Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 3,208,319
Self-Adjusting Wrench
Patentees:
Benjamin F. Westby (exact or similar names) - Minneapolis, MN
Stanley L. Williamson (exact or similar names) - Minneapolis, MN

USPTO Classifications:
81/367, 81/374, 81/379

Tool Categories:
wrenches : pliers type wrenches : locking pliers

Assignees:
None

Manufacturer:
Crestline, Inc. - Minneapolis, MN

Witnesses:
none listed

Patent Dates:
Applied: Nov. 20, 1961
Granted: Sep. 28, 1965

Patent Pictures: [ 1 | 2 ]
Benjamin F. Westby and Stanley L. Williamson patent September 28, 1965
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Stan Schulz
Description:
A compression spring and friction rod in the handle provide automatic size adjustment. Alternative cam and screw-adjustment means are provided for adjusting the gripping pressure of the jaws.

Patent nos. 2,531,285, 2,589,511, 2,595,579 and 2,997,903 are cited as relevant prior art.

Known example marked KWIK-GRIP PAT. PENDING MADE IN U.S.A. Manufacturer identity inferred from contemporary print advertising and mention of CRESTLINE, Inc. in the patent specifications. In the late 1960s, CRESTLINE was located in Little Falls, MN.

Patent no. 6,776,072 is a 21st Century "descendant" produced as the HART Auto Adjusting Locking Pliers.

Copyright © 2002-2024 - DATAMP