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US Patent: 626,401
Pipe Wrench
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

A. A. Morgan
C. R. Morgan

Patent Dates:
Applied: Jul. 27, 1898
Granted: Jun. 06, 1899

Patent Pictures:
S. Lloyd Wiegand patent June 6, 1899
USPTO pdf tiff
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The basic principle of segments of an arc forming the gripping surface for a pipe wrench appears in earlier patents such as the March 6, 1888 Homer Parmelee patent 379,123.

In this patent the focus is on alternate forms for connecting the arc segments, means to connect the segments to the handle, and alternate forms for spring latches to hold the gripping segements closed around the pipe. The patent notes sets of gripping sections to fit a range of pipe sizes. The handle is "trough shaped," with the spring latch contained within the "trough."

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