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US Patent: 1,327,309
Chain Pipe Wrench
George W. Bufford - Buffalo, NY

USPTO Classifications:

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

J. H. Williams & Co. - Brooklyn, NY

Not known to have been produced

René Bruine

Patent Dates:
Applied: Mar. 14, 1918
Granted: Jan. 06, 1920

Patent Pictures:
George W. Bufford patent January 6, 1920
USPTO pdf tiff
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The patented feature is the swivel in flat link chain which facilitates use in certain constrained locations. The specifications note separate patent applications for other aspects of the wrench.

The arc-shaped gripping face [see pat no. 1,416,685] appeared in the Williams FALCON chain wrench.

Fraser, Turk & Myers - patent attorneys

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