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US Patent: 570,213
Chain Wrench
George Amborn, Jr. - Brooklyn, NY

USPTO Classifications:
213/208, 59/78, 81/70

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

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

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

Louis A. Wendt
William C. Redfield
Chas. H. Smith
J. Staib

Patent Dates:
Applied: Apr. 06, 1896
Granted: Oct. 27, 1896

Patent Pictures:
George Amborn Jr. Patent Oct. 27, 1896
USPTO pdf tiff
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J.H. Williams produced an extensive line of chain pipe wrenches. This patent and Amborn's parallel patent (no. 570,214) are cited on the VULCAN series of chain 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.

The focus of this patent is the type of chain used. It describes a chain composed of flat and "cable chain" links. It also describes through pins on flat links of the chain, and related hook slots in the jaws.

Aspects of this patent and parallel patent 570,214 appear in British patent GB-189623890 registered Oct. 27, 1896.

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