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US Patent: 136,351
Improvement in Self-Adjusting Pipe Wrenches
Patentee:
Turner Williams - Providence, RI

USPTO Classifications:
81/186, 81/99

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. Floyd Faulkner
Frank G. Parker

Patent Dates:
Granted: Feb. 25, 1873

Patent Pictures:
Turner Williams Pat. Feb. 25, 1873
USPTO pdf tiff
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Description:
Both the fixed jaw and movable jaw are curved, and the movable jaw is forced toward the fixed jaw by a spring.

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