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| Number | Title | Issue Date |
| 4269708 | Hemodialysis and/or ultrafiltration apparatus Portable hemodialysis apparatus which can be used for dialysis and/or ultrafiltration, or hemoperfusion. Separate circuits are provided for blood and for the ultrafiltrate and the dialysis solution. The blood circuit includes a pump in which the flexible ... | 05/26/1981 |
| 4267041 | Apparatus for the ultrafiltration control in connection with the hemodialysis An apparatus for controlling the ultra-filtration in connection with a hemodialysis treatment comprises a plurality of storage containers for the dialysis liquid. These containers are connected in parallel to each other and to the circulatory system of th... | 05/12/1981 |
| 4267040 | Hemodialysis apparatus The ultra-filtration in a hemodialysis operation is controlled by a control apparatus which is connected to a balancing device (1) and to a dosing device (9) to form a closed loop control circuit for the metered supply of dialysis concentrate into the bal... | 05/12/1981 |
| 4243523 | Water purification process and system Apparatus is described for purifying or desalinating relatively small quantities of water using one or a few membrane units with relatively modest power requirements. The apparatus uses a pump, an eductor or a combination of both in recirculating a portio... | 01/06/1981 |
| 4227999 | Ultrafiltration process and apparatus In the ultrafiltration of liquids such as vinegar, wine, etc., the liquid to be filtered is fed from and back to a circulating tank through at least one filtration circuit including at least two serially connected, vertically spaced, non-horizontal filter... | 10/14/1980 |
| 4222870 | Ultrafiltration apparatus and method Method and apparatus for the constant volume solvent exchange or constant volume neutralization of a liquid solution or suspension of macromolecules. Liquid enters a bulk zone and passes into a thin layer filtration zone, in which the separation is effect... | 09/16/1980 |
| 4190537 | Water storage control for reverse osmosis system A reverse osmosis system employs a tank for storing permeate under a pressure which is a portion of the pressure of feed water introduced into a pressure resistant container housing a semipermeable membrane cartridge. Control means such as an automatic va... | 02/26/1980 |
| 4180460 | Portable machine for regenerative dialysis A portable machine for regenerative dialysis comprises a dialyzing liquid reservoir in which is immersed a suction duct connected to a heating tube the temperature of which is controlled by a thermal probe pair piloting a temperature adjusting element. Th... | 12/25/1979 |
| 4176063 | Water purifier system and valve An economical and commercially practical reverse-osmosis water purifier system which has no back pressure acting against the semipermeable membrane, so that the filtering rate is maximized. Furthermore, the supply of tap water to the system is shut off au... | 11/27/1979 |
| 4169789 | Process and apparatus for purifying sea water by reverse osmosis Sea water is purified by reverse osmosis in an offshore installation wherein sea water is withdrawn from the sea by a low pressure pump and passed through plural-stage physical filters having decreasing degrees of porosity to remove suspended particles an... | 10/02/1979 |
| 4160727 | Method and apparatus utilizing staged reverse osmosis units for purifying and dispensing water Method and apparatus utilizing successive reverse osmosis stages to produce highly purified water from potable water in a manner particularly suitable for use in a coin operated vending machine. The flow rates in the reverse osmosis stages are matched so ... | 07/10/1979 |
| 4145279 | Water recycling system A closed water recycling system produces portable drinking water from total domestic waste-water, including household sewage. A microprocessor monitors the operation of the system and automatically back-flushes the ultra-filter assembly, regenerates the i... | 03/20/1979 |
| 4136029 | Pressure filtration device A pressure filtration apparatus including an upper portion with an inflow channel and a discharge channel for the concentrate and a lower portion with a filter support and a discharge channel for the filtrate, the upper and lower portions being releaseabl... | 01/23/1979 |
| 4111812 | Recovering surfactant In one aspect a process for breaking an oil/water/surfactant emulsion obtained from an oilfield after chemical flooding comprises ultrafiltering the emulsion. In another aspect the oil and water phases produced from the emulsion so broken are further trea... | 09/05/1978 |
| 4110219 | Reverse osmosis water unit A portable water container for holding water treated by reverse osmosis water purification, which container rests on a base. The base has a recess in which a reverse osmosis unit is laid, with water connecting means for supplying water to the portable wat... | 08/29/1978 |
| 4105556 | Liquid waste processing system A reverse osmosis liquid waste processing system for purifying liquid waste. The liquid waste processing system comprises a liquid waste collection tank with a recirculation line containing an eductor for permitting the addition of chemical additives, a f... | 08/08/1978 |
| 4086166 | Water filtering and dispensing apparatus A water filtering and dispensing apparatus comprising a filtering device receiving unfiltered water under pressure from a water service system and operable to deliver filtered water and waste brine under pressure, a filtered water delivery line extending ... | 04/25/1978 |
| 4069155 | Hemodialysis system A hemodialysis system for use with any type of dialyzer, such as coil-type, Kiil-type and capillary-type or hollow fiber-type dialyzers, which has a fluid circulation circuit and a bypass circuit short-circuiting the fluid circulation circuit. At one junc... | 01/17/1978 |
| 4024059 | Artificial kidney An artificial kidney in which blood is pumped to and from a first compartment of a dialysis apparatus and dialysis liquid is pumped to and from a second compartment thereof. The hydrodynamic resistance within these compartments is arranged so that one sim... | 05/17/1977 |
| 4021343 | Water purifier This invention provides an arrangement for delivering purified water on demand, which includes a reverse osmosis filter having an inlet for connection to a source of pressurized water, and a purified water outlet connected to a tank where the purified wat... | 05/03/1977 |
| 4014792 | Air and light impervious water purification and product dispensing system A closed system of cyclically storing and dispensing nearly pure water discharged from a reverse osmosis module which is free from exposure to light and air.... | 03/29/1977 |
| 4003710 | Chemical feeder for water softeners A self-contained unit for regenerating chemicals used with water softeners and the like. The unit is quickly attachable to and detachable from a water treatment system.... | 01/18/1977 |
| 3973987 | Water recycle treatment system for use in metal processing A water recycle treatment system comprising two main treatment sub-systems for treatment of contaminated water from a plurality of concentrated solutions and rinse baths to separate out the impurities therein. A first sub-system treats less concentrated s... | 08/10/1976 |
| 3967638 | Combination faucet and air gap A combination faucet and antisyphon break or air gap for dispensing purified water produced by a membrane type purification unit, has a body having a valve-controlled passage with a spout for dispensing purified water; and a pair of additional vertical pa... | 07/06/1976 |
| 3959146 | Reverse osmosis system with automatic flushing A reverse osmosis system which includes a purified water storage tank, has a by-pass pipe around the concentrate flow control of its membrane module and a normally closed valve in the by-pass pipe. The by-pass pipe valve is opened automatically when purif... | 05/25/1976 |
| 3939074 | Apparatus for control of a reverse osmosis system A reverse osmosis system having a tank for storing purified water includes a valve in the pipe which introduces feed water into a module containing a semipermeable membrane and which produces the purified water. The valve shuts off or turns on introductio... | 02/17/1976 |
