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US Patent: 764,619
Pipe Wrench
James C. McQuilkin - Industry, PA

USPTO Classifications:

Tool Categories:
wrenches : pipe wrenches


James C. McQuilkin - Beaver Falls, PA

Wm. H. Ourand
J. W. Mister
J. A. Neville
J. D. Strock

Patent Dates:
Applied: Sep. 25, 1903
Granted: Jul. 12, 1904

Patent Pictures:
James C. McQuilkin patent July 12, 1904
USPTO pdf tiff
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The adjusting nut and movable jaw move along a threaded shaft that has pivoting attachment to the frame at the head holding the "fixed jaw." The head includes a spring which holds the movable jaw engaged with the work piece.

Known examples marked "Quick Release / Pat'd 7-12-04 / Beaver Falls, PA" have the entire handle and body formed of bent stamped sheet metal; there is a strengthening core in the handle beyond the adjustment limit of the movable jaw.

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