DK146704B - ULTRA FILTRATION DEVICE - Google Patents
ULTRA FILTRATION DEVICE Download PDFInfo
- Publication number
- DK146704B DK146704B DK524877AA DK524877A DK146704B DK 146704 B DK146704 B DK 146704B DK 524877A A DK524877A A DK 524877AA DK 524877 A DK524877 A DK 524877A DK 146704 B DK146704 B DK 146704B
- Authority
- DK
- Denmark
- Prior art keywords
- filter
- medium
- filtrate
- filtered
- outlet
- Prior art date
Links
- 238000000108 ultra-filtration Methods 0.000 title claims description 5
- 239000000706 filtrate Substances 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 21
- 239000008280 blood Substances 0.000 claims description 5
- 210000004369 blood Anatomy 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims description 2
- 235000015278 beef Nutrition 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/082—Flat membrane modules comprising a stack of flat membranes
- B01D63/0822—Plate-and-frame devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/082—Flat membrane modules comprising a stack of flat membranes
- B01D63/084—Flat membrane modules comprising a stack of flat membranes at least one flow duct intersecting the membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/087—Single membrane modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/20—By influencing the flow
- B01D2321/2008—By influencing the flow statically
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- External Artificial Organs (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Description
(19) DANMARK(19) DENMARK
(12) FREMLÆGGELSESSKRIFT ου 146704 B(12) PRESENTATION WRITING ου 146704 B
DIREKTORATET FORDIRECTORATE OF
PATENT- OG VAREMÆRKEVÆSENETTHE PATENT AND TRADEMARKET SYSTEM
(21) Patentansøgning nr.: 5248/77 (51) Int.CI.3: B01D 31/00 (22) Indleveringsdag: 25 nov 1977 (41) Aim. tilgængelig: 27 maj 1978 (44) Fremlagt: 12 dec 1983 (86) International ansøgning nr.: - (30) Prioritet: 26nov 1976DE2653875 07apr1977DE2715733 (71) Ansøger: ‘SARTORIUS-MEMBRANFILTER GMBH; 3400 Goettingen, DE.(21) Patent Application No. 5248/77 (51) Int.CI.3: B01D 31/00 (22) Filing Date: 25 Nov 1977 (41) Aim. available: 27 May 1978 (44) Submitted: 12 Dec 1983 (86) International Application No: - (30) Priority: 26 Nov 1976DE2653875 07apr1977DE2715733 (71) Applicant: 'SARTORIUS-MEMBRANFILTER GMBH; 3400 Goettingen, DE.
(72) Opfinder: Walter ‘Franken; DE, Dietmar ‘Nussbaumer; DE, Horst ‘Perl; DE, Ludwig ‘Weickhardt; DE.(72) Inventor: Walter 'Franken; DE, Dietmar 'Nussbaumer; DE, Horst 'Perl; DE, Ludwig 'Weickhardt; THE.
(74) Fuldmægtig: Internationalt Patent-Bureau (54) Apparat til ultrafiltrering(74) Plenipotentiary: International Patent Office (54) Ultra filtration apparatus
Opfindelsen vedrører et apparat til ultrafiltrering, navnlig til filtrering af blod, bestående af mindst ét spalteformet filterkammer, derpå mindst den ene side er begrænset af et filtermedium, under hvilket der er et filterafløb, og som har en tilgang for det medium, der skal filtreres, og en afgang for ved filtreringen opkoncentreret medium.The invention relates to an apparatus for ultrafiltration, in particular for blood filtration, consisting of at least one slit-shaped filter chamber, which is at least one side limited by a filter medium, under which there is a filter drain, and which has an approach for the medium to be filtered. , and an exit for filtration-concentrated medium.
Et sådant kendt apparat består af et antal over hinanden liggende firkantede filterplader af plast. Hver filterplade har ^ på begge sine sider parallelt med længderetningen forløbende flige.Such a known apparatus consists of a plurality of superposed square filter plates of plastic. Each filter plate has ^ on both sides parallel to the longitudinal tab.
Ved to over hinanden anbragte filterplader ligger fligene på hinan-TAt two superimposed filter plates, the tabs lie on each other T
3 den og holder filtermediet imellem sig. Parallelt med fligene er q der udsparet riller, hvorpå filtermediet ligger, idet rummet mel- s· ι έ 3 2 146704 lem rillernes bund og filtermediet benyttes til afløb for filtratet. De mellem fligene og filtermedierne dannede, spalteformede filterkamre har en spaltehøjde, dvs. en afstand mellem de virksomme afsnit af filtermedier, på mindst 150 ym.3 and holding the filter medium between them. Parallel to the tabs are q grooves on which the filter medium lies, the space between the bottom of the grooves and the filter medium being used to drain the filtrate. The slit-shaped filter chambers formed between the tabs and the filter media have a slit height, ie. a distance between the effective sections of filter media, of at least 150 µm.
Det kendte apparat har den ulempe, at de spalteformede filterkamre er meget lange, hvilket kræver store trykforskelle mellem tilgangen og afgangen for filteret. De høje tilgangstryk fører til, at de enkelte bestanddele af apparatet kaster sig, dvs. at de mister deres formstabilitet, så at de ønskede spaltehøjder ikke mere kan opretholdes. Endvidere kan disse tilgangstryk føre til beskadigelser på organiske komponenter i det medium, der skal filtreres. Endvidere danner der sig ved det kendte apparat et sekundært filter på filtermediet ved udskillelse, hvorved filtreringsbetingelserne under driften bliver stadig ringere.The known apparatus has the disadvantage that the slit-shaped filter chambers are very long, which requires large pressure differences between the inlet and outlet of the filter. The high inlet pressures cause the individual components of the apparatus to collapse, ie. that they lose their shape stability so that the desired slit heights can no longer be maintained. Furthermore, these inlet pressures can lead to damage to organic components in the medium to be filtered. Furthermore, in the known apparatus, a secondary filter forms on the filter medium upon separation, thereby reducing the filtering conditions during operation.
Med opfindelsen tilsigtes tilvejebragt et apparat af den nævnte art, med hvilket der ved fornuftige trykforskelle mellem filtertilgangen og filterafgangen med enkle midler kan opnås filterydelser, der er konstante gennem lang tid, selv ved ekstremt små ensartede spaltehøjder.The invention is intended to provide an apparatus of the aforementioned kind with which, by sensible pressure differences between the filter inlet and the filter outlet, with simple means, filter services which are constant for a long time can be obtained, even at extremely small uniform gap heights.
Dette opnås ved apparatet ifølge opfindelsen ved, at der mellem filtermediet og den ene kammervæg er et i hovedsagen usammen-trykkeligt, formstabilt materialelag med en struktur, der udviser et antal forhøjninger, der har en fri bredde på op til 2,5 mm og en højde på mellem 0,1 og 0,5 mm.This is achieved by the apparatus according to the invention in that between the filter medium and one chamber wall is a substantially non-compressible, form-stable material layer having a structure exhibiting a number of elevations having a free width of up to 2.5 mm and a height between 0.1 and 0.5 mm.
Materialelaget består fortrinsvis af et vævet materiale med en fri maskevidde fra 0 til 2,5 mm og en trådtykkelse på 0,1 til 0,5 mm.The material layer preferably consists of a woven material having a free mesh width of 0 to 2.5 mm and a wire thickness of 0.1 to 0.5 mm.
