US Patent: 482,527
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| Pipe Wrench
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Patentee:
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| Daniel R. Porter (exact or similar names) - Chelsea, MA |
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Patent Dates:
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| Applied: |
May 16, 1892 |
| Granted: |
Sep. 13, 1892 |
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Patent Pictures:
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1 | 2
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Daniel R. Porter patent September 13, 1892 |
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Stan Schulz
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Description: |
| The adjusting screw is in the rocking frame that holds the movable jaw. Produced as the COLUMBIAN pipe wrench.
True Mfg. produced five-inch long versions as the COLUMBIA BABY bicycle or pocket wrench with tire iron handle end and smooth or pipe jaws; a nominal 6-inch smooth jaw COLUMBIAN WRENCH produced by the Columbian Mfg. Co. is also known. |
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