US Patent: 1,023,533
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| Pipe Wrench
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Patentees:
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| Harry R. Sinclair (exact or similar names) - Worcester, MA |
| Carl Ekman (exact or similar names) - Worcester, MA |
| USPTO Classifications: |
| 81/64 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 28, 1909 |
| Granted: |
Apr. 16, 1912 |
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Patent Pictures:
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Harry R. Sinclair and Carl Ekman patent April 16, 1912 |
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Stan Schulz
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Description: |
| A modification of Sinclair's July 12, 1904 (pat. no. 764,641) strap wrench. In this patent, the fixed end of the strap is held by a wedge in a tapered throat. |
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