Control valve arrangements
Abstract
Abstract A TEMPERATURE RESPONSIVE CONTROL VALVE ARRANGEMENT FOR CONTROLLING THE TEMPERATURE OF A LIQUID FLOWING IN A CONDUIT COMPRISES AN ELEMENT RESPONSIVE TO THE TEMPERATURE OF THE LIQUID IN THE CONDUIT, A HEAT EXCHANGER THROUGH WHICH AT LEAST PART OF THE FLOW OF LIQUID AND AT LEAST PART OF A FLOW OF A SECONDARY FLUID FLOW IN HEAT EXCHANGE RELATIONSHIP, A BY-PASS VALVE CONTROLLING THE FLOW OF EITHER THE LIQUID OR THE SECONDARY FLUID THROUGH THE HEAT EXCHANGER FOR REGULATING THE PROPORTIONS IN WHICH THE LIQUID AND THE SECONDARY FLUID FLOW THROUGH THE HEAT EXCHANGER, BY DIVIDING THE FLOW THERETHROUGH BETWEEN THE HEAT EXCHANG- ER AND A BY-PASS PASSAGE, THE VALVE BEING ADAPTED SO THAT THE TOTAL FLOW AREA PROVIDED THEREBY FOR THE FLOWS THROUGH THE HEAT EXCHANGER AND THE BY-PASS PASSAGE IS CONSTANT FOR ALL POSITIONS OF THE VALVE, AND A SINGLE-ACTING PISTON TYPE SERVO MOTOR CONNECTED TO THE VALVE AND OPERATED BY A SERVO FLUID AGAINST THE RESTRAINT OF A SPRING OPERATING ON THE PISTON THE PRESSURE OF WHICH SERVO FLUID IS CONTROLLED IN DEPENDENCE ON THE TEMPERATURE RESPONSIVE ELEMENT IN A SENSE TO MAINTAIN THE TEMPERATURE OF SAID LIQUID CONSTANT.
Inventors
- 👤 John Alfred Lipscombe
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |