Fill and discharge valve with manual operation
Abstract
Abstract A VESSEL FOR CORROSIVE SUBSTANCES OR THE LIKE HAS A VALVE CONSTRUCTION CONSTITUTED BY A FILL AND DISCHARGE VALVE ADAPTED FOR BEING OPENED AND CLOSED BY A PRESSURE FLUID, AND A NORMALLY CLOSED BACK PRESSURE VALVE WHICH IS OPENED BY THE FILL AND DISCHARGE VALVE WHEN THE LATTER IS OPENED TO PERMIT FILLING OR EMPTYING THE VESSEL. A MANUALLY OPERATED SPINDLE NUT IS THREADED ON A STEM OF THE FILL AND DISCHARGE VALVE AN THE SPINDLE NUT IS DISPLACEABLE BETWEEN TWO LIMIT POSITIONS. IN A FIRST POSITION THE STEM IS SECURED AND LOCKED AND OPENING OF THE FILL AND DISCHARGE VALVE IS PREVENTED. WHEN THE NUT IS OUT OF THE FIRST POSITION THE FILL AND DISCHARGE VALVE CAN BE OPERATED BY THE PRESSURE FLUID, AND WHEN THE NUT IS TURNED IN THE SECOND POSITION THE STEM IS DISPLACED AND THE FILL AND DISCHARGE VALVE IS OPENED WITHOUT SUPPLY OF THE PRESSURE FLUID.
Inventors
- 👤 Walter Krause
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |