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US Patent: 324,378
Pipe Wrench
James T. Hayden - Boston, MA

USPTO Classifications:
81/64, 81/90.4

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


Belden Machine Company - New Haven, CT

Eugene Humphrey
A. O. Orne
T. W. Porter
H. H. Letteney

Patent Dates:
Applied: Jan. 16, 1885
Granted: Aug. 18, 1885

Patent Pictures: [ 1 | 2 ]
James T. Hayden patent August 18, 1885
USPTO pdf tiff
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The jaws are hinged clamps held to the handle by a loop and closed by a cam on the handle. One handle would be used with several sizes of clamps. This non-marring wrench was designed for brass pipe or other pipe with a bright finish.

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