US Patent: 106,467
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| Wrench
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Patentee:
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| Sylvanus Chapman (exact or similar names) - Charlestown, MA |
| USPTO Classifications: |
| 81/93 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 22, 1870 |
| Granted: |
Aug. 16, 1870 |
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Patent Pictures:
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Sylvanus Chapman Pat. Aug. 16, 1870 |
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Stan Schulz
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Description: |
| The operating nut is located between two "loops" of the movable jaw. A spring and pin inside the movable jaw allow for lateral movement to grip and release when the wrench is used on pipe or other cylindrical surface. |
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