Patents by Inventor Jean P. Vallaude

Jean P. Vallaude 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).

  • Internal combustion engine piston
    Patent number: 4372194
    Abstract: Internal combustion engine piston of the composite type, having a steel upper portion surmounting an aluminum lower portion in which the piston ring grooves are provided.The lower portion (2) comprises a concentric circular cavity (3), open at the top and recessed from the ring grooves (5), said cavity being covered by an annular groove (7) in the lower surface of the steel upper portion (1) to form a dead space.
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: February 8, 1983
    Assignee: Regie Nationale Des Usines Renault
    Inventor: Jean P. Vallaude