US Patent: 488,431
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| Wrench
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Patentee:
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| John H. Gregory (exact or similar names) - Ione, CA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 28, 1892 |
| Granted: |
Dec. 20, 1892 |
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Patent Pictures:
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John H. Gregoary patent December 20, 1892 |
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Stan Schulz
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Description: |
| Pipe wrench. A spring on the movable jaw positions the rocking gripper. A cam lever locks and releases the engagement of teeth on the movable jaw and teeth on the main shank to set the size adjustment.
An optional metal handle has square wrench openings sized for the square studs on pipe plugs. |
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