US3741288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformed seal assembly for a gas turbine regenerator
Assignee: Ford Motor Co
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Filing: 1971-06-25
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Granted: 1973-06-26
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Expires: 1991-06-25
Abstract
Abstract A crossarm member extending across the regenerator has one surface in sliding contact therewith and the other surface spaced a short distance away from an inwardly projecting ridge of the regenerator cover. A foil has one edge attached to the crossarm member and the other edge projects outward to contact the ridge. The central portion of the foil has a preformed step adjacent the welded edge and is wider than the end portions to accommodate pressure and temperature induced movement of the cover away from the regenerator during engine operation.
Inventors
- 👤 J Vallance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:59
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/047; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
In a gas turbine engine having a regenerator rotating in a housing with portions of said regenerator being subjected to gas streams of different pressures, a sealing system for said regenerator comprising a shoe member having one surface sliding on said regenerator, and a foil member having one longitudinal edge attached to said shoe member and the other longitudinal edge projecting away from the shoe member to contact said housing, the central portion of said foil member having a preformed step adjacent the edge attached to said shoe member and the end portions of said foil member projecting smoothly away from the shoe member.
Claim 2
Dependent Claim
104 words
In a gas turbine engine having a regenerator rotating in a housing with portions of said regenerator being subjected to gas streams of different pressures, a sealing system for said regenerator comprising a shoe member having one surface sliding on said regenerator, and a foil member having one longitudinal edge attached to said shoe member and the other longitudinal edge projecting away from the shoe member to contact said housing, the central portion of said foil member having a preformed step adjacent the edge attached to said shoe member and the end portions of said foil member projecting smoothly away from the shoe member.
Claim 3
Dependent Claim
20 words
The engine of claim 1 in which the central portion of the foil member is wider than its end portions.
Claim 4
Dependent Claim
21 words
The engine of claim 2 in which said one longitudinal edge of the foil member is welded to the shoe member.
Claim 5
Dependent Claim
38 words
The engine of claim 3 in which the end portions of the foil member project away from the shoe member at an angle of about 10*-15* and the central portion projects initially at an angle of about 30*-75*.
Claim 6
Dependent Claim
43 words
The engine of claim 4 in which the housing comprises a cover member located outward of said regenerator, said cover member having an inwardly projecting ridge extending across the regenerator, said foil member having its projecting longitudinal edge in contact with said ridge.
Claim 7
Dependent Claim
36 words
The engine of claim 5 comprising an arcuate foil extending longitudinally along said shoe member on the same side as said foil member, said arcuate foil having both of its longitudinal edges contacting said shoe member.
Claim 8
Dependent Claim
31 words
The engine of claim 6 comprising a support bar extending along and in contact with the welded edge of the foil member, said support bar being welded to said foil member.
Claim 9
Dependent Claim
38 words
The engine of claim 1 in which the end portions of the foil member project away from the shoe member at an angle of about 10*-15* and the central portion projects initially at an angle of about 30*-75*.
Claim 10
Dependent Claim
43 words
The engine of claim 1 in which the housing comprises a cover member located outward of said regenerator, said cover member having an inwardly projecting ridge extending across the regenerator, said foil member having its projecting longitudinal edge in contact with said ridge.
Claim 11
Dependent Claim
36 words
The engine of claim 1 comprising an arcuate foil extending longitudinally along said shoe member on the same side as said foil member, said arcuate foil having both of its longitudinal edges contacting said shoe member.
Claim 12
Dependent Claim
31 words
The engine of claim 1 comprising a support bar extending along and in contact with the welded edge of the foil member, said support bar being welded to said foil member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |