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US Patent: 7,362
Revolving-Jaw Wrench
Nathaniel Colver - Boston, MA

USPTO Classifications:

Tool Categories:
wrenches : nut wrenches
wrenches : wrench components : wrench adjustment locks

Colver and Dambrell - Boston, MA

Not known to have been produced

Samuel Nicolson
R. H. Eddy

Patent Dates:
Granted: May 14, 1850

Patent Pictures:
Nathaniel Colver patent May 14, 1850
USPTO pdf tiff
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The adjustable jaw has faces parallel to the end jaws, and with the faces differing in distance from the end jaws by 1/2 the thread pitch. In operation the adjustable jaw is turned, and the adjustment held by an internal spring loaded key which fits in a slot cut in the side of the threaded shank, and engages a notch in the female threads of the adjustable jaw.

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