Patents by Inventor Charles De Champeaux

Charles De Champeaux 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).

  • Rotary seal
    Patent number: 8387910
    Abstract: A rotary seal having first and second parts mobile relative to each other about a rotation axis. The first and second mobile parts each include an interface area having a plurality of protruding and recessed members with complementary shapes, the protruding and recessed members of one part engaging the protruding and recessed members of the other part in order to define decompression chambers with an increasing volume. The interface areas are located at a distance from each other without any friction between them.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: March 5, 2013
    Inventors: Charles De Champeaux, Philippe De Champeaux
  • ROTARY SEAL
    Publication number: 20100090414
    Abstract: The invention relates to a rotary seal that comprises first (7, 8) and second (7, 8) parts mobile relative to each other about a rotation axis (A). The first and second mobile parts (7, 8) each include an interface area (30) having a plurality of protruding and recessed members with complementary shapes, the protruding and recessed members of one part (7, 8) engaging the protruding and recessed members of the other part (7, 8) in order to define decompression chambers with an increasing volume, the interface areas being located at a distance from each other without any friction between them.
    Type: Application
    Filed: March 6, 2008
    Publication date: April 15, 2010
    Inventors: Charles De Champeaux, Philippe De Champeaux