Det på denne måde udformede apparat har den fordel, at det kan fremstilles på meget simpel måde, da det er tilstrækkeligt at anvende et vævet materiale fremstillet af plasttråde eller en i tilsvarende form præget tynd folie som underlag for filtermediet. Spaltehøjden dannes ved, at filtermediet ved overtryk på filteret og ved undertryk under filteret antager underlagets struktur. Herved danner der sig et antal ensartede strømningskanaler. Den opnåede spaltehøjde kan være meget lille og eksempelvis ligge på mellem 8 og 150 ym. Filterydelsen har vist sig yderst god ved langtidsforsøg.The apparatus designed in this way has the advantage that it can be manufactured in a very simple manner, since it is sufficient to use a woven material made of plastic wires or a thin film embossed in a similar form as a substrate for the filter medium. The slit height is formed by the filter media assuming the substrate structure under overpressure on the filter and under vacuum under the filter. This creates a number of uniform flow channels. The gap height obtained can be very small and, for example, be between 8 and 150 µm. The filter performance has proved extremely good in long-term experiments.
Den fri maskevidde ligger fortrinsvis mellem 0,5 og 2 mm, medens middeltrådtykkelsen fortrinsvis ligger mellem 0,2 og 0,3 mm, 146704 3 idet trådtykkelsen ved vævet materiale af plasttråde kan sættes lig med middeltråddiameteren.The free mesh width is preferably between 0.5 and 2 mm, while the mean wire thickness is preferably between 0.2 and 0.3 mm, the thickness of the wire being woven of plastic wires can be set equal to the average wire diameter.
Ved en foretrukket udførelsesform for apparatet er der i en udsparing i det vævede materiale et filtratafgangselement, der er forbundet med filtratafgangen.In a preferred embodiment of the apparatus, in a recess in the woven material there is a filtrate outlet element which is connected to the filtrate outlet.
Denne udførelsesform er særlig fordelagtig, når apparatet har flere filterkamre. I dette tilfælde er der flere i et hus anbragte filterelementer, der består af et materialelag med en struktur, der udviser et antal forhøjninger, som i det mindste på den ene side er dækket tætnende med filtermedium. På grund af denne struktur opnås der et stort antal berøringspunkter, ved hjælp af hvilke den yderst konstante spaltehøjde defineres nøjagtigt.This embodiment is particularly advantageous when the apparatus has multiple filter chambers. In this case, there are several filter elements arranged in a housing, consisting of a material layer having a structure which exhibits a number of elevations which are at least on one side covered sealingly with filter medium. Because of this structure, a large number of touch points are obtained by which the extremely constant gap height is precisely defined.
Ved et sådant apparat er der to filterelementer, som på den ene side er dækket af vedkommende kammervæg, medens de øvrige filterelementer på alle sider er dækket af filtermedium.In such an apparatus, there are two filter elements which are covered on one side by the respective chamber wall, while the other filter elements on all sides are covered by filter medium.
Ved dette apparat er fortrinsvis filtratafgangselementerne anbragt flugtende med filtratafgangen, idet de trykker filterelementerne tætnende mod hinanden.In this apparatus, the filtrate outlet elements are preferably arranged flush with the filtrate outlet, pressing the filter elements tightly against each other.
Tykkelsen af filtratafgangselementerne bestemmes i afhængighed af trådtykkelsen.The thickness of the filtrate outlet elements is determined depending on the wire thickness.
Filtratafgangselementerne kan i tykkelsesretningen passere tætnende gennem filtermediet eller filtermedierne.The filtrate outlet elements can pass in the thickness direction sealingly through the filter medium or filter media.
Ifølge endnu en udførelsesform for opfindelsen kan hvert f.ltratafgangselement have en gennemgangsåbning og med undtagelse af gennemgangsåbningen være tætnende dækket af filtermediet eller filtermedierne, hvorhos gennemgangsåbningerne er flugtende anbragt i forhold til hinanden og til filtratafgangen. De flugtende anbragte gennemgangsåbninger letter ved indføring af en stift monteringen af filterelementerne i den ønskede flugtende position.According to yet another embodiment of the invention, each filtrate outlet member may have a passage opening and, with the exception of the passage opening, be sealed covered by the filter medium or filter media, the passage openings being flush with each other and to the filtrate outlet. The flush-mounted passage openings facilitate the introduction of a rigid mounting of the filter elements in the desired flush position.
