member about the pivot point into linear components when the worm gear member rotates clockwise or counterclockwise thereby translating the moveable jaw either toward or away from the fixed jaw member.
REFERENCES:
patent: 811885 (1906-02-01), Webb et al.
patent: 850760 (1907-04-01), Kirk
patent: 1172319 (1916-02-01), Sullivan
patent: 2499609 (1950-03-01), Riordan
patent: 3290970 (1966-12-01), De Lucia
patent: 4156368 (1979-05-01), Jackson
patent: 4706528 (1987-11-01), Inoue
patent: 5095782 (1992-03-01), Galea
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