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US Patent: 367,786
Pipe Wrench
Improvement in Pipe-Tongs
Patentee:
Edward O. Carvin (exact or similar names) - Corvallis, OR

USPTO Classifications:
30/190, 81/185.1, 81/383, 81/423, 81/427

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
F. McArdle
C. Sedgwick
J. W. Rayburn
E. Marple

Patent Dates:
Applied: Oct. 05, 1886
Granted: Aug. 09, 1887

Patent Pictures:
Edward O. Carvin patent August 9. 1887
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Description:
The swinging hook jaw is connected to the handle by a linking rod. The wrench also has a replaceable gripping jaw face on the main bar.

According to Ken Cope's "American Wrench Makers 1830-1930," Carvin produced this wrench at Berryville, Ca.

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