Patent US4992960A successfully refreshed from Google Patents.
Patent US3905722A successfully refreshed from Google Patents.
US3905722A
Expired / Lapsed
US
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Fluid flow machines
Assignee: Rolls Royce PLC
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Filing: 1973-03-12
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Granted: 1975-09-16
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Expires: 1993-03-12
Abstract
Abstract A fluid flow machine has a plurality of compressor blades, each blade has aerofoil and root portions together with a platform portion which is made of a material of a different nature to that of the blade, and which is joined to it. In one embodiment the blade is titanium and the platform portion is a foamed polyurethane resin.
Inventors
- 👤 Kenneth Ronald Guy
- 👤 Harry Dennis
- 👤 Robert Burns Hood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:49
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3007; F01D5/12; F01D5/28; F01D9/00; F01D9/02; F01D9/04; F01D9/042; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
A rotor for a fluid flow machine comprising a rotor body; an annular array of blades connected to and extending radially from said body, each blade having an aerofoil portion whose radially inner end terminates in a position spaced from the periphery of the body and a shank extending between the aerofoil portion and said periphery; and platform means made of a cellular material arranged between adjacent shanks.
Claim 2
Dependent Claim
68 words
A rotor for a fluid flow machine comprising a rotor body; an annular array of blades connected to and extending radially from said body, each blade having an aerofoil portion whose radially inner end terminates in a position spaced from the periphery of the body and a shank extending between the aerofoil portion and said periphery; and platform means made of a cellular material arranged between adjacent shanks.
Claim 3
Dependent Claim
19 words
A rotor according to claim 1 wherein the platform means comprise in-situ moulded units extending around the individual shanks.
Claim 4
Dependent Claim
21 words
A rotor according to claim 1 wherein the platform means comprise an in-situ moulded annulus connecting the shanks of said array.
References Cited (Backward Citations)
US2858103A
Cited
US3294366A
Cited
US3494539A
Cited
US3515501A
Cited
US3549444A
Cited
US3719431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |