Patent US2157149A successfully refreshed from Google Patents.
Patent US3552883A successfully refreshed from Google Patents.
US3552883A
Expired / Lapsed
US
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Ejector control system
Assignee: RTX Corp
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Filing: 1969-02-24
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Granted: 1971-01-05
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Expires: 1989-02-24
Abstract
Abstract AN EJECTOR FOR AUGMENTING THE FLOW FROM THE MIDSTAGE BLEED OF AN AIRCRAFT COMPRESSOR BY DRIVING THE PRIMARY NOZZLE BY HIGH-STAGE BLEED FOR SUPPLYING PRESSURIZED AIR TO AN AIRCRAFT AIR-CONDITIONING SYSTEM INCLUDES A CONTROL RESPONDING TO MIDSTAGE BLEED PRESSURE TO CONTROL THE AREAS OF THE PRIMARY AND SECONDARY NOZZLES OF THE EJECTOR. TEMPERATURE AND PRESSURE OVERRIDE MEANS FURTHER CONTROL THE EJECTOR IN ACCORDANCE WITH A PREDETERMINED FLOW-PRESSURE SCHEDULE.
Inventors
- 👤 Roger D Weatherbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:48
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/48; F04F5/50; B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; F04F5/46; F04F5/461
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |