US3289436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air condition systems
Assignee: Hawker Siddeley Dynamics Ltd
•
Filing: 1965-04-29
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Granted: 1966-12-06
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Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Henry W Groves
- 👤 Goodwin Laurence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:00
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/02; B64D13/04; F; F25; F25B; F25B9/00; F25B9/002; F25B9/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN AIR-CONDITIONING SYSTEM FOR AN AIRCRAFT, COMPRISING HIGH AND LOW PRESSURE COMPRESSOR STAGES AND HIGH AND LOW PRESSURE TURBINE STAGES ALL COUPLED TO ONE ANOTHER WHEREBY THE TURBINE STAGES PROVIDE DRIVING POWER TO THE COMPRESSOR STAGES, CONDUIT MEANS FOR FEEDING AIR THROUGH SAID LOW AND HIGH PRESSURE COMPRESSOR STAGES IN SUCCESSION, AND THEN THROUGH SAID HIGH AND LOW PRESSURE TURBINE STAGES IN SUCCESSION, AND MEANS MIXING REFRIGERATED AIR DELIVERED FROM THE LOW PRESSURE TURBINE WITH AIR FROM UPSTREAM OF THE LOW PRESSURE COMPRESSOR TO OBTAIN THE FINAL TEMPERATURE OF THE AIR OUTPUT.
Claim 2
Dependent Claim
92 words
AN AIR-CONDITIONING SYSTEM FOR AN AIRCRAFT, COMPRISING HIGH AND LOW PRESSURE COMPRESSOR STAGES AND HIGH AND LOW PRESSURE TURBINE STAGES ALL COUPLED TO ONE ANOTHER WHEREBY THE TURBINE STAGES PROVIDE DRIVING POWER TO THE COMPRESSOR STAGES, CONDUIT MEANS FOR FEEDING AIR THROUGH SAID LOW AND HIGH PRESSURE COMPRESSOR STAGES IN SUCCESSION, AND THEN THROUGH SAID HIGH AND LOW PRESSURE TURBINE STAGES IN SUCCESSION, AND MEANS MIXING REFRIGERATED AIR DELIVERED FROM THE LOW PRESSURE TURBINE WITH AIR FROM UPSTREAM OF THE LOW PRESSURE COMPRESSOR TO OBTAIN THE FINAL TEMPERATURE OF THE AIR OUTPUT.
References Cited (Backward Citations)
CA687482A
Cited
US2485509A
Cited
US2526103A
Cited
US2453923A
Cited
FR66564E
Cited
US2767561A
Cited
US2767562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |