US3567345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic pump
Assignee: W S SHAMBAN AND Co
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Filing: 1969-02-10
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Granted: 1971-03-02
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Expires: 1989-02-10
Abstract
Abstract IN A PERISTALTIC PUMP WHEREIN SPACED IMPELLER ROLLERS ON A ROTOR SUCCESSIVELY TRAVERSE A SECTION OF RESILIENTLY FLEXIBLE TUBING, THE IMPELLER ROLLERS ARE SHAPED TO FLATTEN A CENTRAL LONGITUDINAL PORTION OF THE TUBING AND TO PERMIT THE OPPOSITE LONGITUDINAL EDGES OF THE FLATTENED TUBING TO BULGE TO AVOID EXCESSIVE STRESSING OF THE TUBING.
Inventors
- 👤 John W Ballentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:10
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |