US3275140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air separator with fluidized discharge
Assignee: FLSmidth and Co AS
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Filing: 1963-04-11
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Granted: 1966-09-27
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Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 Rasmussen Frits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:28
CPC Classifications
B; B07; B07B; B07B4/00; B07B4/02; B07B4/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN AN AIR SEPARATOR OF THE CLOSED CIRCUIT TYPE FOR SEPARATING A FINELY DIVIDED MATERIAL INTO COARSE AND FINE FRACTIONS INCLUDING A SUBSTANTIALLY CLOSED CASING, MEANS IN SAID CASING DEFINING CONCENTRIC INNER AND OUTER CHAMBERS SPACED FROM THE TOP OF SAID CASING, SAID INNER CHAMBER FOR COLLECTING THE COARSE FRACTION AND SAID OUTER CHAMBER FOR COLLECTING THE FINE FRACTION, MEANS FOR MAINTAINING AN AIR CURRENT FLOWING UPWARDLY IN THE INNER CHAMBER AND FLOWING DOWNWARDLY IN THE OUTER CHAMBER MEANS FOR INTRODUCING FINELY DIVIDED MATERIAL INTO THE INNER CHAMBER FOR ENTRAINMENT OF THE FINE FRACTIONS IN THE AIR STREAM FOR TRANSFER TO THE OUTER CHAMBER AND COLLECTION OF THE COARSE FRACTION IN THE UPPER CHAMBER, AN INNER CHAMBER OUTLET IN SAID CASING AND OUTER CHAMBER OUTLET IN SAID CASING, THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING MEANS FOR MAINTAINING THE DISTANCE BETWEEN THE TOP OF THE CASING AND THE CHAMBER OUTLETS
Claim 2
Dependent Claim
149 words
IN AN AIR SEPARATOR OF THE CLOSED CIRCUIT TYPE FOR SEPARATING A FINELY DIVIDED MATERIAL INTO COARSE AND FINE FRACTIONS INCLUDING A SUBSTANTIALLY CLOSED CASING, MEANS IN SAID CASING DEFINING CONCENTRIC INNER AND OUTER CHAMBERS SPACED FROM THE TOP OF SAID CASING, SAID INNER CHAMBER FOR COLLECTING THE COARSE FRACTION AND SAID OUTER CHAMBER FOR COLLECTING THE FINE FRACTION, MEANS FOR MAINTAINING AN AIR CURRENT FLOWING UPWARDLY IN THE INNER CHAMBER AND FLOWING DOWNWARDLY IN THE OUTER CHAMBER MEANS FOR INTRODUCING FINELY DIVIDED MATERIAL INTO THE INNER CHAMBER FOR ENTRAINMENT OF THE FINE FRACTIONS IN THE AIR STREAM FOR TRANSFER TO THE OUTER CHAMBER AND COLLECTION OF THE COARSE FRACTION IN THE UPPER CHAMBER, AN INNER CHAMBER OUTLET IN SAID CASING AND OUTER CHAMBER OUTLET IN SAID CASING, THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING MEANS FOR MAINTAINING THE DISTANCE BETWEEN THE TOP OF THE CASING AND THE CHAMBER OUTLETS
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |