US3876333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine engines and bladed rotors therefor
Assignee: DOWTRY ROTOL Ltd
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Filing: 1974-02-15
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Granted: 1975-04-08
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Expires: 1994-02-15
Abstract
Abstract A gas turbine engine of the by-pass type including a bladed rotor which is rotatable in a by-pass duct. The rotor includes a hub which carries, so as to be rotatable therewith, a liquid reservoir, at least one pump operable upon rotation of the rotor, relief valve means associated with the pump, and an actuator for adjusting the blades of the rotor to vary flow of fluid over the blades. The pump, when operating, draws liquid from the reservoir and delivers it under pressure to said actuator. Liquid discharged by the relief valve means in flowing to the reservoir passes adjacent to an outer wall of the hub.
Inventors
- 👤 George Lancaster Ronson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:01
CPC Classifications
F; F01; F01D; F01D7/00; F05; F05D; F05D2220/00; F05D2220/30; F05D2220/36; F05D2260/00; F05D2260/70; F05D2260/74; F05D2260/76
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A bladed rotor, suitable for a gas turbine engine of the bypass type, including a hub which carries, so as to be rotatable therewith, a liquid reservoir, at least one pump operable upon rotation of the rotor, relief valve means associated with said pump, and an actuator for adjusting the blades of the rotor to vary flow of fluid over the blades, said pump, when operating, drawing liquid from the reservoir and delivering it under pressure to said actuator, and liquid discharged by the relief valve means in flowing to the reservoir passing adjacent to an outer wall of the hub.
Claim 2
Dependent Claim
101 words
A bladed rotor, suitable for a gas turbine engine of the bypass type, including a hub which carries, so as to be rotatable therewith, a liquid reservoir, at least one pump operable upon rotation of the rotor, relief valve means associated with said pump, and an actuator for adjusting the blades of the rotor to vary flow of fluid over the blades, said pump, when operating, drawing liquid from the reservoir and delivering it under pressure to said actuator, and liquid discharged by the relief valve means in flowing to the reservoir passing adjacent to an outer wall of the hub.
Claim 3
Dependent Claim
26 words
A rotor as claimed in claim 1, wherein flow from said relief valve means to the reservoir is by way of means defining a spiral channel.
Claim 4
Dependent Claim
39 words
A rotor as claimed in claim 2, wherein means is provided externally of said hub whereby air is brought into heat-exchange relation, by way of said outer wall of the hub, with the liquid passing along said spiral channel.
Claim 5
Dependent Claim
38 words
A rotor as claimed in claim 3, wherein said means provided externally of the hub comprises ducting which incorporates impeller blading formed as part of spinner structure, said spinner structure being attachable to the hub for rotation therewith.
Claim 6
Dependent Claim
24 words
A rotor as claimed in claim 1, wherein the relief valve means comprises a respective relief valve disposed in the casing of said pump.
Claim 7
Dependent Claim
29 words
A rotor as claimed in claim 3, wherein mechanical means connect said pump with non-rotative structure external of the rotor to afford its operation upon rotation of the rotor.
Claim 8
Dependent Claim
33 words
A rotor as claimed in claim 6, wherein said mechanical means includes gearing, also carried by the hub, and shafting coaxial with the hub and extending from the gearing to said non-rotative structure.
Claim 9
Dependent Claim
26 words
A rotor as claimed in claim 1, wherein said actuator is of vane-type, having its axis of rotation coincident with the rotational axis of the rotor.
Claim 10
Dependent Claim
24 words
A bladed rotor as claimed in claim 1 adapted for rotation in the by-pass duct by a gas turbine engine of the by-pass type.
References Cited (Backward Citations)
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Cited
US3476486A
Cited
US3487880A
Cited
US3528752A
Cited
US3664763A
Cited
US3794440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |