Fluidic filters Patent #: 4155850
ApplicationNo. 273977 filed on 07/12/1994
US Classes:376/313, By filters, ion exchangers, or absorbers210/98, Fluid current controlled cyclic system210/106, Filter cleaning210/460Attached to open end of pipe
ExaminersPrimary: Wasil, Daniel D.
Attorney, Agent or Firm
International ClassG21C 019/307
Foreign Application Priority Data1994-04-20 SE
AbstractA 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.