US Patent: 657,391


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

US Patent: 657,391

Wrench

Patentee:

Thomas H. Brosnihan - Livermore Falls, ME

USPTO Classifications:

81/171, 81/179, 81/185.2

Tool Categories:

wrenches : pipe wrenches

Assignees:

None

Manufacturer:

Brosnihan Wrench Co. - Worcester, MA

Sargent and Company - New Haven, CT

Witnesses:

Patent Dates:
Applied:	Dec. 15, 1899
Granted:	Sep. 04, 1900

Patent Pictures:

Thomas H. Brosnihan patent Sept. 4, 1900

USPTO Images
Google Patents
Report data errors or omissions

Description:

The key elements of the patent are the hardened pipe-gripping jaw faces. The pipe-gripping jaw face on the adjustable jaw slides on a keyway-shaped base, and is pressed outward by a spring.