US Patent: 317,670
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Wrench
Self-Gripping Pipe Wrench
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Patentee:
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| George F. Pottle (exact or similar names) - Boston, MA |
| USPTO Classifications: |
| 81/97 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 28, 1883 |
| Granted: |
May 12, 1885 |
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Patent Pictures:
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George F. Pottle patent May 12, 1885 |
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Stan Schulz
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Description: |
| A spring-loaded gripping surface in the movable jaw has an extended pin or peg which pushes the jaw tighter when the workpiece bears against it. The fixed jaw has a recess to accommodate the peg. |
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