Patent US4093552A successfully refreshed from Google Patents.
US4093552A
Expired / Lapsed
US
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Filtration apparatus
Assignee: Sulzer Escher Wyss AG
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Filing: 1976-11-30
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Granted: 1978-06-06
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Expires: 1996-11-30
Abstract
Abstract Filtration apparatus comprises in a housing an annular filtration chamber into which there is admitted a suspension under pressure and which is formed between an external filtration surface in the form of a body of revolution and an internal filtration surface which is housed therein and is in the form of a body of revolution also; the annular filtration chamber has a suspension inlet at one of the chamber ends and has at its other and a product outlet; the filtration surfaces are connected in each case to a filtrate discharge collector; a rotating mixing-agitating device is arranged in the annular filtration chamber.
Inventors
- 👤 August Guyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:08
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/11; B01D33/35; B01D33/37; B01D33/39; B01D33/58; B01D33/68; B01D33/70; B01D33/76; B01D33/763; B01D2201/00; B01D2201/28; B01D2201/287; F; F01; F01M; F01M1/00; F01M1/10; F01M2001/1028; F01M2001/1035
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
Apparatus for filtering a suspension under pressure comprising a. a housing containing an elongated, annular filtration chamber bounded by external and internal surfaces in the form of bodies of revolution, b. each of said surfaces being formed as a filtering member and being provided with a filtrate discharge collector; c. an inlet for introducing suspension under pressure to one end of said annular chamber and an axially spaced outlet for discharging filtered material from the opposite end of that chamber; d. means defining a permeable agitating partition of cylindrical form which is located in, and extends longitudinally of, the annular chamber; and e. drive means for rotating said partition, f. the partition being spaced radially from each of said surfaces so that, during operation, a body of suspension in a turbulent state forms between the partition and each surface and is effective to keep solids from accumulating on the adjacent surface.
Claim 2
Dependent Claim
151 words
Apparatus for filtering a suspension under pressure comprising a. a housing containing an elongated, annular filtration chamber bounded by external and internal surfaces in the form of bodies of revolution, b. each of said surfaces being formed as a filtering member and being provided with a filtrate discharge collector; c. an inlet for introducing suspension under pressure to one end of said annular chamber and an axially spaced outlet for discharging filtered material from the opposite end of that chamber; d. means defining a permeable agitating partition of cylindrical form which is located in, and extends longitudinally of, the annular chamber; and e. drive means for rotating said partition, f. the partition being spaced radially from each of said surfaces so that, during operation, a body of suspension in a turbulent state forms between the partition and each surface and is effective to keep solids from accumulating on the adjacent surface.
Claim 3
Dependent Claim
21 words
Apparatus as defined in claim 1 in which said means defining a permeable partition comprises a plurality of circumferentially spaced bars.
Claim 4
Dependent Claim
37 words
Apparatus as defined in claim 2 in which each bar is mounted for rotation about its axis; and the drive means includes planetary gearing which serves to rotate the bars about their axes as the partition rotates.
Claim 5
Dependent Claim
18 words
Apparatus as defined in claim 1 in which said means defining a permeable partition comprises a perforated tube.
Claim 6
Dependent Claim
34 words
Apparatus as defined in claim 4 in which the tube is provided with inclined ribs on its inner and outer surfaces which serve to convey material in the annular chamber axially toward said outlet.
Claim 7
Dependent Claim
28 words
Apparatus as defined in claim 1 in which the permeable partition is arranged eccentrically within the annular chamber; and the drive means revolves the partition in planetary fashion.
Claim 8
Dependent Claim
31 words
Apparatus as defined in claim 1 in which at least one of said surfaces is mounted for rotation in the housing; and which includes drive means for rotating said rotatable surface.
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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |