Roller valve device
Abstract
Abstract THE ROLLER VALVE DEVICE MINIMIZES THE SLIDING FRICTION IN THE OPERATION OF THE VALVE BY LOCATING TWO ROLLERS BETWEEN A PAIR OF GUIDE SURFACES WHICH ARE SPACED APART A DIFFERENCE LESS THAN THE SUM OF THE DIAMETERS OF SAID ROLLERS AND WRAPPING A FLEXIBLE RESILIENT BAND UNDER TENSION ABOUT SAID ROLLERS IN AN S-SHAPED CONFIGURATION TO DEFINE A FREELY ROTATABLE CLUSTER. ONE SIDE OF THE CLUSTER IS EXPOSED TO AIR UNDER PRESSURE AND THE VALVE PASSAGE IS LOCATED IN ONE OF THE GUIDE SURFACES. UPON CONTROLLED MOVEMENT OF THE CLUSTER BETWEEN THE GUIDE SUFRACES, THE BAND MAY BE SELECTIVELY DISPLACED BETWEEN A NON-SEALING POSITION WITH RESPECT TO THE VALVE PASSAGE TO CONTROL THE FLOW OF AIR PRESSURE THROUGH SAID VALVE PASSAGE.
Inventors
- 👤 Paul A Klann
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |