US3720313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal classifier
Assignee: AHLSTROM-C&V Inc A CORP OF FLORIDA
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Filing: 1970-07-10
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Granted: 1973-03-13
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Expires: 1990-07-10
Abstract
Abstract A HOUSING HAVING A CYLINDRICAL CAVITY THEREIN WITH A ROTOR COAXIALLY MOUNTED FOR ROTATION RELATIVE THERETO AND PASSAGEWAYS FOR PROVIDING A FLOW OF AIR FROM THE OUTER CIRCUMFERENCE TO THE AXIS OF THE ROTOR. A PLURALITY OF RADIALLY ORIENTED LONGITUDINALLY EXTENDING FINS AFFIXED TO THE ROTOR FOR PRODUCING A FORCED VORTEX IN THE FLOW OF AIR AND A PLURALITY OF RADIALLY SPACED SLOTS IN EACH OF THE FINS COINCIDING WITH LONGITUDINALLY EXTENDING RODS AFFIXED TO THE HOUSING FOR PRODUCING SHEAR FORCES TENDING TO DISPERSE SOLIDS CARRIED BY THE AIR INTO DISCRETE PARTICLES WHICH CAN BE SEPARATED INTO COARSE AND FINE FRACTIONS BY CENTRIFUGAL FORCE WITHIN THE VORTEX. D R A W I N G
Inventors
- 👤 C Lapple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:10
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08
Claims Analysis
Total Claims: 0
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |