US Patent: 1,449,386 - Pipe Wrench


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US Patent: 1,449,386

Pipe Wrench

Patentees:

Edwin J. Evans - Salt Lake City, UT

George E. Hemphill - Salt Lake City, UT

USPTO Classifications:

81/109, 81/172

Tool Categories:

wrenches : pipe wrenches

Assignees:

None

Manufacturer:

H and E Wrench Co. - New Bedford, MA

Witnesses:

George C. Myers

W. F. Buckley, Jr.

Patent Dates:
Applied:	Mar. 17, 1922
Granted:	Mar. 27, 1923

Patent Pictures: [ 1 | 2 ]

E. J. Evans and G. E. Hemphill Patent March 27, 1923

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Description:

The swinging hook jaw is mounted on a base which is adjusted by a shaft with spiral grooves and a slide. The same adjustment mechanism is employed in Hemphill and Evans' nut wrench (pat. no. 1,391,179, Sept. 20, 1921).