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US Patent: 553,015
Pipe Wrench
Patentee:
Elba Pember - Pemberville, OH

USPTO Classifications:
81/99

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

Assignees:
Elba Pember - Pemberville, OH
C. O. Potter - Pemberville, OH

Manufacturer:
Not known to have been produced

Witnesses:
John S. Hoyman
O. M. Gosnell
R. M. Smith
Thos. W. Riley

Patent Dates:
Applied: Sep. 20, 1895
Granted: Jan. 14, 1896

Patent Pictures:
Elba Pember patent January 14, 1896
USPTO pdf tiff
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Description:
The spring holds the swinging jaw in engagement with the work piece. Pressing on the spring disengages the grip. The construction enables one-handed operation, and the wrench will operate in vertical or horizontal positions.

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