US Patent: 1,827,202
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| Ratchet Wrench
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Patentee:
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| Walter F. Klein (exact or similar names) - Milwaukee, WI |
| USPTO Classifications: |
| 81/61 |
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Patent Dates:
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| Applied: |
Oct. 13, 1927 |
| Granted: |
Oct. 13, 1931 |
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Patent Pictures:
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Walter F. Klein patent October 13, 1931 |
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Stan Schulz
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Description: |
| The focus of the patent is the unique ratchet pawl which because of its circular shape is not liable to bend or shear compared to a pin or lever type pawl. The structure and dating of this ratchet appear to correspond to late 1920s ratchets produced by Snap-On and marked "Pat. Applied For."
The idea of a circular pawl was refined in Louis A. Hummel's reversible ratchet patent (no. 1,854,513) which was produced by Snap-On. |
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