Invertible valve trim for control valves
Abstract
Abstract A VALVE TRIM CAGE WITH A TUBULAR BODY PROVIDED WITH REVERSIBLE ENDS AND FLOW CONTROLLING PORT MEANS DIFFERENTLY CHARACTERIZED AXIALLY OF THE BODY. IN A DOUBLE EMBODIMENT THE CAGE EXTENDS TO EITHER SIDE OF THE VALVE BODY PARTITION, AND IS PROVIDED WITH AN INTERMEDIATE DOUBLE FACED SEAT FOR THE VALVE PLUG. IN A SINGLE EMBODIMENT THE CAGE ENGAGES A SLIP RING WHICH SEATS ALSO THE VALVE PLUG. IN THE DOUBLE EMBODIMENT THE PORT MEANS ARE DIFFERENTLY CHARACTERIZED TO EITHER SIDE OF THE VALVE SEAT, AND IN THE SINGLE EMBODIMENT THE PORT MEANS ARE DIFFERENTLY CHARACTERIZED AT OPPOSITE AXIAL END PORTIONS. THE SINGLE EMBODIMENT PROVIDES FOR DIFFERENT FLOW CONTROLLING BY INVERTING OF THE CAGE, AND THE DOUBLE EMBODIMENT PROVIDES FOR DIFFERENT FLOW CONTROLLING BOTH BY SAID INVERTING AND BY REPOSITIONING OF THE PLUG FROM ONE TO THE OTHER SIDE OF SAID PARTITION.
Inventors
- 👤 Gareth Allan Keith
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |