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US Patent: 329,221
Pipe Wrench
Patentee:
Franz A. Schramm - Philadelphia, PA

USPTO Classifications:
81/99

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Unknown

Witnesses:
W. F. Kircher
A. P. Grant
John A. Wiedersheim

Patent Dates:
Applied: Jul. 24, 1885
Granted: Oct. 27, 1885

Patent Pictures: [ 1 | 2 ]
Franz A. Schramm patent October 27, 1885
USPTO pdf tiff
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Description:
This self-adjusting swinging hook jaw pipe wrench has a coil spring beneath a side cover plate.

A known example has appeared in a collection dispersal auction.

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