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US Patent: 573,999
Pipe Wrench
James H. Pierce - West Bay City, MI

USPTO Classifications:
81/100, 81/145

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : quick adjust wrenches


William Hjorth & Co. - Jamestown, NY
Brackin Mfg. Co. - Cleveland, OH

George E. Dickerson
George P. Thomas
Jas. E. Thomas

Patent Dates:
Applied: Sep. 08, 1896
Granted: Dec. 29, 1896

Patent Pictures: [ 1 | 2 ]
James H. Pierce patent December 29, 1896
USPTO pdf tiff
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A spring-loaded toothed pawl engages rack teeth on the shank of the movable jaw to hold adjustment.

Marketed as the BRACKIN PIPE WRENCH ca. 1898.

Also used in conjunction with Karl Peterson's August 4, 1903 patent (no. 735,289) for the Empire Pipe Wrench.

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