US3237854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sludge centrifuge
Assignee: Alfa Laval Holdings Amsterdam AB
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Filing: 1963-02-20
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Granted: 1966-03-01
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Expires: 1983-02-20
Abstract
No abstract record available.
Inventors
- 👤 Thylefors Henric Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:15
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/14; B04B1/16; B04B1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
A SLUDGE CENTRIFUGE COMPRISING A CENTRIFUGAL ROTOR MOUNTED FOR ROTATION ABOUT AN AXIS AND HAVIG A SEPARATING SPACE AND ALSO HAVING A PERIPHERAL OPENING FOR DISCHARGING SEPARATED SLUDGE FROM SAID SPACE, A FIRST VALVE IN THE ROTOR PARTLY DEFINING SAID SEPARATING SPACE AND MOVABLE AXIALLY OF THE ROTOR TO OPEN AND CLOSE AND SLUDGE DISCHARGE OPENING, SAID VALVE FORMING WITH THE ROTOR A FIRST OPERATING LIQUID CHAMBER, THE ROTOR HAVING A FIRST OPERATING LIQUID OUTLET LEADING FROM THE OUTER PORTION OF SAID FIRST CHAMBER TO THE OUTSIDE OF THE ROTOR, A SECOND VALVE CARRIED BY THE ROTOR AND NORMALLY BIASED TO A CLOSED POSITION FOR CLOSING SAID FIRST OUTLET, THE SECOND VALVE FORMING WITH THE ROTOR A SECOND OPERATING LIQUID CHAMBER AND BEING MOVABLE AXIALLY OF THE ROTOR BY LIQUID IN SAID SECOND CHAMBER TO AN OPEN POSITION FOR OPENING SAID FIRST OUTLET, AND LIQUID SUPPLY MEANS COMMUNICATING WITH SAID CHAMBERS FOR FEEDING OPERATING LIQUID TO SAID FIRST CHAMBER TO MOVE THE FIRST VALVE INTO POSITION FOR CLOSING THE SLUDGE DISCHARGE OPENING, SAID MEANS BEING OPERABLE TO FEED OPERATING LIQUID TO SAID SECOND CHAMBER TO MOVE THE SECOND VALVE TO ITS OPEN POSITION FOR DISCHARGING LIQUID FROM SAID FIRST CHAMBER, SAID SECOND CHAMBER HAVING AN OPERATING LIQUID OUTLET SEPARATE FROM SAID FIRST LIQUID OUTLET.
Claim 2
Dependent Claim
214 words
A SLUDGE CENTRIFUGE COMPRISING A CENTRIFUGAL ROTOR MOUNTED FOR ROTATION ABOUT AN AXIS AND HAVIG A SEPARATING SPACE AND ALSO HAVING A PERIPHERAL OPENING FOR DISCHARGING SEPARATED SLUDGE FROM SAID SPACE, A FIRST VALVE IN THE ROTOR PARTLY DEFINING SAID SEPARATING SPACE AND MOVABLE AXIALLY OF THE ROTOR TO OPEN AND CLOSE AND SLUDGE DISCHARGE OPENING, SAID VALVE FORMING WITH THE ROTOR A FIRST OPERATING LIQUID CHAMBER, THE ROTOR HAVING A FIRST OPERATING LIQUID OUTLET LEADING FROM THE OUTER PORTION OF SAID FIRST CHAMBER TO THE OUTSIDE OF THE ROTOR, A SECOND VALVE CARRIED BY THE ROTOR AND NORMALLY BIASED TO A CLOSED POSITION FOR CLOSING SAID FIRST OUTLET, THE SECOND VALVE FORMING WITH THE ROTOR A SECOND OPERATING LIQUID CHAMBER AND BEING MOVABLE AXIALLY OF THE ROTOR BY LIQUID IN SAID SECOND CHAMBER TO AN OPEN POSITION FOR OPENING SAID FIRST OUTLET, AND LIQUID SUPPLY MEANS COMMUNICATING WITH SAID CHAMBERS FOR FEEDING OPERATING LIQUID TO SAID FIRST CHAMBER TO MOVE THE FIRST VALVE INTO POSITION FOR CLOSING THE SLUDGE DISCHARGE OPENING, SAID MEANS BEING OPERABLE TO FEED OPERATING LIQUID TO SAID SECOND CHAMBER TO MOVE THE SECOND VALVE TO ITS OPEN POSITION FOR DISCHARGING LIQUID FROM SAID FIRST CHAMBER, SAID SECOND CHAMBER HAVING AN OPERATING LIQUID OUTLET SEPARATE FROM SAID FIRST LIQUID OUTLET.
References Cited (Backward Citations)
GB662451A
Cited
FR1284378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |