Patents by Inventor Bruce D. Gjerstad

Bruce D. Gjerstad has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Filter accessory for use in swimming pool water flow system
    Patent number: 6962655
    Abstract: A basket that is used in a pool cleaning system includes a flap that is biased closed and is opened against the bias by water flowing into the basket. When a pump drawing water out of a pool moves water through the basket, debris in the water is trapped in the basket. However, when the pump is shut off, any back flow of water associated with the pump shut off will not cause debris to move out of the basket because the flap will be shut by the bias and the backward movement of water.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: November 8, 2005
    Inventors: Bruce D. Gjerstad, David L. Gillespie