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US Patent: 999,272
Pipe Wrench
Clinton W. Stover - Canton, OH

USPTO Classifications:
81/146, 81/185.2

Tool Categories:
wrenches : pipe wrenches


Stover Wrench Company - Canton, OH
Wright Wrench and Forging Co. - Canton, OH

E. B. Gilchrist
H. R. Sullivan
H. B. Webber
Thos. F. Turner

Patent Dates:
Applied: Mar. 27, 1911
Granted: Aug. 01, 1911

Patent Pictures: [ 1 | 2 | 3 ]
Clinton W. Stover patent August 1, 1911
USPTO pdf tiff
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A spring-tensioned sliding jaw has internal rack teeth that engage rack teeth on the main shank. The fixed and movable jaws have pipe-gripping teeth.

The specifications describe this as an improvement on wrenches of the type described in patent nos. 249,394 and 737,199.

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