US Patent: 464,899
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| Pipe or Nut Wrench
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Patentee:
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| George B. Schaeffer (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 01, 1891 |
| Granted: |
Dec. 08, 1891 |
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Patent Pictures:
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George B. Schaeffer patent December 8, 1891 |
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Stan Schulz
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Description: |
| Quick-adjust with a spring dog engaging rack teeth on the shank. The wrench converts between pipe and nut by shifting the spring dog from the front to the back of the movable jaw. |
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