US Patent: 492,834
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| Pipe Wrench
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Patentee:
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| George W. Porter (exact or similar names) - Parkersburg, WV |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 09, 1891 |
| Granted: |
Mar. 07, 1893 |
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Patent Pictures:
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George W. Porter patent March 7, 1893 |
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Stan Schulz
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Description: |
| The swinging hook jaw pivots from a block threaded on the main shank. A leaf spring attached to the block forces the hook jaw into gripping position in relation to the jaw face on the main shank. |
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