US Patent: 131,252
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Improvement in Pipe-Wrenches
Improvement in Self-Adjusting Pipe Wrenches
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| USPTO Classifications: |
| 81/99 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Sep. 10, 1872 |
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Patent Pictures:
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John Craig Pat. September 10, 1872 |
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Stan Schulz
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Description: |
| The wrench is a swinging hook-jaw self-adjusting pipe wrench with a spring-loaded button in the base of the swinging jaw to push the jaw toward a closed position. The specifications note the shape of the hook jaw and curved face of the fixed jaw would maximize the range of sizes the wrench would accomodate. |
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