Patents Assigned to David C. Lake
  • Filter cleaning apparatus
    Patent number: 4834883
    Abstract: The filter tubes of a swimming pool filter are cleaned by a spray nozzle connected to a high pressure water source and carried on the end of a wand adapted to be inserted slidably through the drain valve and moved back and forth to cause the spray nozzle to traverse back and forth beneath the tubes. Dirty water from the filter is discharged around the wand and through the drain valve.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: May 30, 1989
    Assignee: David C. Lake
    Inventor: Joseph A. Lake