US Patent: 507,587
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| Nut Wrench
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Patentee:
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| Theodore C. Lippitt (exact or similar names) - Shenandoah, IA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 09, 1893 |
| Granted: |
Oct. 31, 1893 |
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Patent Pictures:
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Theodore C. Lippitt patent October 31, 1893 |
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Stan Schulz
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Description: |
| Screw adjustment. The parallelogram linkage between the main shank and secondary shank keeps the jaw faces parallel. The patent includes supplemental pipe-gripping jaws.
Corresponding Canadian patent no. CA-44,935 was issued December 20, 1893. |
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