Patent US3649490A successfully refreshed from Google Patents.
Patent US3942911A successfully refreshed from Google Patents.
US3942911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bladed rotors
Assignee: Dowty Rotol Ltd
•
Filing: 1974-02-15
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Granted: 1976-03-09
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Expires: 1994-02-15
Abstract
Abstract A bladed rotor including a hub which carries, so as to be rotatable therewith, a liquid reservoir, at least one pump operable upon rotation of the rotor, a single liquid-pressure-operable vane-type actuator for adjusting the blades of the rotor to vary flow of fluid over the blades, and control valve means for controlling operation of the actuator. The said pump, when operating, draws liquid from the reservoir and delivers it under pressure, by way of said control valve means, to said actuator.
Inventors
- 👤 John Gregory Keenan
- 👤 John Alfred Chilman
- 👤 Ivor Harold Brooking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:58
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: 13
Claim 1
Independent Claim
192 words
A bladed rotor including a hub and adjustable blades carried by the hub, said hub including, housed wholly therein in close proximity to each other and rotatable all as one therewith, (a) structure defining a liquid reservoir of annular form which, during rotation of the rotor, is independent of any liquid supply source external of said rotor, (b) a single liquid-pressure-operable vane-type actuator which is disposed with its axis of rotation coincident with the axis of rotation of the rotor, which is connected to said blades for effecting adjustment thereof to vary flow of fluid over the blades and which comprises two cooperable multi-vaned actuator components, (c) at least one pump which is so mounted upon one of said two components that its inlet port is disposed immediately adjacent to said reservoir and its axis of rotation is substantially offset from and parallel to the axis of rotation of the rotor, said pump being operable consequent upon rotation of the rotor to draw liquid directly and only from said reservoir, and, (d) control valve means by way of which liquid discharged under pressure by said pump is directed to operate said actuator.
Claim 2
Dependent Claim
192 words
A bladed rotor including a hub and adjustable blades carried by the hub, said hub including, housed wholly therein in close proximity to each other and rotatable all as one therewith, (a) structure defining a liquid reservoir of annular form which, during rotation of the rotor, is independent of any liquid supply source external of said rotor, (b) a single liquid-pressure-operable vane-type actuator which is disposed with its axis of rotation coincident with the axis of rotation of the rotor, which is connected to said blades for effecting adjustment thereof to vary flow of fluid over the blades and which comprises two cooperable multi-vaned actuator components, (c) at least one pump which is so mounted upon one of said two components that its inlet port is disposed immediately adjacent to said reservoir and its axis of rotation is substantially offset from and parallel to the axis of rotation of the rotor, said pump being operable consequent upon rotation of the rotor to draw liquid directly and only from said reservoir, and, (d) control valve means by way of which liquid discharged under pressure by said pump is directed to operate said actuator.
Claim 3
Dependent Claim
28 words
A bladed rotor as claimed in claim 1, and a central drive shaft on which said rotor is mounted, said actuator being annular and surrounding said drive shaft.
Claim 4
Dependent Claim
20 words
A bladed rotor as claimed in claim 1, said pump being disposed at least in part in said annular reservoir.
Claim 5
Dependent Claim
47 words
A bladed rotor as claimed in claim 1, and input means adapted to extend from non-rotative structure external of the rotor to the interior of said hub for transmitting input signals to said control valve means for initiating adjustment of the actuator and thus of the blades.
Claim 6
Dependent Claim
45 words
A bladed rotor as claimed in claim 1, said components being movable in opposite directions the one with respect to the other about said axis, both said components being connected to said blades for effecting adjustment thereof to vary flow of fluid over the blades.
Claim 7
Dependent Claim
21 words
A bladed rotor as claimed in claim, said pump being mounted upon an external end face of one of said components.
Claim 8
Dependent Claim
20 words
A bladed rotor as claimed in claim 6, said control valve means being also mounted upon said external end face.
Claim 9
Dependent Claim
120 words
A bladed rotor as claimed in claim 6, and shafting which is connected fast at one end with non-rotative structure external of the rotor and which passes coaxially into the hub and through the actuator, gearing associated with the other end of said shafting for affording continuous drive from said shafting outwardly thereof to said pump for operation thereof consequent upon rotation of the rotor, said pump being mounted upon said external end face through the intermediary of an annular plate which is so spaced from said end face that a cavity is formed between said plate and said end face, said gearing affording drive from said shafting to said pump being disposed at least in part in said cavity.
Claim 10
Dependent Claim
49 words
A rotor as claimed in claim 1, wherein said hub carries a further pump which, when said one pump is inoperative or substantially so, is operable, by motor means carried by non-rotative structure external of the rotor, to supply pressure liquid to the actuator for feathering of the blades.
Claim 11
Dependent Claim
27 words
A rotor as claimed in claim 9, wherein said reservoir comprises two parts, one associated with said one pump and the other associated with said further pump.
Claim 12
Dependent Claim
62 words
A rotor as claimed in claim 9, wherein shafting is provided whereby said further pump is operable upon rotation of the rotor, an end portion of said shafting having means associated therewith for holding it fast with respect to non-rotative structure external of the rotor, and said associated means being released when the motor means is required to operate said further pump.
Claim 13
Dependent Claim
34 words
A rotor as claimed in claim 9, wherein said further pump is mounted upon said component of the actuator and has its axis of rotation parallel to said axis of rotation of the rotor.
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |