Patent ID: 9504938
Filing Date: 2016-11-29
CPC Classification: B01D,B29B,B29C

Claim Text:
1. A filtering device for viscous fluids, said filtering device comprising: a housing; a screen carrier element movably supported in said housing, said screen carrier element having a screen space; a filter element disposed in said screen space, said screen space and said filter element each having a dirty side and a clean side; a backwash channel in said housing, said backwash channel connected to said dirty side of said screen space; a partial channel in said housing, said partial channel having a linear partial section and an inner wall with an inner diameter; a discharge channel in said housing, said discharge channel having a discharge channel inlet and a discharge channel outlet, said partial channel configured to fluidly connect said clean side of said screen space to said discharge channel, said discharge channel branching off and extending away from said linear partial section at said discharge channel inlet; and a displacing piston disposed in said partial channel for movement between a production position and a backwash starting position, said displacing piston having a circumference defined by an outer wall with an outer diameter, said displacing piston having an inlet opening, an inner fluid line, and an outlet opening, said inner fluid line extending from said inlet opening to said outlet opening, said outlet opening located at said circumference of said displacing piston, said outer diameter of said displacing piston corresponding, at least in some regions, to said inner diameter of said partial channel,