US Patent: 12,753
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| Elastic-tube pump
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Patentees:
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| Rufus Porter (exact or similar names) - Washington, DC |
| J. D. Bradley (exact or similar names) - Brattleboro, VT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 17, 1855 |
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Jeff Joslin
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Description: |
| This pump consists of a single coil of vulcanized rubber inside a frame. A roller is turned by a handle and collapses a section of tubing. The liquid is forced out of one end of the tube as the handle is rotated and each portion of tubing springs back as it clears the roller, creating suction that refills that section of tubing. Ingenious but inefficient. |
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