US Patent: 2,772,763
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| Ratchet Wrench
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Patentee:
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| Walter J. Johnson (exact or similar names) - Buffalo, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 12, 1951 |
| Granted: |
Dec. 04, 1956 |
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Patent Pictures:
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Walter J. Johnson patent December 4, 1956 |
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Stan Schulz
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Description: |
| Fraser, Myers & Manley - patent attorneys
Reversible ratchet with internal pawls. The specifications have extensive discussion of the operation and potential failure of internal ratchets. It is difficult to ascertain exactly what physical details are new in this patent without familiarity with prior art.
The specifications note May 8, 1934 patent no. 1,957,462 in this discussion.
The patent cites U.S. patent nos. 1,307,485, 1,957,462, 2,013,765, 2,020,883, 2,103,556, 2,126,843, 2,188,846, 2,395,681, 2,537,175, 2,543,509, 2,544,795, 2,571,939, and 2,591,993 and British Feb. 19, 1881 patent no. 729.
This patent referenced in pat. no. 3,532,013.
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