US3784091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator
Assignee: Individual
•
Filing: 1972-11-02
•
Granted: 1974-01-08
•
Expires: 1992-11-02
Abstract
Abstract A centrifugal separator comprising a rotary bowl and a screw conveyor rotatable in said bowl on the uniflow principle, wherein liquid separated from slurry in the bowl is withdrawn under suction through a conduit disposed beyond the level of the liquid in the bowl.
Inventors
- 👤 G Hiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/20; B04B15/00; B04B2001/2083
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
172 words
A centrifugal separator comprising a rotatable bowl, means for feeding a slurry into said bowl, a conveyor including a helical blade mounted on a generally cylindrical hub, said conveyor being rotatably supported inside said bowl, means for rotating said bowl and said conveyor at a differential speed, whereby centrifugal action produces a radially outermost layer of solids and an inner liquid layer, an opening near one end of the bowl for discharging the solids, at least one outlet opening in the bowl through which the liquid component of the slurry is discharged, a conduit on said conveyor having at least one suction orifice within said inner liquid layer and arranged at a distance from said means for feeding the slurry into said bowl, said conduit having at least one discharge orifice near said outlet opening for the liquid, means for producing a pressure difference between said suction orifice and said discharge orifice of the conduit, and means for restraining the slurry from said outlet opening and said discharge orifice of the conduit.
Claim 2
Dependent Claim
172 words
A centrifugal separator comprising a rotatable bowl, means for feeding a slurry into said bowl, a conveyor including a helical blade mounted on a generally cylindrical hub, said conveyor being rotatably supported inside said bowl, means for rotating said bowl and said conveyor at a differential speed, whereby centrifugal action produces a radially outermost layer of solids and an inner liquid layer, an opening near one end of the bowl for discharging the solids, at least one outlet opening in the bowl through which the liquid component of the slurry is discharged, a conduit on said conveyor having at least one suction orifice within said inner liquid layer and arranged at a distance from said means for feeding the slurry into said bowl, said conduit having at least one discharge orifice near said outlet opening for the liquid, means for producing a pressure difference between said suction orifice and said discharge orifice of the conduit, and means for restraining the slurry from said outlet opening and said discharge orifice of the conduit.
Claim 3
Dependent Claim
20 words
A separator according to claim 1, wherein said slurry restraining means comprise an annular partition arranged near said outlet opening.
Claim 4
Dependent Claim
14 words
A separator according to claim 2, wherein said partition is mounted on said bowl.
Claim 5
Dependent Claim
14 words
A separator according to claim 2, wherein said partition is mounted on said conveyor.
Claim 6
Dependent Claim
17 words
A separator according to claim 1, wherein said outlet opening is arranged near said slurry feeding means.
Claim 7
Dependent Claim
40 words
A separator according to claim 1, wherein said slurry feeding means comprise an aperture in said hub near one end of said bowl and wherein said discharge opening for the solids is arranged near the other end of said bowl.
Claim 8
Dependent Claim
34 words
A separator according to claim 1, wherein said bowl has a frUsto-conical portion and wherein said discharge opening for the solids is arranged on that portion of the bowl which has the smallest diameter.
Claim 9
Dependent Claim
20 words
A separator according to claim 1, wherein said means for producing a pressure difference comprise at least one nozzle arrangement.
Claim 10
Dependent Claim
14 words
A separator according to claim 8, wherein the nozzle arrangement is of annular form.
Claim 11
Dependent Claim
16 words
A separator according to claim 8 or, wherein the nozzle arrangement is mounted on the conveyor.
Claim 12
Dependent Claim
20 words
A separator according to claim 8, including at least one pipe for delivering a secondary fluid to the nozzle arrangement.
Claim 13
Dependent Claim
37 words
A separator according to claim 1, wherein said means for producing a pressure difference comprise a pipe connected to said outlet opening, the discharge opening of said pipe being arranged at a lower level than said bowl.
Claim 14
Dependent Claim
36 words
A separator according to claim 1, wherein said means for producing a pressure difference comprise a vacuum pump attached to the separator housing, and connecting means are provided establishing communication between said pump and said conduits.
Claim 15
Dependent Claim
48 words
A separator according to claim 1, wherein said means for producing a pressure difference comprise a vacuum pump disposed beyond and separate from the separator, and connecting means are provided in said slurry feeding means and in said conveyor for establishing communication between said pump and said conduits.
Claim 16
Dependent Claim
52 words
A separator according to claim 1, wherein said means for producing a pressure difference comprise a vacuum pump disposed outside the separator housing, and comprising connecting means outside the separator and connecting means in the cover of the bowl and in the conveyor for establishing communication between said pump and said conduits.
Claim 17
Dependent Claim
18 words
A separator according to claim 1, including means at said outlet opening for setting the level of liquid.
Claim 18
Dependent Claim
14 words
A separator according to claim 1, including a chamber in communication with said conduits.
Claim 19
Dependent Claim
42 words
A separator according to claim 17, including means for sealing said chamber and comprising a liquid surface produced by the overflow of liquid over said slurry retaining means from the separating chamber into a further chamber adjacent the chamber to be sealed.
Claim 20
Dependent Claim
33 words
A separator according to claim 1, wherein said conduits are disposed at a predetermined spacing from said liquid layer with the exception of said suction orifice, which is immersed in said liquid layer.
References Cited (Backward Citations)
US1056233A
Cited
US3268159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |