US Patent: 2,205,501
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| Safety Wrench
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Patentee:
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| Joseph Sunnen (exact or similar names) - Ladue Village, St. Louis Count, MO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 27, 1937 |
| Granted: |
Jun. 25, 1940 |
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Patent Pictures:
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Joseph Sunnen patent June 25, 1940 |
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Stan Schulz
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Description: |
| After setting the desired tension level, the differential movement between the middle tube section and the end of the handle triggers "breakdown" when the tension level is reached. Two alternative forms are shown in the drawings and described in the specifications. |
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