US Patent: 611,771
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| Wrench
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Patentee:
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| Daniel A. Cheney (exact or similar names) - Central Park, MT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 04, 1898 |
| Granted: |
Oct. 04, 1898 |
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Patent Pictures:
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Daniel A. Cheney patent October 4, 1898 |
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Stan Schulz
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Description: |
| Improvement on patent no. 581,267. A cam lever in the movable jaw presses a toothed block against rack teeth on the shank. A screw-adjustable block on the back side of the movable jaw structure takes up slack from wear.
A possible prototype of the wrench with original copies of Cheney's patents (this patent and 581,267) sold in an online auction in June 2013. |
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