Patents by Inventor Louis Cardoso

Louis Cardoso 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).

  • Debris-resistant hydropneumatic valve
    Patent number: 5899232
    Abstract: A poppet valve apparatus is structured to reduce the rate of build-up of fluid-borne debris within its internal architecture. The inlet and outlet ports are arranged tangential to the internal cylindrical walls defining the valve's flow chambers, whereby a circular flow pattern is produced within the valve interior, and a specially contoured flow director efficiently redirects the circular flow pattern through a circular annulus defined by a valve seat and a sealing ring.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: May 4, 1999
    Assignee: Coulter International Corp.
    Inventors: Louis Cardoso, Robert Autrey