US3743008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerator seal
Assignee: Motors Liquidation Co
•
Filing: 1971-01-04
•
Granted: 1973-07-03
•
Expires: 1991-01-04
Abstract
Abstract A regenerator seal structure for a rotary regenerator in which the wear seal element of graphite or other suitable material is plasma spray bonded to a support structure such as a seal support platform or the matrix of the generator.
Inventors
- 👤 R Zeek
- 👤 A Hetke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:31
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/047; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02; Y10S165/021; Y10S165/022; Y10S277/00; Y10S277/922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
69 words
A rotary regenerator according to claim 1 wherein said matrix includes an annular groove on each face thereof, seal wear means positioned in said annular groove for engagement with said seal wear means on said circular rim portion of said support platform and, spray-bond material secured to said matrix and to the edges of said seal wear means to bond and seal said seal wear means to said matrix.
Claim 2
Dependent Claim
36 words
A rotary regenerator according to claim 1 wherein said plasma-spray material includes a layer of bond coat material against said support platform and a layer of plasma retaining material over said layer of bond coat material.
Claim 3
Dependent Claim
35 words
A rotary regenerator according to claim 3 wherein said layer of bond coat material is a nickel aluminide material and said layer of plasma retaining material is a nickel 75 percent graphite 25 percent material.
References Cited (Backward Citations)
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |