Self-cleaning siphon-actuated radial flow filter basket

  • US 6,027,639 A
  • Filed: 01/12/1998
  • Issued: 02/22/2000
  • Est. Priority Date: 04/30/1996
  • Status: Expired due to Term
First Claim
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1. A basket filter for removing pollutants from storm water runoff, the apparatus comprising:

  • (a) a housing, the housing having a means for admitting air from the surroundings into the housing, said means located near a base of the housing;

    (b) a bed of material for treating water, contained within the housing, the bed having an annular shape;

    (c) a drainage space located in the annular space of the bed, the drainage space in fluid communication with the bed;

    (d) a filter medium surrounding the bed; and

    (e) an outlet duct extending from the drainage space, the duct comprising a flow control valve;

    said flow control valve being adapted to partially cover an opening of the outlet duct and thereby restrict flow of treated storm water from the drainage space through the outlet duct and comprising a linkage extending from the valve member to a float mounted above the drainage space, the float being in fluid communication with the drainage space so that when the drainage space fills with storm water, the float rises to lift the valve member and open the outlet duct of the basket.

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