US3233661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue gas heated regenerative air preheater with stationary heat retaining mass and rotary air channel valves
Assignee: Svenska Rotor Maskiner AB
•
Filing: 1962-11-16
•
Granted: 1966-02-08
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Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
- 👤 Firgau Werner
- 👤 Haussler Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:04
CPC Classifications
F; F28; F28D; F28D17/00; F28D17/02; F28D17/023; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/01; Y10S165/011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A REGENERATIVE HEAT EXCHANGER FOR PREHEATING A STREAM OF AIR BY MEANS OF A STREAM OF FLUE GAS, SAID HEAT EXCHANGER COMPRISING A STATIONARY HEAT RETAINING MASS HAVING PASSAGES FOR THE FLOW OF AIR AND GAS THERETHROUGH IN COUNTER CURRENT RELATIONSHIP, A GAS INLET HOOD ON ONE SIDE OF SAID MASS AND GAS OUTLET HOOD ON THE OTHER SIDE OF SAID MASS, A ROTATABLE AIR INLET CASING DISPOSED WITHIN SAID GAS OUTLET HOOD, A ROTATABLE AIR OUTLET CASING DISPOSED WITHIN SAID GAS INLET HOOD, A CENTRAL STATOR TUBE FIXED TO SAID MASS AND EXTENDING THERETHROUGH, A DISK ROTATABLY MOUNTED ON ONE END OF SAID STATOR TUBE WITHIN SAID AIR INLET CASING, A SECOND DISK ROTATABLY MOUNTED ON THE OPPOSITE END OF SAID STATOR TUBE WITHIN
Claim 2
Dependent Claim
125 words
A REGENERATIVE HEAT EXCHANGER FOR PREHEATING A STREAM OF AIR BY MEANS OF A STREAM OF FLUE GAS, SAID HEAT EXCHANGER COMPRISING A STATIONARY HEAT RETAINING MASS HAVING PASSAGES FOR THE FLOW OF AIR AND GAS THERETHROUGH IN COUNTER CURRENT RELATIONSHIP, A GAS INLET HOOD ON ONE SIDE OF SAID MASS AND GAS OUTLET HOOD ON THE OTHER SIDE OF SAID MASS, A ROTATABLE AIR INLET CASING DISPOSED WITHIN SAID GAS OUTLET HOOD, A ROTATABLE AIR OUTLET CASING DISPOSED WITHIN SAID GAS INLET HOOD, A CENTRAL STATOR TUBE FIXED TO SAID MASS AND EXTENDING THERETHROUGH, A DISK ROTATABLY MOUNTED ON ONE END OF SAID STATOR TUBE WITHIN SAID AIR INLET CASING, A SECOND DISK ROTATABLY MOUNTED ON THE OPPOSITE END OF SAID STATOR TUBE WITHIN
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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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |