US Patent: 471,471
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| Pipe Wrench
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Patentee:
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| Augustus L. Engelbach (exact or similar names) - Leadville, CO |
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Patent Dates:
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| Applied: |
Jul. 06, 1891 |
| Granted: |
Mar. 22, 1892 |
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Patent Pictures:
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Augustus L. Engelbach patent March 22, 1892 |
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Stan Schulz
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Description: |
| Swinging hook jaw with a rectangular shank; the pivot point and effective working size is adjusted by a threaded rod within the handle.
Production information taken from Scientific American listing reprinted in "American Wrench Makers 1830-1930," by Ken Cope. |
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