Valve flushing system
Abstract
Abstract A VALVE FLUSHING SYSTEM INCLUDING A PAIR OF FLUSH LINES CONNECTED TO THE TOP AND BOTTOM, RESPECTIVELY OF A BALL VALVE BODY. A DISCHARGE LINE IS CONNECTED BETWEEN ONE OF THE LINES AND THE MAIN UPSTREAM LINE, AND A REVERSING LINE IS CONNECTED BETWEEN THE OTHER LINER AND THE DISCHARGE LINE. A VALVE IS SITUATED IN EACH OF THE REVERSING AN DISCHARGE LINES SO THAT FLUID UNDER PRESSURE HIGHER THAN THAT IN THE MAIN UPSTREAM LINE MAY BE FORCED THROUGH ONE OF THE LINES. THROUGH THE BALL VALVE AND OUT THE OTHER LINE TO THE DISCHARGE LINE. IF THE FLUSHING IS DONE WHEN THE VALVE IS CLOSED, THE SEAT RINGS SEAL AGAINST THE BALL IRRESPECTIVELY OF THE DIRECTION OF PRESSURE DIFFERENTIAL SO THAT THE FLUSHING FLUID IS CONFINED BETWEEN THEM.
Inventors
- 👤 Donald E Graham
Bibliographic Details
Claims Analysis
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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 |