Patent ID: 8348063

Claim:
A filter system backflush device comprising: at least one backflush nozzle configured in a filter system for applying a rinse medium to a filter body that separates a clean side of the filter system from an inlet side in the filter system, wherein the backflush nozzle has at least one opening through which the rinse medium flows in a flow direction and exits from the backflush nozzle during backflushing, the opening is configured as an elongate slit opening which extends in a straight line in a vertical direction transverse to the flow direction, the opening has a constant cross-sectional profile corresponding to cross-sections orthogonal to the vertical direction, the opening comprises a nozzle segment in which cross-sectional profiles of the opening, corresponding to cross sections orthogonal to the flow direction, expand in the flow direction, the opening comprises an entry segment in which cross-sectional profiles of the opening, corresponding to cross sections orthogonal to the flow direction, expand in a direction opposite to the flow direction, and the entry segment is upstream from and adjoins the nozzle segment.