US3640452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator
Assignee: Alfa Laval AB
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Filing: 1969-10-13
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Granted: 1972-02-08
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Expires: 1989-10-13
Abstract
Abstract A liquid component separated in a centrifugal rotor is thrown therefrom into a surrounding housing where the level of the liquid component is controlled by an element responsive to changes in such level and operable to regulate the supply of a superatmospheric pressure gas to the interior of the housing, the latter having a bottom outlet for discharging the liquid component and which is subjected to a counterpressure.
Inventors
- 👤 Henric Wilhelm Thylefors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:35
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/02; B04B7/04; B04B1/00; B04B1/04; B04B1/08; B04B1/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
In a centrifugal separator for a mixture including a liquid component, the combination of a stationary housing, a centrifugal rotor surrounded by the housing and having an inlet for said mixture, the rotor also having an outlet from which said liquid component of the mixture is thrown into the interior of said housing, the housing having a bottom outlet for discharging said liquid component and which is subjected to a counterpressure, said housing being adapted to accumulate a body of the liquid component having a level, and means for controlling said level of the liquid component in the housing, said level control means including a source of superatmospheric pressure gas, and an element responsive to changes in said level for controlling a supply of gas from said source into the housing.
Claim 2
Dependent Claim
131 words
In a centrifugal separator for a mixture including a liquid component, the combination of a stationary housing, a centrifugal rotor surrounded by the housing and having an inlet for said mixture, the rotor also having an outlet from which said liquid component of the mixture is thrown into the interior of said housing, the housing having a bottom outlet for discharging said liquid component and which is subjected to a counterpressure, said housing being adapted to accumulate a body of the liquid component having a level, and means for controlling said level of the liquid component in the housing, said level control means including a source of superatmospheric pressure gas, and an element responsive to changes in said level for controlling a supply of gas from said source into the housing.
Claim 3
Dependent Claim
43 words
The combination according to claim 1, comprising also a nozzle forming the rotor outlet for said liquid component, the combination comprising also a pipeline leading from the bottom of said housing for returning sludge from said nozzle to said inlet of the rotor.
Claim 4
Dependent Claim
40 words
The combination according to claim 1, comprising also a paring disc forming an outlet for a separated component of said mixture, said disc forming a liquid seal between the atmosphere surrounding the rotor and an atmosphere present within the rotor.
Claim 5
Dependent Claim
27 words
The combination according to claim 3, comprising also means forming a passage through which the atmosphere present within the rotor communicates with the atmosphere surrounding said housing.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |