Abstract: A reverse osmosis system including a proportioning flow control, for controlling brine flow from a pressure resistant vessel containing a membrane cartridge, which has ends of two small diameter duct portions enclosed inside a hollow body, which is separate from the pressure resistant vessel containing the membrane cartridge. Means, such as a unitary mass of solidified epoxy adhesive, seals the passage of each of the duct portions through a wall of the hollow body and leaves space within the hollow body with which the open ends of the small diameter duct portions communicate and which itself communicates with a relief valve connected to a collector or tank for storage of permeate from the membrane cartridge under elevated pressure.
Abstract: Sewage flows through an inflow pipe into a receiver. Large solids are trapped in the receiver, and dissolved and suspended materials pass with the waste water through apertures in the receiver wall. A lower portion of the receiver has a solid wall to trap fine heavy grits. The receiver is held suspended from a lower opening in an upward opening holder. When the receiver is full of solids, waste water flows through larger apertures in the holder. A cover of the holder is removed, and the receiver is withdrawn through an upper opening in the holder by a handle which extends from the receiver to the upward opening. One holder and receiver are mounted directly within a closed self-contained underground tank. Several tanks are coupled in parallel or series. The tanks are provided with aeration devices in a main portion and have a partition which forms a chlorifying portion with a sludge return at the bottom of the partition and a skimmer return at the top of the partition.
Abstract: A reverse osmosis water purifying device is provided with a flush water restrictor which serves to provide a suitable back pressure on the reverse osmosis membrane in order to affect the purification process. The device is designed for attachment to any source of pressurized water. The restrictor device consists of a capillary tube sized to provide a suitable ratio of flush water to purified water. A ball-type check valve surrounds the capillary tube at its point of exit and the ball valve may be dislodged in order to flush the membrane. The core of the membrane assembly is filled with activated charcoal in order to provide for a more efficient and complete purification.
Abstract: A portable eduction unit includes a tank, a single first hose for extending into a source of solids and liquid, such hose being connected to the tank through a check valve which opens in response to a partial vacuum in the tank. A hose within the tank has one end supported by a float and communicates with the first hose through a check valve that opens in response to pressurization of the tank, and a shut-off valve for controlling the flow between the first-mentioned hose and the check valves.
Type:
Grant
Filed:
November 7, 1978
Date of Patent:
July 22, 1980
Assignee:
Industrial & Municipal Engineering, Inc.
Abstract: An improved check valve is disclosed for use in a system for sequentially delivering primary and secondary solutions through a common conduit. The check valve comprises a hollow housing with an inlet and an outlet connected to an enlarged intermediate portion. Sealed at its periphery in the enlarged portion is a flexible diaphragm characterized by having foraminous means in at least its outer portion and imperforate means in its central portion. The imperforate means is spaced from a valve seat surrounding the passage at the inner end of the inlet so that when the primary solution flows from the inlet to the outlet, it will pass freely around the imperforate means and through the foraminous means. When an increase in pressure, even though slight, is exerted against the diaphragm caused by flow of the secondary solution in the direction of the outlet to the inlet, the diaphragm moves towards the inlet causing the imperforate means to seal against the valve seat and stop the flow of the primary solution.
Abstract: An improved gravitational separator for mixtures of immiscible liquids of different densities, particularly oil and water, includes a reaction member in the form of a dome or diaphragm immersed in more dense liquid to be separated and which floats upwardly in the more dense liquid under the influence of liquid of less density accumulated beneath the dome or diaphragm. A coalescer screen filter system is provided in the water outlet path in the separator, the coalescer screens being contained in a chamber provided with automatically operating, one-way, pressure responsive valves to ensure proper flow of water in a forward and backflush sense through the chamber. A flotation feature for the reaction member is provided, and the reaction member includes an auxiliary air chamber to prevent loss of a minimum desired residual layer of less dense fluid beneath the reaction member when air accumulates in this area. A specific inflow and outflow conduit arrangement is provided to minimize turbulence in the separator.
