Patent US371925A successfully refreshed from Google Patents.
Patent US3552575A successfully refreshed from Google Patents.
US3552575A
Expired / Lapsed
US
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Centrifuge
Assignee: Mannesmann Demag Krauss Maffei GmbH
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Filing: 1968-12-02
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Granted: 1971-01-05
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Expires: 1988-12-02
Abstract
Abstract A centrifuge wherein a hollow apertured cylindrical carrier supports and rotates a primary and a secondary separating unit. The primary unit includes a perforated conical or semispherical bowl which is separably accommodated in the carrier and receives incoming material whereby some of the liquid fraction penetrates through the bowl and escapes through the carrier. The remainder travels upwardly beyond the open top of the bowl and travels along the upwardly and outwardly sloping inner annular surfaces of rings in the secondary unit. The solid fraction travels upwardly beyond the inner surfaces of successive rings. The liquid fraction adheres to such surfaces and flows along convex top surfaces and thereupon along downwardly and outwardly sloping outer surfaces of the rings.
Inventors
- 👤 Gunther Hultsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:38
CPC Classifications
B; B04; B04B; B04B3/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
179 words
A centrifuge, particularly for separation of solid and liquid fractions of suspensions, comprising rotary carrier means; a primary separating unit including a perforated bowl having an open top and being removably supported by and rotatable with said carrier means; means for feeding incoming material into said bowl whereby some of the liquid fraction passes through and the remainder of such material travels toward and beyond the open top of said bowl; and a secondary separating unit including at least one annular member supported by and rotatable with said carrier means, said annular member having an upwardly diverging first annular surface arranged to intercept said remainder of the material, a second annular surface located downstream of and diverging in a direction away from said first surface, and a convex annular intermediate surface disposed between said first and second surfaces, the solid fraction of said remainder being arranged to travel upwardly along and beyond said first surface and the liquid fraction of said remainder being arranged to adhere to and to travel along and beyond said first, intermediate and second surfaces.
Claim 2
Dependent Claim
179 words
A centrifuge, particularly for separation of solid and liquid fractions of suspensions, comprising rotary carrier means; a primary separating unit including a perforated bowl having an open top and being removably supported by and rotatable with said carrier means; means for feeding incoming material into said bowl whereby some of the liquid fraction passes through and the remainder of such material travels toward and beyond the open top of said bowl; and a secondary separating unit including at least one annular member supported by and rotatable with said carrier means, said annular member having an upwardly diverging first annular surface arranged to intercept said remainder of the material, a second annular surface located downstream of and diverging in a direction away from said first surface, and a convex annular intermediate surface disposed between said first and second surfaces, the solid fraction of said remainder being arranged to travel upwardly along and beyond said first surface and the liquid fraction of said remainder being arranged to adhere to and to travel along and beyond said first, intermediate and second surfaces.
Claim 3
Dependent Claim
34 words
A centrifuge as defined in claim 1, wherein said carrier means is arranged to rotate about a substantially vertical axis and wherein the cross-sectional area of said bowl increases toward said open top thereof.
Claim 4
Dependent Claim
29 words
A centrifuge as defined in claim 1, wherein said carrier means is hollow and wherein at least the major part of said bowl is accommodated in said carrier means.
Claim 5
Dependent Claim
31 words
A centrifuge as defined in claim 1, wherein said carrier means is provided with at least one aperture for escape of liquid fraction which enters said carrier means through said bowl.
Claim 6
Dependent Claim
40 words
A centrifuge as defined in claim 1, wherein said bowl is of conical shape and diverges upwardly toward said open top as such an angle that the solid fraction can readily slide therealong in response to rotation of the bowl.
Claim 7
Dependent Claim
15 words
A centrifuge as defined in claim 1, wherein said bowl is of substantially semispherical shape.
Claim 8
Dependent Claim
29 words
A centrifuge as defined in claim 1, wherein said bowl is rotatable about a substantially vertical axis and said primary separating unit further compriSes stiffening means for said bowl.
Claim 9
Dependent Claim
22 words
A centrifuge as defined in claim 7, wherein said stiffening means comprises rings located in planes making right angles with said axis.
Claim 10
Dependent Claim
30 words
A centrifuge as defined in claim 1, wherein a portion of said bowl in the proximity of said open top is a cylinder which is coaxial with said carrier means.
Claim 11
Dependent Claim
26 words
A centrifuge as defined in claim 1, further comprising annular baffle means defining with said open top an annular clearance for the remainder of said material.
Claim 12
Dependent Claim
18 words
A centrifuge as defined in claim 10, further comprising fastener means securing said baffle means to said bowl.
Claim 13
Dependent Claim
19 words
A centrifuge as defined in claim 10, wherein said baffle means has an upwardly and outwardly diverging outer side.
Claim 14
Dependent Claim
58 words
A centrifuge as defined in claim 1, wherein said secondary unit comprises a plurality of annular members located one above the other and annular ramps having upwardly and outwardly diverging guide surfaces each arranged to direct the solid fraction from the first surface of a lower annular member against the first surface of the adjoining upper annular member.
Claim 15
Dependent Claim
34 words
A centrifuge as defined in claim 13, wherein each of said ramps has a lower edge defining with the intermediate surface of the adjoining lower annular member an annular gap for the liquid fraction.
References Cited (Backward Citations)
US2422464A
Cited
US3276591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |