Strainer device for filtering water to an emergency cooling system in a nuclear power plant
Patent 5426679 Issued on June 20, 1995. Estimated Expiration Date: 
July 12, 2014. 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.
July 12, 2014. 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 ReferencesFluidic filters Patent #: 4155850 InventorAssigneeApplicationNo. 273977 filed on 07/12/1994US Classes:376/313, By filters, ion exchangers, or absorbers210/98, Fluid current controlled cyclic system210/106, Filter cleaning210/460Attached to open end of pipeExaminersPrimary: Wasil, Daniel D.Attorney, Agent or FirmInternational ClassG21C 019/307Foreign Application Priority Data1994-04-20 SEAbstractA strainer device for filtering water to an emergency cooling system in a nuclear power plant containment area having a lower part which forms a pool in which the strainer device is mounted. The device includes a strainer housing with separate strainer walls between which a flexible strainer means operates. The unit is arranged to be kept in a first position when water is drawn through one of the strainer walls, in which position it interrupts the connection between the other strainer wall and a suction conduit. By inherent flexibility, a shield means is automatically switched over to a second position which opens the connection between the second strainer wall and the suction conduit, as soon as the first strainer wall is clogged by impurities to such an extent that a low-pressure arises in the space between the first strainer wall and the shield means unit, which low-pressure brings about the switching-over by its suction effect. | |
