Patent ID: 8277656

Claim:
A filter device comprising a housing ( 1 ), a stack of filter plates ( 10 , 11 ) arranged therein at a spacing from one another, an inlet ( 7 ) for a fluid to be filtered, an outlet ( 9 ) for a filtrate which is connected to an inside of the filter plates ( 10 , 11 ) in a conducting manner and a cavity extending through the stack and formed by recesses ( 13 ) in the filter plates ( 10 , 11 ), wherein the filter plate stack is arranged fixed to the housing and a centrifugal pump ( 14 ) having several impellers ( 15 ) is arranged within the filter plate stack, wherein an impeller ( 15 ) is respectively allocated to an intermediate space formed between adjacent filter plates ( 10 , 11 ) or to a group of adjacent intermediate spaces, the impeller impinging the intermediate space or the intermediate spaces with fluid, and wherein the impellers ( 15 ) arranged within the plate stack are surrounded by a tubular intermediate housing ( 18 ), which is seated in the cavity, connects to the plate stack in a sealing manner, and comprises openings ( 19 ) in the region of free spaces between adjacent filter plates, by which openings a pressure side ( 21 ) of an impeller ( 15 ) is connected to an allocated intermediate space in a fluid-leading manner.