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US Patent: 590,853
Pipe Wrench
Improvements in Pipe-Grips
Patentee:
Homer Parmelee - Philadelphia, PA

USPTO Classifications:
81/90.5

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
John G. Hippenstiel
Albert S. Alexander
William E. Stokes
Chas. H. Bannard

Patent Dates:
Applied: Feb. 24, 1897
Granted: Sep. 28, 1897

Patent Pictures:
Homer Parmelee patent September 28, 1897
USPTO pdf tiff
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Description:
The patent is an improvement on Parmelee's March 6, 1888 patent (no. 379,123). The patent adds a motion limit stop to prevent breaking the hinge pins connecting the arc segments. A slide on the back of the handle replaces the original spring to keep the ends of the grip in place on the handle.

Supplanted by later Parmelee patents (nos. 648,706 and 871,436).

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