Patent ID: 8118175

Claim:
A filter device for filtering a liquid, the device comprising: a drum for receiving said liquid, said drum including a plurality of drum apertures and a drum headspace; a frame comprising a plurality of frame supports coupled to the drum; a plurality of adjacent filter segments positioned around the drum, each of the plurality of adjacent filter segments defining a cavity in fluid communication with at least one of the plurality of drum apertures and supported at a first side by a first frame support and at a second side by a second frame support; and a plurality of vent devices each extending between adjacent frame supports, the vent devices constructed and arranged to fluidly connect each of the filter segments to the drum headspace to inhibit formation of a vacuum in each of the filter segments, wherein each vent device comprises a fluid passageway extending between adjacent frame supports, said fluid passageway in fluid communication with the drum headspace, and wherein a drum end of said fluid passageway enters said drum headspace enabling air to enter said fluid passageway during rotation of said drum.