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US Patent: 547,653
Pipe Wrench
William H. Burr - Philadelphia, PA
S. Lloyd Wiegand - Philadelphia, PA

USPTO Classifications:
74/164, 81/90.5

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches


Not known to have been produced

Lacey A. Cadwallader
Cyrus R. Morgan M.D.

Patent Dates:
Applied: Jan. 11, 1895
Granted: Oct. 08, 1895

Patent Pictures:
William H. Burr and S. Lloyd Wiegand patent October 8, 1895
USPTO pdf tiff
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The three-part gripping sleeve was designed for non-marring grip. The parts are designed with ribs and webs to avoid varying metal thicknesses which cause problems during casting. The parts interlock, and are held onto the handle by a spring latch. One handle would be supplied with a range of gripping sleeves corresponding to standard pipe sizes. Corresponding British patent GB-189518831 was registered Oct. 8, 1895.

The Parmelee wrenches use a similar three-part gripping sleeve, but those use pins to connect the segments -- (see patent nos. 379,123, 648,706, and 871,436).

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