US Patent: 143,908
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Pipe-Wrenches
Improved Pipe-Wrench
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Patentee:
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| David D. Ingram (exact or similar names) - Manistee, MI |
| USPTO Classifications: |
| 81/98 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 08, 1873 |
| Granted: |
Oct. 21, 1873 |
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Patent Pictures:
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David D. Ingram Pat. Oct. 21, 1873 |
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Stan Schulz
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Description: |
| A pivoting toothed cam in the "fixed" jaw creates the wedging action needed to turn pipe. The specifications note the pipe wrench could be combined with a "traditional" nut wrench on the opposite side of the shank. |
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