Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 287,998
Wrench
Automatic Self-Setting Wrench
Patentee:
Benjamin F. Bennett - Lockport, NY

USPTO Classifications:
81/153

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. R. Drake
George A. Burnett
T. H. Parsons

Patent Dates:
Applied: Sep. 08, 1883
Granted: Nov. 06, 1883

Patent Pictures:
Benjamin F. Bennett patent November 6, 1883
USPTO pdf tiff
Google Patents
Report data errors or omissions
Description:
The adjusting mechanism is a pair of spring-loaded rollers in tapered chambers within the movable jaw. They hold an adjustment by wedge action. The ends of the rollers have thumb buttons to pull them back and release their grip. The specifications note that the wrench only needs one roller & chamber, to resist "backward" pressure.

Improved by patent no. 323,776.

Copyright © 2002-2019 - DATAMP