Patents by Inventor Roy Pease

Roy Pease 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).

  • Centrifugal pump having improvements in seal life
    Patent number: 4773823
    Abstract: Longer shaft seal life in centrifugal pumps is realized by returning liquid from the pressure side of the pump to the seal area via a passage formed in a rib of the housing wall, and without porting the impeller, so that pump efficiency is kept high and its self-priming ability is retained.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: September 27, 1988
    Assignee: Tolo, Inc.
    Inventor: Roy Pease