US Patent: 698,780
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| Chain Pipe Wrench
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Patentee:
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| George Amborn, Jr. (exact or similar names) - Brooklyn, NY |
| USPTO Classifications: |
| 81/70 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 27, 1901 |
| Granted: |
Apr. 29, 1902 |
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Patent Pictures:
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George Amborn Jr. patent April 29, 1902 |
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Stan Schulz
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Description: |
| The head has an offset connection to the handle. This provides an open passage for the chain, which pivots from the head. The catch for the chain varies depending on whether flat or "cable" chain is used. The chain's connection to the head can also vary with an optional gimbal joint. The single gripping "head" is a feature of the AGRIPPA line of chain wrenches from Williams.
Corresponding British patent GB-190116352 was registered August 14, 1901; corresponding German patent DE-129254 was granted with effective date Aug. 8, 1901.
The patent was improved by patent no. 773,773. |
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