Ved en foretrukken udførelsesform for opfindelsen er filterelementerne cirkelformede og har en tilførsel i midten for mediet, der skal filtreres, afgangene for filtratet og det opkon-centrerede medium findes ved periferien.In a preferred embodiment of the invention, the filter elements are circular and have a feed in the center of the medium to be filtered, the outlets for the filtrate and the concentrated medium located at the periphery.
Ved det elastiske, porøse skiveformede filtratafgangselement bliver filterelementerne trykket tætnende mod hinanden. Detmedium, der filtreres, som f.eks. blod, kan altså ikke trænge ind i filtratkanalen. Filtratet kan flyde bort gennem den porøse tætning i kanalen.At the elastic, porous disc-shaped filtrate outlet element, the filter elements are pressed tightly against each other. The filtered medium, e.g. thus, blood cannot enter the filtrate channel. The filtrate can flow through the porous seal in the duct.
Ved en yderligere udførelsesform for opfindelsen er filterelementerne rektangulære, idet tilførslen for mediet, der skal 4 146704 filtreres, befinder sig ved den ene rand, medens afgangen for det opkoncentrerede medium befinder sig ved den modsatte rand.In a further embodiment of the invention, the filter elements are rectangular in that the supply of the medium to be filtered is at one edge while the outlet of the concentrated medium is at the opposite edge.
Apparatet med flere filterelementer kan fremstilles meget billigt, så at apparatet kan danne en typisk éngangsmodul. Montering af apparatet er yderst enkel. Der tilvejebringes to dele af huset med tilhørende tilslutninger, til hvilke over for hinanden liggende store indersider af filterelementerne i enderne anbringes, dvs. de filterelementer, ved hvilke den vævagtige overfladestruktur er præget i indersiden eller på et tilsvarende stykke vævet materiale. De fuldautomatisk i seriefremstilling fremstillede filterelementer indsættes ved hjælp af centreringsstifter i form af en pakke i den rigtige stilling i huset. Herefter svejses husets halvdele sammen under et sådant tryk, at filtratafgangselementerne ligger tætnende over for hinanden, og således at den ønskede nominelle spaltehøjde ved brug af apparatet opnås.The apparatus with several filter elements can be manufactured very cheaply so that the apparatus can form a typical disposable module. Mounting the appliance is extremely simple. There are provided two parts of the housing with associated connections to which opposite large inner faces of the filter elements are placed at the ends, i.e. the filter elements by which the tissue-like surface structure is embossed on the inside or on a corresponding piece of woven material. The fully automatic series-made filter elements are inserted by means of centering pins in the form of a package in the correct position in the housing. Thereafter, the halves of the housing are welded together under such pressure that the filtrate outlet elements are sealed to one another and so that the desired nominal slit height is obtained by using the apparatus.
Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 skematisk viser en første udførelsesform for et apparat ifølge opfindelsen, fig. 2 detaljen II i fig. 1, fig. 3 et længdesnit gennem en anden udførelsesform for apparatet ifølge opfindelsen, fig. 4 et filterelement til apparatet i fig. 3, fig. 5 et delbillede ovenfra af apparatet i fig. 3, fig. 6 et længdesnit i en tredje udførelsesform for apparatet, fig. 7 et filterelement til apparatet i fig. 6, og fig. 8 et billede ovenfra af apparatet i fig. 6.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 schematically shows a first embodiment of an apparatus according to the invention; FIG. 2 shows the detail II of FIG. 1, FIG. 3 is a longitudinal section through another embodiment of the apparatus according to the invention; FIG. 4 shows a filter element for the apparatus of FIG. 3, FIG. 5 is a top plan view of the apparatus of FIG. 3, FIG. 6 is a longitudinal sectional view of a third embodiment of the apparatus; FIG. 7 is a filter element for the apparatus of FIG. 6, and FIG. 8 is a top plan view of the apparatus of FIG. 6th
Det i fig. 1 viste apparat består af et hus med en første kammervæg 4 og en i afstand deroverfor liggende, dermed parallel, anden kammervæg 5. Kammervæggene 4 og 5 er forbundet med hinanden ved en rand 11. Kammervæggene 4 og 5 skal danne en cirkel.The FIG. 1, a housing with a first chamber wall 4 and a spaced apart parallel to it, the second chamber wall 5. The chamber walls 4 and 5 are connected to each other by a rim 11. The chamber walls 4 and 5 must form a circle.
