US4514976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated auxiliary power and environmental control unit
Assignee: Boeing North American Inc
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Filing: 1982-09-23
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Granted: 1985-05-07
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Expires: 2002-09-23
Abstract
Abstract An integrated auxiliary power unit and environmental control unit for an airplane 2, said integrated unit 2 comprising a prime mover 4, a variable geometry compressor 22 operable selectably by bleed air from the propulsion engine of said airplane or connectable via an overrunning clutch 18 to said prime mover, a controlled emission turbine 24 which is shaft-coupled to said compressor 22 and cooperating with said compressor to form an environmental control unit, and means for diverting a portion of the output of said compressor for use as an auxiliary power unit.
Inventors
- 👤 William J. Christoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:02
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; B; B64; B64D; B64D13/00; B64D13/06; B64D41/00; F02C6/00; F02C6/04; F02C6/06; B64D2013/0603; B64D2013/0611; F05; F05D; F05D2220/00; F05D2220/50; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y02T50/50; Y02T50/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
An integrated environmental control and auxiliary power unit for a vehicle having a propulsion engine, said unit comprising: a prime mover; a variable geometry compressor including a diffuser having a plurality of controllable variable exit vanes; means for positioning said variable exit vanes to control the output flow of said compressor; an overrunning clutch operable to couple said prime mover to drive said compressor; means for supplying bleed air from said propulsion engine to drive said compressor when said prime mover is not running; a controlled emission turbine coupled to said compressor by a common drive shaft; means for blocking a selectable portion of the flow supplied to said turbine to match the flow from said compressor to maintain near constant pressure to said turbine over a wide flow operating range; and means for independently utilizing the output flow from said compressor and from said turbine.
Claim 2
Dependent Claim
146 words
An integrated environmental control and auxiliary power unit for a vehicle having a propulsion engine, said unit comprising: a prime mover; a variable geometry compressor including a diffuser having a plurality of controllable variable exit vanes; means for positioning said variable exit vanes to control the output flow of said compressor; an overrunning clutch operable to couple said prime mover to drive said compressor; means for supplying bleed air from said propulsion engine to drive said compressor when said prime mover is not running; a controlled emission turbine coupled to said compressor by a common drive shaft; means for blocking a selectable portion of the flow supplied to said turbine to match the flow from said compressor to maintain near constant pressure to said turbine over a wide flow operating range; and means for independently utilizing the output flow from said compressor and from said turbine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |