US Patent: 729,728
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| Pipe Wrench
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Patentee:
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| Frank D. Bullard (exact or similar names) - Los Angeles, CA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 07, 1902 |
| Granted: |
Jun. 02, 1903 |
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Patent Pictures:
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Frank D. Bullard patent June 2, 1903 |
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Stan Schulz
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Description: |
| Tongs type gripping jaws, with a secondary lever providing not only adjusting force, but also increasing the gripping force.
The concept was further refined in patent nos. 733,138 and 742,389. The third patent was realized as the Bullard Automatic Wrench, produced by the Bullard Automatic Wrench Company of Providence, RI and successors. |
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