Abstract: The invention relates to a fluid or liquid settling and pressing tank for materials containing liquid, like grape, fruit mash or the like, in the most diverse forms, for example as cylinders, polygons, spheres of the like, with pressing systems arranged in the interior in the form of an elastic membrane which can be pressed by means of compressed air or hydraulic pressure into the interior of the container, also comprising loading and discharge apertures, whereby the container is rotated about its axis and designed as a closed container having immediately ahead of the one frontal wall and/or at a distance from the container jacket, a screen bottom.

Abstract: Oil-water separation apparatus having a flow-through chamber containing a block of foam filter material regenerable by squeezing, a pair of perforated end plates located on either side of the foam block within the chamber at least one of which responds to applied pressure to squeeze the foam, and a flexible envelope of impervious material surrounding the foam block between the block and the inside walls of the chamber and connected at each end to the plates to avoid channeling and friction between the foam block and the walls of the chamber.

Abstract: Apparatus for continuous separation of solid-fluid mixtures comprising means for routing an endless band of filter cloth folded to form an endless tube which is longitudinally openable and closable to permit introduction of a mixture into the tube for filtering, and removal of solids following filtering. Means for introducing a mixture into the tube are followed by a filter unit which is adjustable in cross sectional flow area. The inlet means and filter unit are assembled on a first frame. A second frame outfitted with means for opening the tube for discharge of solids follows. The two frames are separable to provide a modular construction. Press units, also of modular construction, can be interposed between said frames, also as modules, and means are provided for adjusting the pressure exerted by the press units.

Abstract: My invention permits very small pore filtration of blood by means of a high capacity "two-dimensional" filter of round pores of twelve to fifteen microns in diameter. The viscous blood and its cells and platelets are forced through these minute orifices by means of a pressure applied to the flexible bag of donor blood, a rigid connecting passageway, and to a flexible pleated solid sheath which covers the filter but which is sealed to the outer portion of the connecting passageway and to the periphery of the filter. These flexible portions are first emptied of air by means of a vacuum applied from below through the filter and then the blood is evenly maintained above this large filter by means of producing a slowly rotating swirling wave of blood. The blood is collected by gravity funnel drainage into a receiving bottle. Any frothed blood which enters this receiving bottle is removed from its top by vacuum aspiration.

Abstract: A filter apparatus for slurries or the like broadly comprises a filter drum housing an accordion-type filter medium, and a cylinder actuator coaxially connected to the filter drum. The accordion filter medium includes a filter screen supported in the form of a bellows between a pair of opposed end plates slidable through the filter drum, one of the end plates being normally held at an open end of the filter drum. The cylinder actuator includes at least one piston rod projecting into the filter drum and connected to the said one end plate by slidably extending through the other end plate. A slurry enters the filter drum through its circumference, passes through the filter screen, and leaves the drum through the one end plate of the filter medium. Sludgy filter cake deposited on the filter screen is compacted and dehydrated as the end plates are moved toward each other by the cylinder actuator, and is removed from the screen as the cylinder actuator further operates to move the filter medium out of the drum.

Abstract: A method of removing solid particles, especially magnesium compounds, from the pores of the filter element of a tube pressure filter, by (A) washing the filter element whilst supported in the tube pressure filter with an aqueous cleaning solution containing a compound which reacts with the solid particles in the pores of the filter element to form a material which is at least partially soluble in said aqueous cleaning solution, and thereafter (B) washing the filter element whilst supported in the tube pressure filter with water or an aqueous solution of a soap or a detergent.

Abstract: Apparatus for dewatering agricultural effluent slurries comprises an endless belt dewatering screen of thin flexible inextensible material, and opposed pressure rollers to apply wringing pressure to the screen and slurry thereon. A rotary brush is provided to remove dewatered material from the screen and the slurry is aerated before entry on to the screen.

Abstract: One of at least two different spring filters comprises a helically grooved hollow mandrel with holes in the grooves and a helical spring closely fitted therearound. The pitch of the spring convolutions is opposite to that of the mandrel grooves so that the mandrel provides lateral support to the spring equivalent to that provided by a solid cylindrical bar for maintaining uniform diameter and concentricity of the spring convolutions while eliminating lateral displacement thereof during high load operations. While this filter is secured at its bottom to the well, a modification requires securing thereof only at its top to the well with a packer. Further, full width spacers are formed on the spring convolutions for precise separation thereof and for preventing twisting and lateral displacement of the individual convolutions and for prevention of any variation of the gauge between the adjacent helical spring convolutions particularly while under magnified loads.