Patent US2267501A successfully refreshed from Google Patents.
Patent US3582232A successfully refreshed from Google Patents.
US3582232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial turbine rotor
Assignee: Pratt and Whitney Canada Corp
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Filing: 1969-06-02
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Granted: 1971-06-01
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Expires: 1989-06-02
Abstract
Abstract A turbine rotor having radially extending blades, each provided with an internal passage through which cooling air may pass, with the passages opening on to the convex, low pressure surfaces of the blades of the rotor. The invention herein described was made in the course of or under a contract or subcontract thereunder (or grant) with the United States Department of the Army.
Inventors
- 👤 Ulo Okapuu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:20
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/085; F01D5/087; F01D5/04; F01D5/043; F01D5/046; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A turbine rotor comprising a hub, a plurality of blades projecting substantially radially from said hub, each said blade having a star section and an exducer section and being curved to provide a concave and a convex surface, a confined passage extending through said star section, said passage extending substantially axially and radially of said rotor, an outlet from said passage, said outlet opening through said convex surface whereby a fluid jet may be issued through said outlet, thereby tending to reduce the formation of a boundary layer on said convex surface.
Claim 2
Dependent Claim
92 words
A turbine rotor comprising a hub, a plurality of blades projecting substantially radially from said hub, each said blade having a star section and an exducer section and being curved to provide a concave and a convex surface, a confined passage extending through said star section, said passage extending substantially axially and radially of said rotor, an outlet from said passage, said outlet opening through said convex surface whereby a fluid jet may be issued through said outlet, thereby tending to reduce the formation of a boundary layer on said convex surface.
Claim 3
Independent Claim
31 words
A device, as defined in claim l, wherein said passage is substantially symmetrical with respect to the axial plane passing through the center line of the blade in said star section.
Claim 4
Dependent Claim
54 words
A device, as defined in claim 1, wherein said passage is formed by a pair of legs which meet adjacent the tip of said blade in said star section, one of said legs being connected with said opening and the other of said legs adapted to be connected to a source of cooling fluid.
Claim 5
Dependent Claim
54 words
A device as defined in claim 2, wherein said passage is formed by a pair of legs which meet adjacent the tip of said blade in said star section, one of said legs being connected with said opening and the other of said legs adapted to be connected to a source of cooling fluid.
References Cited (Backward Citations)
US2407531A
Cited
US2823008A
Cited
US2848190A
Cited
US2873945A
Cited
DE1059245B
Cited
US3423069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |