US Patent: 444,777 - Pivoted Jaw Wrench


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US Patent: 444,777

Pivoted Jaw Wrench

Patentee:

Clarence V. Greenamyer (exact or similar names) - San Francisco, CA

USPTO Classifications:

81/100

Tool Categories:

wrenches : pipe wrenches

Assignees:

Verner Wrench Car Mover & Power Manufacturing Co. - San Francisco, CA

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Aug. 07, 1890
Granted:	Jan. 13, 1891

Patent Pictures:

Clarence V. Greenamyer patent January 13, 1891

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Description:

Improvement on pat. no. 329,642, introducing an adjustable pivot point for the hook jaw. As shown in the drawings, the relationship between the hook jaw and double cam-faced head on the main shank allow tightening and loosening action without removing or re-setting the wrench.