Patent US3253933A successfully refreshed from Google Patents.
US3203471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative air preheater with stationary heat retaining mass and revolving connections
Assignee: Svenska Rotor Maskiner AB
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Filing: 1962-11-07
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Granted: 1965-08-31
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Expires: 1982-11-07
Abstract
No abstract record available.
Inventors
- 👤 Koch Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:30
CPC Classifications
F; F28; F28D; F28D17/00; F28D17/04; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/037; Y10S165/038; Y10S165/039
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A REGENERATIVE AIR PREHEATER HAVING A STATIONARY HEAT RETAINING MASS DIVIDED INTO SECTOR-SHAPED COMPARTMENTS, INLET AND OUTLET MEANS COMMUNICATING WITH SAID COMPARTMENTS FOR FLOW OF A HEAT EXCHANGING FLUID THERETHROUGH, REVOLVING SECOND INLET AND OUTLET MEANS PROVIDING SEQUENTIAL COMMUNICATION WITH SAID COMPARTMENTS FOR FLOW OF A SECOND HEAT EXCHANGING FLUID THERETHROUGH, SAID HEAT RETAINING MASS BEING SEPARATED INTO TWO SUPERIMPOSED HEAT RETAINING STAGES SPACED FROM EACH OTHER IN THE DIRECTION OF FLUID FLOW TO PROVIDE AN ANNULAR SPACE THEREBETWEEN, A ROTARY SLIDE VALVE DISPOSED IN SAID ANNULAR SPACE BETWEEN SAID STAGES, MEANS TO SYNCHRONOUSLY ROTATE SAID VALVE IN PHASE WITH SAID REVOLVING SECOND INLET AND OUTLET MEANS, SAID VALVE BEING DIVIDED CROSS SECTIONALLY INTO SECTORSHAPED PASSAGES IN ALIGNMENT WITH SAID REVOLVING SECOND INLET AND OUTLET MEANS, WHEREBY SAID PASSAGES PROVIDE CONTINUATION IN SAID ANNULAR SPACE OF SAID REVOLVING SECOND INLET AND OUTLET MEANS.
Claim 2
Dependent Claim
143 words
A REGENERATIVE AIR PREHEATER HAVING A STATIONARY HEAT RETAINING MASS DIVIDED INTO SECTOR-SHAPED COMPARTMENTS, INLET AND OUTLET MEANS COMMUNICATING WITH SAID COMPARTMENTS FOR FLOW OF A HEAT EXCHANGING FLUID THERETHROUGH, REVOLVING SECOND INLET AND OUTLET MEANS PROVIDING SEQUENTIAL COMMUNICATION WITH SAID COMPARTMENTS FOR FLOW OF A SECOND HEAT EXCHANGING FLUID THERETHROUGH, SAID HEAT RETAINING MASS BEING SEPARATED INTO TWO SUPERIMPOSED HEAT RETAINING STAGES SPACED FROM EACH OTHER IN THE DIRECTION OF FLUID FLOW TO PROVIDE AN ANNULAR SPACE THEREBETWEEN, A ROTARY SLIDE VALVE DISPOSED IN SAID ANNULAR SPACE BETWEEN SAID STAGES, MEANS TO SYNCHRONOUSLY ROTATE SAID VALVE IN PHASE WITH SAID REVOLVING SECOND INLET AND OUTLET MEANS, SAID VALVE BEING DIVIDED CROSS SECTIONALLY INTO SECTORSHAPED PASSAGES IN ALIGNMENT WITH SAID REVOLVING SECOND INLET AND OUTLET MEANS, WHEREBY SAID PASSAGES PROVIDE CONTINUATION IN SAID ANNULAR SPACE OF SAID REVOLVING SECOND INLET AND OUTLET MEANS.
References Cited (Backward Citations)
US3077926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |