US 9,808,749 B2 · Device for the suction filtration of fluids

Abstract

A device for the suction filtration of fluids, such as urea solutions for exhaust gas after-treatment systems, has a tank (2) storing the fluid, and a filter element (34) arranged in the tank and provided with a filter medium (32) separating the tank contents from a clean-side inner filter cavity (20). The filter cavity extends from the bottom (10) of the tank (2) to a filling level height (28) and corresponds to a part of the filling volume of the tank (2). On the filter cavity (20), a suction connection (22) discharges the cleaned fluid by a suction pressure corresponding to a system operating pressure. The filter element (34) is provided with a filter medium (32), which is air-impermeable if suction pressures are within the range of a low system operating pressure.

Claims14

Dependent claims

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.

1 more element

Dependencies are inferred from the claim text.

Device for the suction filtration of fluids

Life of this patent

Device for the suction filtration of fluids

Life of this patent

Abstract

Claims14