US3693803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter device
Assignee: DR ING HANS MULLER CHEMIE-APPARATEBAU
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Filing: 1970-11-23
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Granted: 1972-09-26
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Expires: 1990-11-23
Abstract
Abstract A housing has a peripheral wall provided with an opening in which a shaft is rotatably journalled with an end portion thereof extending through the opening to the exterior of the housing. Disc-shaped filter elements are mounted in axial succession on the shaft for rotation therewith. A sleeve surrounds the end portion of the shaft extending into the interior of the housing where it abuts against a terminal one of the filter elements. The sleeve is slidable axially of the shaft and a pressure-exerting arrangement is provided exteriorly of the housing for exerting pressure on the sleeve in a sense displacing it deeper into the housing and thereby exerting pressure upon and squeezing the filter elements on the shaft.
Inventors
- 👤 Bruno Guazzone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/80; B01D33/801
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
In a filter device, in combination, a housing having a peripheral wall provided with an opening; a shaft rotatably journalled in said housing and having an end portion extending through said opening and to the exterior of said housing; rotating means exteriorly of said housing and having a component engaging said end portion of said shaft for rotating the latter; a plurality of filter elements mounted and axially arrayed on said shaft within said housing for rotation with said shaft; and pressure means for subjecting said filter elements to pressure axially of said shaft, said pressure means including a sleeve slidably surrounding said end portion, and having an outer part without said housing intermediate the same and said component of said rotating means, and an inner part within said housing and abutting an adjacent filter element, and an actuating arrangement outside said housing and operable for exerting pressure upon said outer part axially of said shaft in a sense pressing said inner part against said adjacent filter element for transmittal of such pressure to the remaining ones of said filter elements.
Claim 2
Dependent Claim
181 words
In a filter device, in combination, a housing having a peripheral wall provided with an opening; a shaft rotatably journalled in said housing and having an end portion extending through said opening and to the exterior of said housing; rotating means exteriorly of said housing and having a component engaging said end portion of said shaft for rotating the latter; a plurality of filter elements mounted and axially arrayed on said shaft within said housing for rotation with said shaft; and pressure means for subjecting said filter elements to pressure axially of said shaft, said pressure means including a sleeve slidably surrounding said end portion, and having an outer part without said housing intermediate the same and said component of said rotating means, and an inner part within said housing and abutting an adjacent filter element, and an actuating arrangement outside said housing and operable for exerting pressure upon said outer part axially of said shaft in a sense pressing said inner part against said adjacent filter element for transmittal of such pressure to the remaining ones of said filter elements.
Claim 3
Dependent Claim
25 words
In a filter device as defined in claim 1, wherein said filter elements are substantially disc-shaped and extend transversely of the axis of said shaft.
Claim 4
Dependent Claim
32 words
In a filter device as defined in claim 1; and coupling means coupling said sleeve for rotation with said shaft while permitting axial sliding of said sleeve with reference to said shaft.
Claim 5
Dependent Claim
25 words
In a filter device as defined in claim 1; and further comprising sealing means sealing said opening against the passage of fluid past said sleeve.
Claim 6
Dependent Claim
31 words
In a filter device as defined in claim 1; and further comprising sealing means sealing the interior of said sleeve against the passage of fluid between said shaft and said sleeve.
Claim 7
Dependent Claim
31 words
In a filter device as defined in claim 5, said sealing means comprising at least one sealing element intermediate and in sealing engagement with said sleeve and said one filter element.
Claim 8
Dependent Claim
44 words
In a filter device as defined in claim 1, said filter elements being of disc-shaped outline and each having an annular hub surrounding said shaft, and wherein said sleeve comprises an inner annular flange-shaped endportion abutting against said hub of said one filter element.
Claim 9
Dependent Claim
48 words
In a filter device as defined in claim 1, said filter elements being hollow, and said shaft having an internal passage communicating with the interior of said filter elements for receiving filtrate therefrom; and outlet means in said shaft exteriorly of said housing and communicating with said passage.
Claim 10
Dependent Claim
61 words
In a filter device as defined in claim 3, said coupling means comprising radially aligned axial grooves in an inner surface of said sleeve and an outer surface of said shaft surrounded by said sleeve, respectively, and an elongated key received in said grooves so as to permit relative axial displacement but preclude relative rotational displacement of said sleeve and shaft.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |