US Patent: 2,623,428
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| Self-Adjusting Pipe Wrench of A Spring-Impelled Trigger Actuator Type
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Patentee:
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| John V. Larson (exact or similar names) - Chicago, IL |
| USPTO Classifications: |
| 81/99 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 09, 1947 |
| Granted: |
Dec. 30, 1952 |
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Stan Schulz
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Description: |
| This self-closing pipe wrench is an evolution of self-closing wrenches of the type described in patent nos. 1,602,620, 1,830,033, and 2,351,821.
The key elements are the curved fixed jaw, actuating spring, and movable jaw with "trigger" end.
The patent references patent nos. 115,678, 614,255, 1,276,596, 1,337,678, 1,445,211, 1,486,981, 2,028,406, and 2,351,821. |
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