I midten af den første kammervæg 4 er der en tilgang 1 for det medium, der skal filtreres. I nærheden af randen 11 er der i den første kammervæg 4 en afgang 2 for filtratet. Diametralt her overfor er der ved randen 11 en afgang 3 for det opkoncentrerede medium. På indersiden af den første kammervæg 4 er der et vævet materiale 6, idet det vævede materiale 6 på indersiden af kammervæggen 4 i stedet kan være præget således, at der opstår en struktur med et antal forhøjninger. I området ved tilgangen 1 er det 146704 5 vævede materiale 6 udsparet. Det vævede materiale 6 er på den . bort fra kammervæggen 4 vendende side tætnende lukket med et filtermedium 7. Filtermedier, der anvendes ved ultrafiltrering er kendt.In the center of the first chamber wall 4 there is an approach 1 for the medium to be filtered. Near the rim 11, in the first chamber wall 4 there is an outlet 2 for the filtrate. Diametrically opposite to this, at the rim 11 there is an exit 3 for the concentrated medium. On the inside of the first chamber wall 4 there is a woven material 6, the woven material 6 on the inside of the chamber wall 4 may instead be embossed such that a structure having a number of elevations is formed. In the area of approach 1, the woven material 6 is recessed. The woven material 6 is on it. away from the chamber wall 4 facing sealingly sealed with a filter medium 7. Filter media used in ultrafiltration is known.
Af den i fig. 2 viste detalje ses det, at der mellem trådene 10 i det vævede materiale 6 også er sammenhængende frie rum 9, selv om filtermediet 7 ved drifttrykket bliver trukket noget ned i de frie rum. Herved dannes spal'tehøjderne. Kammervæggen 4 berører det vævede materiale i krydsningspunkterne for vævningen. Således opstår spaltehøjden ud fra vævets dimensioner.From the one shown in FIG. 2, it is seen that between the threads 10 of the woven material 6, there are also free spaces 9, although the filter medium 7 is pulled slightly into the free spaces at the operating pressure. This creates the column heights. Chamber wall 4 touches the woven material at the intersection points of the weave. Thus, the slit height arises from the dimensions of the tissue.
Den ligger mellem 8 og 150 ym. Det i den centrale tilgang 1 tilførte medium fordeler sig og gennemstrømmer i henhold til pilene spalten 20 radialt udefter til ringkanalen 15, hvor det opkon-centrerede medium samler sig og føres bort gennem afgangen 3. Det gennem filtermediet 7 passerede filtrat strømmer langs de med hinanden forbundne frie rum 9 i det vævede materiale 6 til filtratafgangen 2.It is between 8 and 150 µm. The medium supplied in the central approach 1 distributes and flows according to the arrows the gap 20 radially outwards to the ring channel 15, where the concentrated medium collects and is passed through the outlet 3. The filtrate passing through the filter medium 7 flows along each other. connected free space 9 in the woven material 6 to the filtrate outlet 2.
