Patent ID: 7404895
Filing Date: 2008-07-29
Classification: B01D

Abstract:
1. A filter apparatus for separating particles from a liquid, comprising a tank with a feed inlet, a gravitational settling zone and a filtration zone disposed downstream thereof, wherein the tank is equipped with two transversely spaced-apart, driven, endless chains with transversely extending drivers are provided between the chains, said chains and drivers forming a conveying apparatus driven by gear wheels and a drive motor, and wherein the filter apparatus has a vacuum chamber formed partly by the tank and arranged underneath the filtration zone, and a filter media strip is disposed between an unfiltered liquid region and a filtered liquid region and is moved through the tank along a path which changes direction by conveying apparatus, wherein each chain or each driver has flexible metal strips provided thereon, said strips extending along the chain over a plurality of chain links, each said strip being fixed at one end and partially overlapping with a succeeding strip, said strips exerting a force directed toward the filter media strip which ensures formation of a seal between the filtered liquid region and the unfiltered liquid region in the area where the moving filter media strip changes direction.