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US Patent: 310,818
Pipe Wrench
James F. Guthrie - Somerville, MA

USPTO Classifications:
81/167, 81/179

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


Newton Machine Company - Newton, MA

Wm. S. Bellows
H. P. Fellows
Edwin W. Brown

Patent Dates:
Applied: Mar. 28, 1884
Granted: Jan. 13, 1885

Patent Pictures: [ 1 | 2 ]
James F. Guthrie patent January 13, 1885
USPTO pdf tiff
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The primary focus of the patent is the sliding wedge jaw face on the fixed jaw.

Distinctive feature of the produced wrench is the frame for the movable jaw is integral with the handle, and the adjusting nut has a curved face to facilitate rocking movement of the hook jaw.

Marketed as Guthrie's Patent.

Corresponding Canadian patent CA-21,185 was granted Febr. 28, 1885 and British patent GB-188506601 was registered May 30, 1885.

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