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US Patent: 570,214
Chain Wrench
George Amborn, Jr. - Brooklyn, NY

USPTO Classifications:

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

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

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

Chas. H. Smith
J. Staib
Geo. M. Van Doorn
William C. Redfield

Patent Dates:
Applied: Jun. 01, 1896
Granted: Oct. 27, 1896

Patent Pictures:
George Amborn Jr. patent October 27, 1896
USPTO pdf tiff
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J. H. Williams & Co. produced an extensive variety of chain pipe wrenches. This patent and Amborn's parallel patent (no. 570,213) are cited on VULCAN chain pipe wrenches. Williams' chain wrenches incorporated aspects of multiple patents, and in the absence of patent markings on the tools or patent citations in advertising, etc. it is a challenge to connect features of the tools to specific patents.

This patent's focus is the fixed connection between the chain and handle, and other modifications related to the use of "cable chain."

Corresponding Canadian patent no. CA-54,446 was issued December 26, 1896.

Aspects of this patent and parallel patent 570,213 appear in British patent GB-189623890 registered Oct. 27, 1896.

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