Ved den i fig. 3-5 viste anden udførelsesform er der i stedet for det i fig.l viste eneste filterelement 12, som på den ene side er begrænset afcfen første kammervæg 4, to filterelementer 12. Det ene filterelement 12 er begrænset af kammervæggen 4, medens det andet er begrænset på den ene side af kammervæggen 5. Mellem filtermediumsiderne i disse filterelementer 12 er der to yderligere filterelementer 12a, der på begge sider er omsluttet af et filtermedium 7, der er svejst tæt sammen i en indre og ydre rand 14. Det ringformede, vævede materiale 6 har udsparinger, hvori der er indsat filtratafgangselementer 8, der i enderne bortset fra en gennemgangsåbning 13 er dækket af filtermedier 7. Gennemgangsåbningerne 13 i filtratafgangselementerne 8 er anbragt flugtende i forhold til hinanden og udmunder i afgangen 2.In the embodiment shown in FIG. 3-5, the second filter element 12 shown in FIG. 1, which is limited on the one side of the first chamber wall 4, has two filter elements 12. One filter element 12 is limited by the chamber wall 4, while the other is confined to one side of the chamber wall 5. Between the filter medium sides of these filter elements 12, there are two additional filter elements 12a, which are enclosed on both sides by a filter medium 7 welded tightly together in an inner and outer rim 14. The annular, woven material 6 has recesses in which filtrate outlet elements 8 are inserted, which at the ends except for a passage opening 13 are covered by filter media 7. The passage openings 13 in the filtrate outlet elements 8 are arranged flush with each other and open at the outlet 2.
Det gennem den centrale tilgang 1 tilførte medium, der skal filtreres, strømmer fra det centrale hulrum ind i spalterne 20, og i spalterne 20 radialt udefter, hvorved det bliver opkon-centreret. Herefter samles det i ringkanalen 15 og føres bort gennem afgangen 3. Det gennem filtermedierne 7 gående filtrat passerer gennem de frie mellemrum i det vævede materiale til filtratafgangselementerne 8, som filtratet passerer igennem, og over gennemgang såbningerne 13 og føres bort gennem filtratafgangen 2.The medium to be filtered through the central approach 1 flows from the central cavity into the slots 20, and into the slits 20 radially outward, thereby concentrating. Then it is collected in the annular channel 15 and passed through the outlet 3. The filtrate passing through the filter media 7 passes through the free spaces in the woven material to the filtrate outlet elements 8 through which the filtrate passes, and over the passage the openings 13 and is passed through the filtrate outlet 2.
Claims (2)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2653875A DE2653875C3 (en) | 1976-11-26 | 1976-11-26 | Device for ultrafiltration |
| DE2653875 | 1976-11-26 | ||
| DE2715733 | 1977-04-07 | ||
| DE2715733A DE2715733C2 (en) | 1977-04-07 | 1977-04-07 | Device for ultrafiltration |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK524877A DK524877A (en) | 1978-05-27 |
| DK146704B true DK146704B (en) | 1983-12-12 |
| DK146704C DK146704C (en) | 1984-05-21 |
Family
ID=25771191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK524877A DK146704C (en) | 1976-11-26 | 1977-11-25 | ULTRA FILTRATION DEVICE |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5367683A (en) |
| CA (1) | CA1125182A (en) |
| CH (1) | CH625423A5 (en) |
| DK (1) | DK146704C (en) |
| FR (1) | FR2371954B3 (en) |
| GB (1) | GB1555389A (en) |
| IT (1) | IT1088512B (en) |
