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US Patent: 165,725
Improvement in Pipe-Wrenches
Improvement in Pipe-Tongs
Lawrence Glynn - Cambridgeport, MA

USPTO Classifications:
81/129, 81/99

Tool Categories:
wrenches : pipe wrenches : pipe tongs
wrenches : wrench adjustment types : self-adjust wrenches


Not known to have been produced

Francis Allen
John R. Heard
Alban Aldren

Patent Dates:
Applied: Feb. 15, 1875
Granted: Jul. 20, 1875

Patent Pictures:
Lawrence Glynn Pat. July 20, 1875
USPTO pdf tiff
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The patent is for the combination of hook jaw, adjustable toothed jaw, and tension spring as shown in the drawing and described in the specifications. The specifications note prior art including James N. Freestone's Sept. 3, 1867 pipe tongs patent (No. 68,431).

Corresponding Canadian patent no. CA-5,164 was issued September 10, 1875.

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