Abstract: A marine vessel is provided with a closed tank for gravity separation of oil and water. A boom extending laterally from the vessel sweeps the surface of a body of water on which the vessel floats and a skimmer associated with the boom skims surface oil and some water into a conduit leading to a manifold extending around the upper inner periphery of the tank. The manifold discharges upwardly into the tank through a multiplicity of ports, the tank preferably being completely filled with oil and/or water. Separated water is withdrawn from the bottom of the tank through a plurality of coalescing filters having large exposed coalescer screens. Hoods over the coalescers direct flow thereto to ensure uniform distribution of water and oil globules over their surfaces and direct coalesced oil toward the upper region of the tank in a concentrated stream. A pump withdraws the water from the tank and discharges it into the ambient water. Flow produced by the pump can be reversed for backwashing the coalescers.
Abstract: A self-cleaning filter includes a housing having a compressible filter element and a compression spring for applying spring pressure to the filter element. Unfiltered fluid, at line pressure, is forced upwardly through the filter element. Spring tension is overcome by line pressure during normal filtering operations to compress the spring and allow the filter element to maintain a relatively uncompressed condition during filtering. The spring tension is sufficient to automatically compress the filter element when line pressure is shut off to squeeze the filter element and flush out filtered particles from the filter element into a chamber below it. Separate agitators in the chamber rapidly spin and move in a random pattern throughout the chamber to keep the walls of the chamber clean from filtered particles during filtering operations. The chamber may have an automatic drain valve which automatically opens when line pressure is shut off to discharge filtered particles from the housing.
Abstract: A pressure differential sampling and filtering device and method comprising a tube adapted to hold a liquid to be filtered and an inner tube having a filter head adapted to be inserted into the tube and force the liquid up through the filter head into the inner tube is characterized by the employment of a filter head and by the inner tube being associated with and separable from a closed-end portion which then serves as a test tube when the assembly is inverted and the filter head separated therefrom.
Type:
Grant
Filed:
May 23, 1975
Date of Patent:
July 12, 1977
Assignee:
Denver Chemical Manufacturing Company
Inventors:
Donald R. Landers, Walter Greenfield, Peter D. Tukey
Abstract: A method is disclosed for isolating blood serum from clotted whole blood and for isolating blood plasma from mixtures of whole blood with anti-coagulants. The method comprises partially sinking an apparatus of the invention in the appropriate blood specimen, conveniently with the assistance of centrifugation.The apparatus of the invention comprises a hollow elongate body open at both ends. One end is partially closed with a filter member which prevents the passage of solid phase components of clotted whole blood and solid phase components of mixtures of blood with anti-coagulants but allows passage of blood serum or blood plasma.
Abstract: An oil filter having an elastomeric anti-drainback valve with an integral flap that deflects within the tolerance stack-up of the assembled filter parts to effect sealing in lieu of requiring, for example, the conventional metal spring bias.
Abstract: A blood collection and separator assembly of the type suitable for use in centrifuging blood to separate the plasma or serum, the light phase, from the cellular portion, the heavy phase. The assembly includes a collection container and a piston disposed therein for sealing off one phase from the other after centrifuging is terminated. The piston is formed having an average specific gravity heavier than the light phase of the blood. The piston is slidably disposed in the container with its outer surfaces in sealing contact with the inner surface of the container and is provided with means which, under centrifugal force, permit the light phase of the blood to pass the piston as the piston moves down through the light phase while retaining sealing engagement with the inner surface of the container. The piston is provided with means to stop the piston at a predetermined distance above the bottom of the container whereupon the piston can serve as an impervious barrier between the two phases of the blood.
Abstract: An evacuated tube having both ends closed has a centrifugally actuated slit type valve fixedly disposed between the ends for dividing the tube into upper and lower chambers. The valve is formed and arranged to provide a passageway between the upper and lower chambers when subjected to a centrifugal force of proper intensity and direction. Upon cessation of the force, the valve closes to provide a separation between the upper and lower chambers.