US4808076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for a gas turbine engine
Assignee: RTX Corp
•
Filing: 1987-12-15
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Granted: 1989-02-28
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Expires: 2007-12-15
Abstract
Abstract A rotor for a gas turbine engine is disclosed. The rotor comprises a glass or glass ceramic matrix reinforced with silicon carbide yarn fiber reinforcement and with silicon carbide yarn reinforcement. The local volume fraction of silicon carbide monofilament increases with increasing radial distance from the inner diameter of the rotor. The rotor exhibits high hoop strength, high oxidation resistance at elevated temperatures and nonuniform elastic modulus which increases with increasing radial distance from the inner diameter of the rotor.
Inventors
- 👤 David C. Jarmon
- 👤 Karl M. Prewo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:20
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; C; C03; C03C; C03C14/00; C03C14/002; C03C2214/00; C03C2214/02; C03C2214/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A turbine rotor comprising a glass or glass ceramic matrix reinforced with silicon carbide yarn fiber reinforcement and with silicon carbide monofilament fiber reinforcement, wherein the local volume fraction of the silicon carbide monofilament fiber reinforcement increases with increasing radial distance from the inner diameter of the turbine rotor so that the turbine rotor exhibits high hoop strength, oxidation resistance at elevated temperature and a nonuniform elastic modulus which increases with increasing radial distance from the inner diameter of the turbine rotor.
Claim 2
Dependent Claim
82 words
A turbine rotor comprising a glass or glass ceramic matrix reinforced with silicon carbide yarn fiber reinforcement and with silicon carbide monofilament fiber reinforcement, wherein the local volume fraction of the silicon carbide monofilament fiber reinforcement increases with increasing radial distance from the inner diameter of the turbine rotor so that the turbine rotor exhibits high hoop strength, oxidation resistance at elevated temperature and a nonuniform elastic modulus which increases with increasing radial distance from the inner diameter of the turbine rotor.
Claim 3
Dependent Claim
13 words
The turbine rotor of claim 1, wherein the glass matrix comprises borosilicate glass.
Claim 4
Dependent Claim
17 words
The turbine rotor of claim 1, wherein the glass ceramic matrix comprises lithium alumino silicate glass ceramic.
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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) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |