US Patent: 251,333
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| Wrench For Bung Bushes
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Patentee:
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| Albert Zoller (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 15, 1881 |
| Granted: |
Dec. 20, 1881 |
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Patent Pictures:
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Albert Zoller patent December 20, 1881 |
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Stan Schulz
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Description: |
| The wrench uses multiple rollers to grip the inner surface of barrel bung bushes for insertion and removal. The rollers are held in place by a retaining ring, and forced outward by an eccentric inner head. |
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