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US Patent: 530,518
Combined Monkey and Pipe Wrench
Samuel M. Friede - St. Louis, MO

USPTO Classifications:
123/145R, 81/165, 81/173

Tool Categories:
wrenches : pipe and nut combination wrenches

Samuel M. Friede - St. Louis, MO
John W. Donnell - St. Louis, MO

Star Wrench Company - St. Louis, MO

Benjamin A. Knight
Wm. A. Scott
A. M. Ebersole

Patent Dates:
Applied: Jan. 29, 1894
Granted: Dec. 11, 1894

Patent Pictures: [ 1 | 2 ]
Samuel M. Friede patent December 11, 1894
USPTO pdf tiff
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A central movable jaw with its adjusting nut has a smooth upright surface facing a smooth upright jaw on one side, and a tapered surface facing a toothed upright jaw face on the other side.

Features of the wrench appear in earlier Friede adjustable angle wrench patents (nos. 525,318, 525,683, and 525,684).

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