US Patent: 3,208,319
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| Self-Adjusting Wrench
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Patentees:
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| Benjamin F. Westby (exact or similar names) - Minneapolis, MN |
| Stanley L. Williamson (exact or similar names) - Minneapolis, MN |
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Patent Dates:
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| Applied: |
Nov. 20, 1961 |
| Granted: |
Sep. 28, 1965 |
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Patent Pictures:
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Benjamin F. Westby and Stanley L. Williamson patent September 28, 1965 |
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Stan Schulz
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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. |
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