Patents Assigned to SWAF, Inc.
  • Combination above grade automatic method of stormwater separation and filtration
    Patent number: 6171507
    Abstract: A method and system for treating stormwater runoff containing impurities includes collecting the runoff in a basin and allowing the runoff to settle in the basin for a predetermined time before allowing the filtration step to be initiated. The time delay is controlled by a controller sensitive rain fall, turbidity, or other variables selected by the user. During the filtration step a separator member is positioned floatingly between a filter element and impurities floating on the surface of the unfiltered water.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: January 9, 2001
    Assignee: SWAF, Inc.
    Inventors: John R. Roy, David L. Earl, William L. Hamrick, Philip G. King
  • Combination above grade automatic stormwater separation filtration system and method of separation and filtration
    Patent number: 6077423
    Abstract: A method and system for treating stormwater runoff containing impurities includes collecting the runoff in a basin and allowing the runoff to settle in the basin for a predetermined time before allowing the filtration step to be initiated. The time delay is controlled by a controller sensitive to rain fall, turbidity, or other variables selected by the user. During the filtration step a separator member is positioned floatingly between a filter element and impurities floating on the surface of the unfiltered water.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: June 20, 2000
    Assignee: SWAF, Inc.
    Inventors: John R. Roy, David L. Earl, William L. Hamrick, Philip G. King