Abstract: A dialysis membrane for hemodialysis having passages of uniform diameter and positioned uniform distances from each other.

Abstract: An earth drain which comprises a filter encased core having, on at least one base or web surface, a first array of discrete projections or studs of uniform height and a second array of discrete projections or studs of lesser height than the projections or studs of the first array. The projections or studs of the second array are so disposed between the projections or studs of the first array that, under relatively low pressures, the filter encasing the core is maintained in spaced relationship with the base or web of the core by the free ends of the first array of projections or studs and, at relatively high soil pressures, the filter material forced inwardly toward the base of the core is supported by the free ends of the studs of the second array and is thus maintained in spaced relationship with the base of the core, the spacing corresponding to the height of the second array of projections or studs.

Abstract: Apparatus for separating or classifying the contents of a flowing slurry comprising a descending flow surface having a low profile and associated therewith a relatively low head box, the latter of which is distinguished by a relatively restricted cross sectional area adjacent its top. The flow surface is characterized by screen sections successive of which differ in orientation and profile whereby to produce a compact structure having a high capacity for separation of liquid from a flowing slurry. The design of the head box is such to enable a fast and effective delivery of slurry in spite of the low head provided.

Abstract: A filter for use with sterile slurries or the like comprises a filter basket and means for suspending the filter basket inside a housing, the suspending means for the basket including a sealing O-ring. The O-ring is disposed so that it never comes into contact with the slurry and serves to seal off the space above the basket from the space below the basket so that positive pressure or a vacuum may be used to assist the filtration process. The bottom of the filter basket forms a filter plate and means are provided for supporting the bottom surface of the filter plate. This supporting means includes a distribution plate which is attached to the basket and which has a plurality of inverted T shaped ribs attached to its lower surface.

Abstract: An apparatus for draining whey from cheese curd. The cheese curd to be treated is contained within an open ended box or container and the lower end of the box is enclosed by a support plate while the upper end of the box is enclosed by a perforated lid. The support plate is provided with a plurality of drain holes and is also formed with a series of downwardly extending grooves which extend from the interior of the plate to the peripheral edge. The grooves are generally V-shaped in cross section and have a greater depth than width. During vacuum draining of the cheese curd, the whey is drained through the holes in the support plate as well as along the grooves to thereby provide improved drainage characteristics for the mass of cheese curd.

Abstract: A device for use with an internal combustion engine for reconditioning oil by removal of solid and liquid contaminants including a housing having an oil inlet at one end and an oil outlet at an opposite end and containing a filter for removal of solid matter, a preheating chamber, a vaporization chamber for removal of liquid contaminants, and a convex conical vaporization plate separating and defining the roof of the preheating chamber and the floor of the vaporization chamber. The vaporization plate has a plurality of concentric tiers. The upper innermost tier of the vaporization plate has a plurality of capillaries each of which opens to the top planar surface of the tier through an expansion cup defined within an upwardly protruding lip. An electrical resistance heater is supported above the vaporization chamber for heating the vaporization chamber, the vaporization plate, and the preheating chamber. A vent for vaporized contaminants extends through the upper end of the housing.

Abstract: A screen element for joining with other like elements in defining a screen surface over which liquid slurry embodying solids may flow for separating and classifying purposes, said screen element being designed to orient in a sense transverse to a slurry flow and having an elongate bar-like form a surface portion of which provides a segment of the screen flow surface, said element being characterized by at least one portion thereof intermediate its ends being laterally offset with respect to said ends, said laterally offset portion being configured to provide that the flow surface portion thereof has a progressively changing width intermediate its ends.

Abstract: A new and improved nonadjustable self-cleaning dewatering screen panel assembly suited to vibratory dewatering of fluid slurries containing fine particulate solid material is comprised of a rigid frame member and a substantially planar screen panel mounted within the frame and secured thereto under tension in both planar directions. The screen panel is a unitary one piece elastomeric sheet consisting of a plurality of pulsator portions and integral bordering stabilizer portions. The pulsator portions of the elastomeric panel are comprised of a multitude of substantially identical diaphram elements arranged in intimate, aligned and confronting relationship so as to present a smooth top screening surface.

Abstract: Milled screen units can be tack welded to existing pockets after the conventional screen has been removed or can be recessed into the top of modified pockets and tack welded. In both cases the construction of the screen unit permits minimal tack welding thus obviating the change in metallurgical structure normally present thereby reducing chemical fretting when used with active solutions and/or abrasive particles. The screen is formed from a cylinder in which the slits are milled. The sections are then cut from the cylinder and flattened so that the slits take up a cross sectional configuration having a narrow width on one side and gradually widening towards the other side thus preventing clogging during use.