Patent US4645416A successfully refreshed from Google Patents.
US4645416A
Expired / Lapsed
US
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Valve and manifold for compressor bore heating
Assignee: RTX Corp
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Filing: 1984-11-01
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Granted: 1987-02-24
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Expires: 2004-11-01
Abstract
Abstract The bore of the compressor of a gas turbine engine is selectively heated by mid-stage compressor bleed air and a higher stage compressor bleed air utilizing a two position valve integral with the engine case and manifold with provision for fail-safe in the lower temperature bleed air position.
Inventors
- 👤 Harvey I. Weiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:23
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D11/14; F01D11/20; F01D11/24; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
For a gas turbine engine having an engine case housing a compressor rotor having compressor blades extending in the bore of the engine case, means for selectively heating the bore to expand said compressor rotor so as to maintain a limited clearance of the tips of the said compressor blades, said means including a valve having a first and second position, the engine casing being enlarged to accommodate said valve and defining a manifold, connecting means for leading mid-stage compressor bleed air into said manifold and a higher stage compressor bleed air into said manifold, said valve interconnecting said bore and said manifold for selectively injesting mid-stage compressor bleed air and a higher stage compressor bleed air into said bore and control means for positioning said valve to said first position and alternately to said second position.
Claim 2
Dependent Claim
137 words
For a gas turbine engine having an engine case housing a compressor rotor having compressor blades extending in the bore of the engine case, means for selectively heating the bore to expand said compressor rotor so as to maintain a limited clearance of the tips of the said compressor blades, said means including a valve having a first and second position, the engine casing being enlarged to accommodate said valve and defining a manifold, connecting means for leading mid-stage compressor bleed air into said manifold and a higher stage compressor bleed air into said manifold, said valve interconnecting said bore and said manifold for selectively injesting mid-stage compressor bleed air and a higher stage compressor bleed air into said bore and control means for positioning said valve to said first position and alternately to said second position.
Claim 3
Dependent Claim
63 words
For a gas turbine engine as in claim 1 wherein said valve includes a valve element having a pair of opposing surfaces, one surface being exposed to mid-stage bleed and the other surface being exposed to the higher stage bleed wherein said valve element is automatically urged to conduct mid-stage bleed air to said bore in the event said control means become inoperative.
References 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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |