Abstract: The invention relates to a filtering apparatus for removing matter and bodies accompanying a liquid flow. The filtering apparatus includes a number of individual filter elements disposed to be displaced in an endless path. The endless path is formed by one or more arcs in relation to which the filter elements are displaceable. A drive is provided for displacing one filter element at a time past a scraper device for removal of matter accumulated against the filter element.

Abstract: A method and apparatus for separating contaminating substances from a liquid containing contaminating substances in which the liquid is passed through a filter of resilient, porous filter material. The contaminating substances are separated from the liquid in the filter whereafter the filter is displaced to a position out of the liquid flow. In this displaced position, the filter material is compressed to squeeze out liquid retained in the filter together with separated substances retained in the filter by opposed frustoconical rollers. After the compression has ceased, the filter is moved to a position where the liquid once again passes through the filter material for renewed separation and accumulation of contaminating substances in the liquid.

Abstract: A method and an apparatus for separating bodies from a liquid in which the liquid is passed through a filter and the bodies to be separated are accumulated on the filter. The filter forms an upper bounding limit of a space therebeneath which is alternately subjected to pressure and vacuum relative to the ambient region above the filter. This is achieved according to one embodiment by producing a reciprocal movement of the filter in the form of an oscillating or pendular movement. The pressurization in the space produces separation of the bodies accumulated on the upper surface of the filter to facilitate their discharge from the filter. The separated bodies can be assisted for discharge by mechanical elements and/or by producing wave motion in the liquid.