Patents by Inventor Luis F. Welin

Luis F. Welin 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).

  • Belt-driven spray assembly for a dishwasher
    Patent number: 7870864
    Abstract: A dishwasher includes a spray assembly positioned in the wash chamber of the dishwasher's tub. The spray assembly includes a pump outlet that rotates relative to the bottom wall of the tub. One end of a flexible hose is secured to the pump outlet. The other end of the pump outlet is secured a belt that advances around a number of pulleys. Water is sprayed from the flexible hose via a number of nozzles.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: January 18, 2011
    Assignee: Whirlpool Corporation
    Inventors: Roger J. Bertsch, Andrei Tres, Luis F. Welin, Lorraine J. Westlake