US Patent: 4,406,186
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| Dual action ratchet wrench
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Patentee:
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| Stephen A. Gummow (exact or similar names) - Minneapolis, MN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 29, 1981 |
| Granted: |
Sep. 27, 1983 |
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Patent Pictures:
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Patent 4,406,186 - selected edited drawing |
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Stan Schulz
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Description: |
| Reversible ratchet with handle that can be shifted in relation to the mid-line of the ratchet head.
This patent was noted in a "Garage Journal" discussion thread as "precursor" to subsequent Cole patents [5,419,221 ff.], and that patent infringement suits were later involved.
Prior art patent cited as references include 591,167, 1,000,878, 1,429,386, 1,568,442, 1,665,944, 2,082,356, 2,420,132, 2,669,147, 2,680,983, 2,712,765 and 2,834,239. Cited in 5,419,221 and 5,775,184. See also subsequent patent 6,101,907. |
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