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US Patent: 952,860
Chain Pipe-Wrench
George Amborn - New York, NY

USPTO Classifications:

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

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

Not known to have been produced

James H. San Jule
Horace A. Bodge
Fred White
Rene Bruine

Patent Dates:
Applied: Apr. 02, 1908
Granted: Mar. 22, 1910

Patent Pictures:
George Amborn patent March 22, 1910
USPTO pdf tiff
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The patent describes a chain wrench with double reversible jaw faces, and the hook provision for the free end of the chain formed wholly or in part on the handle. The patent includes multiple hook points so adjustments in increments less than the length of successive links can be made. The VULCAN BIJAW chain wrench introduced in early 1910 may incorporate features of this patent.

The patent is referenced in Amborn's subsequent patents (i.e. nos. 1,014,931, 1,146,119 and 1,146,120.

Arthur C. Fraser, patent attorney

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