US Patent: 2,550,010
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| One-Way Engaging Wrench Having Guided Work-Engaging Rollers
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Patentee:
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| Alfred Kavalar (exact or similar names) - Detroit, MI |
| Manufacturer: |
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T.K.F. - Detroit, MI |
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Patent Dates:
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| Applied: |
Aug. 23, 1949 |
| Granted: |
Apr. 24, 1951 |
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Patent Pictures:
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Alfred Kavalar patent April 24, 1951 |
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Stan Schulz
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Description: |
| Ratchet action generated by rollers held in engagement with the work piece by springs. The patent claims this design would have more bearing surfaces and be less likely to damage the corners of hex nuts than flat jaw ratchets. The wrenches would also grip pipe. Marketed as "CAM-LOC."
The specifications cite patent nos. 602,283, 933,494, 1,200,430, 1,443,248, 2,371,653 and 2,411,739 as relevant prior art. |
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