Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 22,947
Improvement in Construction of Screw Wrenches
Foster's Unyielding Grip Wrench
Dan P. Foster - Shelburne Falls, MA

USPTO Classifications:

Tool Categories:
wrenches : pipe and nut combination wrenches
wrenches : nut wrenches
wrenches : wrench adjustment types : screw adjust wrenches


D. P. Foster - Shelburne Falls, MA
D. P. Foster - Waltham, MA

C. C. Tolman
H. S. Greenleaf

Patent Dates:
Granted: Feb. 15, 1859

Reissue Information:
Reissued as RE5,914 (Jun. 16, 1874)

Patent Pictures: [ 1 | 2 ]
Dan P. Foster patent February 15, 1859, with 1870 J.J. WALWORTH catalog listing
USPTO pdf tiff
Google Patents
Report data errors or omissions
The adjustable jaw "floats" in relation to shank and fixed jaw. Manufacturer info. taken from Kenneth Cope's "American Wrench Makers 1830-1930." Header on reissue patent No. 5,914 notes the patent was extended seven years from the original expiration.

An 1870 WALWORTH catalog lists 3 sizes - 10", 14" and 18".

Copyright © 2002-2019 - DATAMP