Patent US3754839A successfully refreshed from Google Patents.
US3754839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament reinforced rotor assembly
Assignee: RTX Corp
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Filing: 1972-05-01
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Granted: 1973-08-28
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Expires: 1992-05-01
Abstract
Abstract This invention relates to a rotor assembly reinforced with a filament wound composite ring. The rotor assembly comprises a rotor including a plurality of radially extending circumferentially spaced blades. The composite ring surrounds the blade tips and is closely spaced therefrom by radially flexible support means. During rotor operation the blade tips grow radially outwardly and come into centrifugal load carry relationship to the composite ring, whereupon the ring carries a portion of the centrifugal loads thus reducing the strength requirements of the blades and rotor.
Inventors
- 👤 R Bodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/22; F01D21/00; F01D21/04; F01D21/045; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A filament reinforced rotor assembly comprising: a rotor; a plurality of radially extending blades circumferentially spaced about the periphery of said rotor and attached thereto; an annular filament wound composite ring closely surrounding the tips of said blades and radially spaced therefrom when said rotor is at rest; and radially flexible support means disposed on said rotor, concentrically positioning said ring with respect to said blades and adapted to permit said ring to come into centrifugal load bearing relationship to said blades during rotor operation due to the different centrifugal and thermal growth rates of said blades and said composite ring.
Claim 2
Dependent Claim
101 words
A filament reinforced rotor assembly comprising: a rotor; a plurality of radially extending blades circumferentially spaced about the periphery of said rotor and attached thereto; an annular filament wound composite ring closely surrounding the tips of said blades and radially spaced therefrom when said rotor is at rest; and radially flexible support means disposed on said rotor, concentrically positioning said ring with respect to said blades and adapted to permit said ring to come into centrifugal load bearing relationship to said blades during rotor operation due to the different centrifugal and thermal growth rates of said blades and said composite ring.
Claim 3
Dependent Claim
27 words
The filament reinforced rotor assembly according to claim 1 including barrier means between said ring and said blades to prevent contact between said ring and said blades.
Claim 4
Dependent Claim
31 words
The filament reinforced rotor assembly according to claim 1 wherein said support means includes barrier means between said ring and said blades to prevent contact between said ring and said blades.
Claim 5
Dependent Claim
20 words
The filament reinforced rotor assembly according to claim 2 wherein said barrier means is an annular tube encapsulating said ring.
Claim 6
Dependent Claim
20 words
The filament reinforced rotor assembly according to claim 3 wherein said barrier means is an annular tube encapsulating said ring.
Claim 7
Dependent Claim
18 words
The filament reinforced rotor assembly according to claim 5 wherein said annular tube is filled with inert gas.
Claim 8
Dependent Claim
36 words
The filament reinforced rotor assembly according to claIm 1 wherein said support means includes an axially extending radially flexible annular ring connected to said blades and adapted to provide said radial flexibility to said support means.
Claim 9
Dependent Claim
42 words
The filament reinforced rotor assembly according to claim 7 wherein each of said blades includes a tip shroud and a radially extending seal segment, and said composite ring is connected to said seal segments by said axially extending radially flexible annular ring.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |