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US Patent: 3,640,159
Adjustable Jaw Wrench
Patentees:
Kenneth F. Halls - Dallas, TX
Alfred H. Brickley - Garland, TX

USPTO Classifications:
74/457, 81/165, 81/172

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
Space Tool, Inc. - Pasadena, TX

Manufacturer:
Space Tool, Inc. - Pasadena, TX

Witnesses:
none listed

Patent Dates:
Applied: Aug. 26, 1970
Granted: Feb. 08, 1972

Patent Pictures:
Kenneth F. Halls, et. al. patent February 8, 1972
USPTO pdf tiff
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Description:
A slide drives rotation of a shaft with spiral grove; gearing transfers the motion to a worm which moves the adjustable jaw. It is a refinement of Halls' design which received patent no. 3,555,939.

The tool corresponding to this patent notes both patents.

The specifications cite prior patent numbers 594,219, 2,753,748, 3,125,911 and 3,541,899 as references.

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