Patent US5141832A successfully refreshed from Google Patents.
Patent US4995977A successfully refreshed from Google Patents.
US4995977A
Expired / Lapsed
US
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Apparatus for filtering and separating flow medium
Assignee: GKSS Forshungszentrum Geesthacht GmbH
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Filing: 1989-02-09
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Granted: 1991-02-26
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Expires: 2009-02-09
Abstract
Abstract An apparatus for filtering and separating flow medium by reverse osmosis, ultrafiltration, and microfiltration. A plurality of essentially sheet-like filter elements are disposed next to, and spaced from, one another so a to form flow chambers for the flow medium. Filtrate that is produced is withdrawn at the end face of at least one hole formed in a filter element and disposed at essentially right angles to the planar surface thereof. A plurality of sheet-like, self-supporting filter element carriers that are successively arranged have disposed essentially laminarly thereon the filter elements, with the filter element carriers being spaced from one another at such a distance that there is formed between each two facing filter elements one of the flow chambers. Disposed in each flow chamber, between two facing filter elements, is a disk that imparts turbulence to flow medium in the flow chamber.
Inventors
- 👤 Walter Hilgendorff
- 👤 Gerhard Kahn
- 👤 Jurgen Kaschemekat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:26
CPC Classifications
B; B01; B01D; B01D65/00; B01D65/08; B01D63/00; B01D63/08; B01D63/082; B01D63/084; B01D2321/00; B01D2321/20; B01D2321/2008; B01D2321/2016
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
215 words
In an apparatus for filtering and separating flow medium by reverse osmosis, ultrafiltration, and microfiltration, with a plurality of essentially sheet-like filter elements being disposed next to, and spaced from, one another in such a way as to form respective flow chambers for the flow medium, and with filtrate that is produced being withdrawn at the end face of at least one hole formed in a filter element and disposed essentially at right angles to the planar surface of that filter element, the improvement comprising: a plurality of sheet-like, self-supporting, filter element carriers that are successively arranged and have opposite sides, upon each interior one of which is disposed essentially laminarly a respective one of said filter elements, with said carriers being spaced from one another by such a distance that when said filter elements are disposed thereon, one of said flow chambers is formed between each two facing filter elements; and disposed in each flow chamber, between two facing filter elements, a respective disk that imparts turbulence to said flow medium in said flow chamber, with a given one of said disks being disposed between two filter elements in such a way that said disk essentially does not contact said two filter elements and also is movable in at least one axis of freedom.
Claim 2
Dependent Claim
215 words
In an apparatus for filtering and separating flow medium by reverse osmosis, ultrafiltration, and microfiltration, with a plurality of essentially sheet-like filter elements being disposed next to, and spaced from, one another in such a way as to form respective flow chambers for the flow medium, and with filtrate that is produced being withdrawn at the end face of at least one hole formed in a filter element and disposed essentially at right angles to the planar surface of that filter element, the improvement comprising: a plurality of sheet-like, self-supporting, filter element carriers that are successively arranged and have opposite sides, upon each interior one of which is disposed essentially laminarly a respective one of said filter elements, with said carriers being spaced from one another by such a distance that when said filter elements are disposed thereon, one of said flow chambers is formed between each two facing filter elements; and disposed in each flow chamber, between two facing filter elements, a respective disk that imparts turbulence to said flow medium in said flow chamber, with a given one of said disks being disposed between two filter elements in such a way that said disk essentially does not contact said two filter elements and also is movable in at least one axis of freedom.
Claim 3
Dependent Claim
29 words
An apparatus according to claim 1, in which each of said disks is provided with a plurality of openings that essentially extend perpendicular to the surfaces of said disk.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 2, in which each of said openings has a semicircular cross-sectional configuration.
Claim 5
Dependent Claim
30 words
An apparatus according to claim 2, in which each of said disks is provided with a fixing hole that essentially extends axially relative to said hole of said filter element.
Claim 6
Dependent Claim
68 words
An apparatus according to claim 4, in which said fixing hole of said disk has a center in which is disposed a spacer, the thickness of which is greater than the thickness of said disk, with said disk being supported on said spacer via the interposition in said fixing hole, of an annular sealing member, and with said disk being supported between two filter elements via said spacer.
Claim 7
Dependent Claim
39 words
An apparatus according to claim 2, in which each of said filter elements, on a surface thereof that faces a flow chamber, is provided with a plurality of projecting members that project beyond said surface of said filter element.
Claim 8
Dependent Claim
70 words
An apparatus according to claim 6, in which said filter element has a radially outer rim portion, with said projecting members including an annular member that extends about said filter element at said outer rim portion thereof, and with said projecting members also including an annular protuberance of said filter element that projects therefrom to essentially the same extent and in the same direct ion as does said annular member.
Claim 9
Dependent Claim
17 words
An apparatus according to claim 7, in which said annular member is formed by an adhesive layer.
Claim 10
Dependent Claim
28 words
An apparatus according to claim 7, in which said projecting members further include a plurality of point-type projections that are distributed over said surface of said filter element.
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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |