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US Patent: 219,758
Pipe-Wrench
Patentee:
Royal R. Piper - East Saginaw, MI

USPTO Classifications:
81/68

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Achilles Schehl
C. Sedgwick
A. J. Denton
J. Inglehart

Patent Dates:
Applied: Mar. 12, 1879
Granted: Sep. 16, 1879

Patent Pictures:
Royal R. Piper patent September 16. 1879
USPTO pdf tiff
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Description:
A chain wrench with a wedge-lock for the pin holding the size adjustment. The specifications note the chain and gripping teeth could be padded with leather to prevent damage to polished or plated surfaces

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