US 9,808,742 B2
Filter arrangement
Michael Dedering, Morsbach (DE)
Assigned to IBS Filtran Kunststoff-/Metallerzeugnisse GmbH, Morsbach (DE)
Filed by IBS Filtran Kunststoff-/Metallerzeugnisse GmbH, Morsbach (DE)
Filed on Oct. 26, 2012, as Appl. No. 13/661,513.
Claims priority of application No. 10 2011 117 163 (DE), filed on Oct. 28, 2011.
Prior Publication US 2013/0118964 A1, May 16, 2013
Int. Cl. B03C 1/30 (2006.01); B01D 29/01 (2006.01); B01D 29/56 (2006.01); B01D 35/06 (2006.01)
CPC B01D 29/01 (2013.01) [B01D 29/56 (2013.01); B01D 35/06 (2013.01); B03C 1/30 (2013.01); B01D 2201/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A filter arrangement for the filtration of oil, comprising:
a first filtration layer;
a second filtration layer; and
a spacer comprising first and second sides; and
a housing comprising an upper shell and a lower shell, the lower shell configured to receive a fluid flow and the upper shell configured to output said fluid flow;
wherein:
the spacer is in the form of a support grid comprising a plurality of grid elements;
the first side of the spacer faces the lower shell of the housing and the second side of the spacer faces the upper shell of the housing;
the first filtration layer is proximate to the first side of the spacer and the second filtration layer is proximate to the second side of the spacer, such that the first and second filtration layers are spaced apart by the spacer;
a plurality of intermediate chambers are present between the first filtration layer and the second filtration layer, each of the plurality of intermediate chambers comprising sides defined by a respective one of said plurality of grid elements, a bottom defined by said first filtration layer, and a top defined by said second filtration layer;
the first filtration layer comprises a plurality of flow apertures to serve as a filter bypass, wherein each one of said plurality of flow apertures is substantially aligned with a respective one of said intermediate chambers;
when said fluid flow is passed through said filter arrangement from said lower shell to said upper shell, a dead flow zone is present in each of said plurality of intermediate chambers, and in a region of said intermediate chamber proximate to one or more of the grid elements of said spacer;
at least the grid elements of said spacer comprise a permanently magnetic or a magnetisable material, such that when said fluid flow contains iron particles, at least a portion of said iron particles are removed from said fluid flow by the permanently magnetic or magnetisable material in said grid elements; and
the spacer comprises a plastic bonded magnet.