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1. US20070062859 - Graded particle-size retention filter medium for fluid filtration unit with improved edge seal

Amt Vereinigte Staaten von Amerika
Aktenzeichen/Anmeldenummer 11559134
Anmeldedatum 13.11.2006
Veröffentlichungsnummer 20070062859
Veröffentlichungsdatum 22.03.2007
Erteilungsnummer 7582209
Erteilungsdatum 01.09.2009
Veröffentlichungsart B2
IPC
B01D 29/31
BArbeitsverfahren; Transportieren
01Physikalische oder chemische Verfahren oder Vorrichtungen allgemein
DTrennen
29Filter mit während der Filtration stationären Filterelementen, z.B. Druck- oder Saugfilter, die nicht durch die Gruppen B01D24/-B01D27/171; Filterelemente hierfür
11Beutel-, Käfig-, Schlauch-, Röhren-, Hülsen- oder ähnliche Filterelemente
31selbsttragende Filterelemente
B01D 29/33
BArbeitsverfahren; Transportieren
01Physikalische oder chemische Verfahren oder Vorrichtungen allgemein
DTrennen
29Filter mit während der Filtration stationären Filterelementen, z.B. Druck- oder Saugfilter, die nicht durch die Gruppen B01D24/-B01D27/171; Filterelemente hierfür
11Beutel-, Käfig-, Schlauch-, Röhren-, Hülsen- oder ähnliche Filterelemente
31selbsttragende Filterelemente
33angeordnet für einwärts gerichtete Strömung der Filtration
CPC
B01D 69/12
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
69Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
12Composite membranes; Ultra-thin membranes
B01D 25/001
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
25Filters formed by clamping together several filtering elements or parts of such elements
001Making filtering elements
B01D 25/26
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
25Filters formed by clamping together several filtering elements or parts of such elements
22Cell-type filters
26Cell-type stack filters
B01D 29/111
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
29Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
11with bag, cage, hose, tube, sleeve or like filtering elements
111Making filtering elements
B01D 29/41
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
29Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
39with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
41mounted transversely on the tube
B01D 39/1607
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
39Filtering material for liquid or gaseous fluids
14Other self-supporting filtering material ; ; Other filtering material
16of organic material, e.g. synthetic fibres
1607the material being fibrous
Anmelder 3M Innovative Properties Company
Erfinder Pulek John L.
Larsen William A.
Paul C. Thomas
Schorr Clifford L.
Swiatek Francis J.
Artinyan Art
Vertreter Medved Aleksander
Titel
(EN) Graded particle-size retention filter medium for fluid filtration unit with improved edge seal
Zusammenfassung
(EN)

A fluid filtration unit having two or more filter medium layers and/or zones, at least one of the layers/zones having a different particle retention capability disposed on each side of a non-filtering separator element. The filter medium are presently preferably positioned such that each succeedingly distal filter layer or zone from the separator has a decreased particle retention capability than each proceeding filter layer or zone. The filter medium layer most proximal to the separator element may be separated from the separator by a support material for supporting such filter medium element and preventing collapsing of the medium into any separator conduit. At least one of the medium elements is formed from a material which swells in size due to fluid absorption with the various zones and the separator being operatively connected by a new and innovative edge seal. The new and innovative edge seal is presently preferably formed from a thermoplastic material having a modulus of elasticity which is sufficient to permit radial expansion of the edge seal when the unit medium swells in size.