Valve assembly of a reverse osmosis water purification system
January 5, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3794173 3821108 Membrane transfer process and apparatus Water purifier Method and apparatus utilizing staged reverse osmosis units for purifying and dispensing water Water purifier system and valve Brine flow control for membrane separation system Reverse-osmosis water purifier apparatus and method Reverse osmosis liquid treating apparatus Combined purified water dispensing device and reject water control device InventorApplicationNo. 583405 filed on 01/05/1996US Classes:210/134, Plural elements controlled210/90, Fluid pressure responsive210/136, Check valve210/195.2, With semipermeable membrane, e.g., dialyzer, etc.210/257.2, Having membrane210/433.1Divided filtered, and unfiltered liquid passagesExaminersPrimary: Fortuna, AnaAttorney, Agent or FirmInternational ClassesB01D 021/30B01D 063/00 AbstractA valve assembly for a reverse osmosis water purifier system that contains all of the control and check valves required for the system. The valve assembly is operative to provide squeeze water pressure to a pure water storage tank for providing delivery pressure to the pure water, for venting squeeze water to drain during purification, for turning on the tap water line during purification and dispensing and to shut off the tap water at all other times, to provide a flow of bleed or waste water through the reverse osmosis unit during purification and not at other times, including but not being limited to during dispensing, to provide a check valve in the pure water line to the dispensing head to maintain pressure in that line during purification when the pure water pressure in the accumulator tank is very low, and to provide a check valve between the pure water outlet of the reverse osmosis unit and the pure water connection to the pure water accumulator tank to prevent back pressuring the reverse osmosis unit membrane.Field of SearchHaving membraneCheck valve With semipermeable membrane, e.g., dialyzer, etc. Plural elements controlled Fluid pressure responsive CASING DIVIDED BY MEMBRANE INTO SECTIONS HAVING INLET(S) AND/OR OUTLET(S) Divided filtered, and unfiltered liquid passages Hyperfiltration (e.g., reverse osmosis, etc.) PRESSURE MODULATING RELAYS OR FOLLOWERS Plural pumps having separate drive motors, supply sources, or delivery destinations PROCESSES Diaphragm PLURAL PUMPS WITH INDIVIDUAL OR RELATIVE CONTROL Having pulsation dampening fluid receiving space | |
