US 9,808,749 B2
Device for the suction filtration of fluids
Norbert Sann, Riegelsberg (DE); Viktor Josef Lauer, Nalbach (DE); Stefan Hennes, Hangard (DE); Michael Sakraschinsky, St. Ingbert (DE); Alexander Wohlers, Saarburg (DE); and Paul Seibold, Grainau (DE)
Assigned to HYDAC FILTERTECHNIK GMBH, Sulzbach/Saar (DE)
Appl. No. 14/424,211
Filed by Hydac Filtertechnik GmbH, Sulzbach/Saar (DE)
PCT Filed Jul. 25, 2013, PCT No. PCT/EP2013/002207
§ 371(c)(1), (2) Date Feb. 26, 2015,
PCT Pub. No. WO2014/032752, PCT Pub. Date Mar. 6, 2014.
Claims priority of application No. 10 2012 017 288 (DE), filed on Aug. 31, 2012.
Prior Publication US 2015/0202553 A1, Jul. 23, 2015
Int. Cl. B01D 35/00 (2006.01); B01D 35/027 (2006.01); F01N 3/20 (2006.01)
CPC B01D 35/005 (2013.01) [B01D 35/027 (2013.01); F01N 3/2066 (2013.01); F01N 2610/02 (2013.01); F01N 2610/1426 (2013.01); Y02T 10/24 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for suction filtration of fluids, the device comprising:
a tank storing a fluid to a filling level height corresponding to a part of a filling volume of said tank and having a bottom;
a filter element disposed in said tank, said filter element having a filter medium separating contents of said tank from a clean-side inner filter cavity inside said filter medium and extending from said bottom of said tank to the filling level height; and
a suction connection on said filter cavity discharging cleaned fluid from said filter cavity by suction pressures corresponding to system operating pressures said filter medium being air-impermeable within a range of the system operating pressures and the suction pressures, said suction connection being arranged at an end of said filter cavity spaced from said bottom of said tank.