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US Patent: 194,488
Pipe And Nut Wrenches With Cutters
Benjamin L. Walker - Sing Sing, NY

USPTO Classifications:
30/94, 81/181, 81/184

Tool Categories:
wrenches : wrench components : pipe jaw attachments for wrenches


Not known to have been produced

Michael Ryan
Fred. Haynes
Benjamn F. Walker
John W. Horsfall

Patent Dates:
Applied: Feb. 14, 1877
Granted: Aug. 21, 1877

Patent Pictures: [ 1 | 2 ]
Benjamin L. Walker patent August 31, 1877
USPTO pdf tiff
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The patent is for the pipe wrench and cutter attachments; they are shown applied to a nut wrench corresponding to Walker's January 1, 1875 patent (no. 158,548).

The pipe jaw and cutter clamp on. The cutter jaw works in conjunction with a crank-driven block to hold the work piece against the cutting edge. The language of the specifications imply that at least working prototypes were constructed. The patent model for the cutter survives, and is installed on an all-brass model of the Walker wrench.

British patent GB-187701912 encompasses both the wrench and attachment.

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