US3645645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-area nozzle seal
Assignee: Garrett Corp
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Filing: 1970-10-19
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Granted: 1972-02-29
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Expires: 1990-10-19
Abstract
Abstract This variable-area nozzle vane seal consists of a slot extending from side-to-side of a vane and from a point adjacent the leading edge to another near the overlap of the vanes when in reduced nozzle area positions. This slotting establishes in effect labyrinth seals between the sides of the vanes and the air passage in which they are disposed. The seal is further improved by drilled holes establishing communication between the slots mentioned above and the spaces between adjacent vanes. Airflow through the spaces causes reduced pressure in the slots and leakage is collected and added to flow through the nozzle to assist turbine operation.
Inventors
- 👤 Edward L Gammill
- 👤 Nick M Hughes
- 👤 James A Rhoden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:14
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/165; F01D11/00; F01D11/005; F02; F02B; F02B37/00; F02B37/12; F02B37/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
Sealing means for a variable-area nozzle of the type having a passageway defined by a pair of spaced walls and a plurality of airfoil-shaped nozzle vanes with leading and trailing edges supported between said walls for adjustment about spaced axes extending transversely of the passageway and substantially normal to the surfaces of said walls to control the flow of fluid under pressure from an inlet plenum to a point of use, comprising: a. means forming a slot on each side of each nozzle vane adjacent the walls defining the passageway; and b. means in each vane establishing communication between the slots at the sides thereof.
Claim 2
Dependent Claim
105 words
Sealing means for a variable-area nozzle of the type having a passageway defined by a pair of spaced walls and a plurality of airfoil-shaped nozzle vanes with leading and trailing edges supported between said walls for adjustment about spaced axes extending transversely of the passageway and substantially normal to the surfaces of said walls to control the flow of fluid under pressure from an inlet plenum to a point of use, comprising: a. means forming a slot on each side of each nozzle vane adjacent the walls defining the passageway; and b. means in each vane establishing communication between the slots at the sides thereof.
Claim 3
Dependent Claim
26 words
Sealing means as defined in claim 1 in which the slot formed by the first means extends from one side to the other in each vane.
Claim 4
Dependent Claim
31 words
Sealing means as defined in claim 1 in which the slot formed by the first means extends a predetermined distance along the vane from a point adjacent the vane leading edge.
Claim 5
Dependent Claim
44 words
Sealing means as defined in claim 1 in which the first-mentioned means forms a slot extending a predetermined distance into the vanes at each side thereof and the second-mentioned means includes at least one passage connecting the slots at the sides of the vanes.
Claim 6
Dependent Claim
37 words
Sealing means as defined in claim 1 in which means are provided to establish communication between the slots in the vanes and the spaces between adjacent vanes a predetermined distance in advance of the vane trailing edges.
Claim 7
Dependent Claim
47 words
Sealing means as defined in claim 2 in which at least one drilled passage extends from the rear end of the slot in each vane to one of the nozzle forming surfaces of the vane at a point disposed in predetermined relation to the vane trailing edge.
Claim 8
Dependent Claim
51 words
Sealing means as defined in claim 2 in which each vane is provided with a disk concentric with the axis of adjustment of the vane and the slot formed by the first means extends from a point adjacent the vane leading edge to another point adjacent the edge of said disk.
References Cited (Backward Citations)
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US2597510A
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US2501614A
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US3101926A
Cited
GB971548A
Cited
US3414188A
Cited
US3495921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |