US3857650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vaned rotor for gas turbines
Assignee: Fiat SpA
•
Filing: 1973-10-23
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Granted: 1974-12-31
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Expires: 1993-10-23
Abstract
Abstract A vaned rotor of the type comprising a central metal hub or rotor body carrying a plurality of rotor blades made of a ceramic material, in which the blades are simply located on the rotor body and held in place by a coil of carbon fibres or ceramic fibres which surrounds the blades. To form a support surface for the coil each blade has a transverse part at the radially outer end thereof, which is partly cylindrical and which together with the transverse parts of the other blades, forms a substantially cylindrical support surface for the coil.
Inventors
- 👤 R Cerrato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:37
CPC Classifications
F; F01; F01D; F01D21/00; F01D21/04; F01D21/045; F01D5/00; F01D5/12; F01D5/22; F01D5/225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
In a vaned rotor for a gas turbine, of the type comprising: a rotor having a metal rotor body, a plurality of ceramic vanes, and means for locating the vanes on the periphery of the metal body, the improvement wherein, - each vane has a transverse part at the radially outer end thereof, said transverse parts of said vanes together forming a support surface, and a coil of substantially inextensible filaments, wound around said support surface, said coil acting to absorb all the radial forces exerted on said vanes of said rotor during use.
Claim 2
Dependent Claim
94 words
In a vaned rotor for a gas turbine, of the type comprising: a rotor having a metal rotor body, a plurality of ceramic vanes, and means for locating the vanes on the periphery of the metal body, the improvement wherein, - each vane has a transverse part at the radially outer end thereof, said transverse parts of said vanes together forming a support surface, and a coil of substantially inextensible filaments, wound around said support surface, said coil acting to absorb all the radial forces exerted on said vanes of said rotor during use.
Claim 3
Dependent Claim
36 words
The vaned rotor of claim 1, wherein said coil wound on said support surface formed by said transverse parts of said vanes, comprises a plurality of filaments of a material with a high modulus of elasticity.
Claim 4
Dependent Claim
15 words
The vaned rotor of claim 2, wherein said filaments are fibres of a ceramic material.
Claim 5
Dependent Claim
12 words
The vaned rotor of claim 2, wherein said filaments are carbon fibres.
Claim 6
Dependent Claim
71 words
The vaned rotor of claim 1, wherein the radially outer surface of said transverse parts of each said vane is a partly cylindrical surface, said partly cylindrical surfaces together forming a substantially continuous cylindrical support surface, two lateral shoulders on said radially outer surface of each said transverse part, said shoulders being axially spaced and extending substantially circumferentially of said cylindrical surface, to define therebetween a circumFerential channel for said fibres.
Claim 7
Dependent Claim
56 words
The vaned rotor of claim 1 wherein said means for locating the vanes on the periphery of the metal body comprise a plurality of grooves in the circumference of said rotor body extending parallel to the axis of rotation of said body and a circumferential groove deeper than said plurality of grooves and intercepting said grooves.
References Cited (Backward Citations)
FR997219A
Cited
FR55020E
Cited
US3095138A
Cited
US3042366A
Cited
US3403844A
Cited
US3601500A
Cited
US3556675A
Cited
US3754839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |