US3622737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foil seal for gas turbine regenerator
Assignee: Individual
•
Filing: 1970-06-01
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Granted: 1971-11-23
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Expires: 1990-06-01
Abstract
Abstract A flexible foil is inserted loosely in a slot formed in the housing side of a shoe-type seal for a rotating regenerator. Tabs attached to each end of the foil bear against the shoe and prevent the foil from sliding longitudinally out of the groove. The slot preferably is formed by folding a projecting ledge of the shoe along one longitudinal edge toward an inclined surface of the shoe. A circular wire can be inserted in the folded joint to produce a slot having a substantially uniform width throughout its entire depth.
Inventors
- 👤 John J Trudeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:50
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456; F28; F28D; F28D19/00; F28D19/04; F28D19/047; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/026
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
115 words
In a gas turbine engine having a regenerator rotating in a housing with sectors of said regenerator being subjected to gas streams of different pressures, a sealing means for said regenerator comprising a shoe positioned in said housing where one surface faces said regenerator and the other surface faces said housing, said regenerator sliding on the shoe surface it faces, the other surface of said shoe having a longitudinal groove therein, a foil positioned loosely in said groove with the outer edge of said foil bearing against said housing, and tabs attached to each end of the foil and bearing against the shoe, said tabs preventing said foil from sliding longitudinally out of said groove.
Claim 2
Dependent Claim
115 words
In a gas turbine engine having a regenerator rotating in a housing with sectors of said regenerator being subjected to gas streams of different pressures, a sealing means for said regenerator comprising a shoe positioned in said housing where one surface faces said regenerator and the other surface faces said housing, said regenerator sliding on the shoe surface it faces, the other surface of said shoe having a longitudinal groove therein, a foil positioned loosely in said groove with the outer edge of said foil bearing against said housing, and tabs attached to each end of the foil and bearing against the shoe, said tabs preventing said foil from sliding longitudinally out of said groove.
Claim 3
Dependent Claim
48 words
The invention of claim 1 in which said shoe has a space at each end of the longitudinal groove and the tabs fit in said spaces and bear against lateral surfaces of said shoe defining said spaces to prevent said foil from sliding longitudinally out of said groove.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |