US Patent: 219,758 - Pipe-Wrench


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US Patent: 219,758

Pipe-Wrench

Patentee:

Royal R. Piper (exact or similar names) - 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:

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

Patent Pictures:

Royal R. Piper patent September 16. 1879

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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