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