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US Patent: 440,889
Wrench
Patentee:
Amede Chainey - North Shapleigh, ME

USPTO Classifications:
81/171, 81/97

Tool Categories:
wrenches : pipe and nut combination wrenches

Assignees:
Amede Chainey - North Shapleigh, ME
Arthurq C. Watson - North Shapleigh, ME
Daniel F. Merrow - North Shapleigh, ME

Manufacturer:
Not known to have been produced

Witnesses:
Albert B. Blackwood
Jos. H. Blackwood
Daniel F. Merrow
George F. Emery

Patent Dates:
Applied: Jul. 14, 1890
Granted: Nov. 18, 1890

Patent Pictures:
Amede Chainey patent November 18, 1890
USPTO pdf tiff
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Description:
The respective pipe and nut wrench jaws slide in grooves cast in the main shank. The wrench can easily be disassembled for repair.

The patented features are the cast grooved main shank, and the spring that holds the pipe gripping jaw in position.

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