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US Patent: 1,333,517
Pipe Wrench
Patentee:
Frederick E. Walden - Worcester, MA

USPTO Classifications:
81/92

Tool Categories:
wrenches : alligator wrenches

Assignees:
None

Manufacturer:
W-W Mfg. Co., Inc. - Worcester, MA

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 21, 1919
Granted: Mar. 09, 1920

Patent Pictures:
Frederick E. Walden Pat. March 9, 1920. 8 inch example from Stan Schulz collection
USPTO pdf tiff
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Description:
The patent provides for toothed and smooth jaws at an angle to each other, in the conformation generally known as "alligator wrench." The handle is formed of a bent rod. The patent shows relatively fixed position and adjustable jaw options. The actual production wrench does not include the adjustable jaw.

Advertised as the WAL-PAT pipe wrench in 6 in., 8 in., and 10 in. sizes in 1924.

Compare this to the SHAW WRENCH (Pat no. 956,280) and Walden's Oct. 13, 1914 patent no. 1,113,389.

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