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US Patent: 375,712
Improvements in Pipe and Nut Wrenches
Charles E. Murray - Fairfield, VA

USPTO Classifications:
24/505, 81/409, 81/417

Tool Categories:
wrenches : wrench combination tools
wrenches : pipe and nut combination wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Charles E. Murray - Fairfield, VA
Thompson W. Lambert - Avis, VA

Not known to have been produced

J. W. Wadely
James Steele
F. L. Ourand
Benj. G. Cowl

Patent Dates:
Applied: May 17, 1887
Granted: Dec. 27, 1887

Patent Pictures:
Charles E. Murray patent December 27, 1887
USPTO pdf tiff
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The mechanism is a hybrid combination of tongs and sliding jaw. A sliding block is the pivot point for a lever with the movable jaw, and also has a flat jaw surface. The sliding block has interior teeth which can be engaged with rack teeth on the shank, and fixed in place by a thumb screw. The whole sliding block and lever structure can be slid off the shank to allow the fixed jaw and shank to serve as a hammer.

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