US Patent: 419,854
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| Pipe Wrench
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| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 23, 1889 |
| Granted: |
Jan. 21, 1890 |
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Patent Pictures:
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Don J. Hersey patent January 21, 1890 |
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Description: |
| An intermediate lever between the handle and movable jaw has rack teeth that engage teeth on the shaft of the movable jaw. The end of this lever is wider than the body of the wrench to provide a grip surface for adjustment. Springs hold the parts in engagement.
Corresponding British patent GB-189005238 was registered April 5, 1890. |
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