US Patent: 268,408
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| Wrench For Bung Bushings
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Patentee:
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| William W. Jackson (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 29, 1882 |
| Granted: |
Dec. 05, 1882 |
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Patent Pictures:
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William J. Jackson patent December 5, 1882 |
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Stan Schulz
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Description: |
| The central core has a single vertical slot that allows it to expand outward to grip the inner surface of the bushing as the tapered threaded stem is screwed in. |
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