US3177676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning systems
Assignee: Normalair Ltd
•
Filing: 1964-03-27
•
Granted: 1965-04-13
•
Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Abrahams Noel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
IN AN AIR CONDITIONING SYSTEM FOR AN AIRCRAFT, A FIRST TURBINE AND A SECOND TURBINE, A HEAT EXCHANGER, FIRST PASSAGE MEANS FOR CONNECTING THE INLETS OF SAID FIRST AND SECOND TURBINES THROUGH SAID HEAT EXCHANGER TO A SOURCE OF PRESSURIZED AIR, SECOND PASSAGE MEANS FOR CONNECTING THE OUTLETS OF SAID FIRST AND SECOND TURBINES TO AT LEAST ONE SPACE TO BE COOLED, THIRD PASSAGE MEANS FOR CONNECTING THE OUTLET OF SAID FIRST TURBINE TO THE INLET OF SAID SECOND TURBINE, VALVE MEANS IN SAID FIRST PASSAGE MEANS FOR SELECTIVELY CLOSING OFF THE INLET OF SAID SECOND TURBINE FROM THE SOURCE OF PRESSURIZED AIR, VALVE MEANS IN SAID SECOND PASSAGE MEANS FOR SELECTIVELY CLOSING OFF THE OUTLET OF SAID FIRST TURBINE FROM THE SPACE TO BE COOLED, AND VALVE MEANS FOR CLOSING OFF SAID THIRD PASSAGE MEANS AGAINST FLOW FROM SAID SECOND TURBINE OF SAID FIRST TURBINE, WHEREBY SAID FIRST AND SECOND TURBINES CAN BE COMPOUNDED IN EITHER SERIES OF PARALLEL RELATIONSHIP IN ACCORDANCE WITH THE CONDITIONS OF THE SOURCE OF PRESSURIZED AIR.
Claim 2
Dependent Claim
172 words
IN AN AIR CONDITIONING SYSTEM FOR AN AIRCRAFT, A FIRST TURBINE AND A SECOND TURBINE, A HEAT EXCHANGER, FIRST PASSAGE MEANS FOR CONNECTING THE INLETS OF SAID FIRST AND SECOND TURBINES THROUGH SAID HEAT EXCHANGER TO A SOURCE OF PRESSURIZED AIR, SECOND PASSAGE MEANS FOR CONNECTING THE OUTLETS OF SAID FIRST AND SECOND TURBINES TO AT LEAST ONE SPACE TO BE COOLED, THIRD PASSAGE MEANS FOR CONNECTING THE OUTLET OF SAID FIRST TURBINE TO THE INLET OF SAID SECOND TURBINE, VALVE MEANS IN SAID FIRST PASSAGE MEANS FOR SELECTIVELY CLOSING OFF THE INLET OF SAID SECOND TURBINE FROM THE SOURCE OF PRESSURIZED AIR, VALVE MEANS IN SAID SECOND PASSAGE MEANS FOR SELECTIVELY CLOSING OFF THE OUTLET OF SAID FIRST TURBINE FROM THE SPACE TO BE COOLED, AND VALVE MEANS FOR CLOSING OFF SAID THIRD PASSAGE MEANS AGAINST FLOW FROM SAID SECOND TURBINE OF SAID FIRST TURBINE, WHEREBY SAID FIRST AND SECOND TURBINES CAN BE COMPOUNDED IN EITHER SERIES OF PARALLEL RELATIONSHIP IN ACCORDANCE WITH THE CONDITIONS OF THE SOURCE OF PRESSURIZED AIR.
References Cited (Backward Citations)
US3097508A
Cited
US2557099A
Cited
US2767561A
Cited
US2871672A
Cited
US2930205A
Cited
US2871671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |