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US Patent: 74,697
Improvement in Pipe-Tongs
William Kenyon, Jr. - Steubenville, OH

USPTO Classifications:
257/E21.17, 257/E21.582, 81/98

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

Henry K. Kenyon - Steubenville, OH
William Kenyon, Jr. - Steubenville, OH

Wm. Kenyon & Sons - Steubenville, OH

R. C. Hoffman
Robert Martin
Thos. B. Kerr
G. B. Cushing

Patent Dates:
Granted: Feb. 18, 1868

Patent Pictures:
William Kenyon, Jr. Pat. Feb. 18, 1868
USPTO pdf tiff
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The curve of the fixed jaw and the curved and straight edges of the swinging jaw are proportioned so that the jaws make three points of contact with any round object that are within its range of sizes. The patent claims the bifurcated hook jaw and the "eccentric cam head."

This patent was noted in the specifications for patent no. 187,928.

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