| SE (1) | SE442169B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2847945C2 (en) * | 1978-11-04 | 1984-01-12 | Fresenius AG, 6380 Bad Homburg | Artificial kidney and process for their manufacture |
| US4264447A (en) * | 1979-06-26 | 1981-04-28 | Dorr-Oliver Incorporated | Ultrafiltration membrane assembly and bonding process therefor |
| AU526959B2 (en) * | 1980-07-23 | 1983-02-10 | Terumo Corp. | Blood filter with multi-mesh-core layers and residue outlet |
| EP0048901B1 (en) * | 1980-09-25 | 1985-07-31 | Terumo Corporation | Plasma separator |
| US4348283A (en) * | 1980-11-05 | 1982-09-07 | Purdue Research Foundation | Reciprocating dialyzer having spacers |
| DE3279765D1 (en) * | 1981-07-22 | 1989-07-20 | Du Pont | Plasmapheresis by reciprocatory pulsatile filtration |
| US4735726A (en) * | 1981-07-22 | 1988-04-05 | E. I. Du Pont De Nemours And Company | Plasmapheresis by reciprocatory pulsatile filtration |
| JPS5850963A (en) * | 1981-09-21 | 1983-03-25 | テルモ株式会社 | Serum separating apparatus |
| DE3276297D1 (en) * | 1981-11-03 | 1987-06-19 | Medicosmos Aps | Apparatus for separating a liquid into two fractions by means of semipermeable membranes |
| US4640776A (en) * | 1982-02-16 | 1987-02-03 | E. I. Du Pont De Nemours And Company | Plasmapheresis filtration module having pressure balancing and sealing means |
| US4639317A (en) * | 1982-02-16 | 1987-01-27 | E. I. Du Pont De Nemours And Company | Plasmapheresis filtration module having improved sealing means |
| US4769150A (en) * | 1982-02-16 | 1988-09-06 | E. I. Du Pont De Nemours And Company | Method and apparatus for plasmapheresis by reciprocatory pulsatile filtration |
| US4636312A (en) * | 1982-02-16 | 1987-01-13 | E. I. Du Pont De Nemours And Company | Plasmapheresis filtration module having improved end plate |
| JPS5990354U (en) * | 1982-12-10 | 1984-06-19 | 旭化成株式会社 | Agricultural non-woven fabric |
| JPS59206009A (en) * | 1983-04-30 | 1984-11-21 | ゲ−・カ−・エス・エス・フオルシユングス ツエントルム・ゲ−ストハフト・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Cushion filter membrane |
| JPH044815Y2 (en) * | 1985-03-28 | 1992-02-12 | ||
| JPH0722687B2 (en) * | 1985-08-06 | 1995-03-15 | 富士環境設備株式会社 | Membrane set for fluid separation device |
| FR2931081B1 (en) * | 2008-05-14 | 2010-06-25 | Direction Et Pirorites | DEVICE FOR FILTRATION OF A COMPLEX LIQUID SUCH AS BLOOD, IN PARTICULAR APPLICABLE TO AN AUTOSFUSER |
| JP6715038B2 (en) * | 2016-03-09 | 2020-07-01 | 学校法人慶應義塾 | Blood filter |
-
1977
- 1977-10-12 SE SE7711450A patent/SE442169B/en not_active IP Right Cessation
- 1977-10-19 GB GB43592/77A patent/GB1555389A/en not_active Expired
- 1977-10-26 CH CH1302577A patent/CH625423A5/en not_active IP Right Cessation
- 1977-11-22 JP JP13953877A patent/JPS5367683A/en active Granted
- 1977-11-23 FR FR7735144A patent/FR2371954B3/fr not_active Expired
- 1977-11-23 IT IT29941/77A patent/IT1088512B/en active
- 1977-11-25 CA CA291,736A patent/CA1125182A/en not_active Expired
- 1977-11-25 DK DK524877A patent/DK146704C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2371954A1 (en) | 1978-06-23 |
| JPS579841B2 (en) | 1982-02-23 |
| IT1088512B (en) | 1985-06-10 |
| FR2371954B3 (en) | 1980-08-29 |
| SE442169B (en) | 1985-12-09 |
| CA1125182A (en) | 1982-06-08 |
| JPS5367683A (en) | 1978-06-16 |
| SE7711450L (en) | 1978-05-27 |
| CH625423A5 (en) | 1981-09-30 |
| DK524877A (en) | 1978-05-27 |
| DK146704C (en) | 1984-05-21 |
| GB1555389A (en) | 1979-11-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |