Patents by Inventor Jacques A. Bronchart

Jacques A. Bronchart 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).

  • Spark plug for internal combustion engine
    Patent number: 4970426
    Abstract: The spark plug according to the invention comprises a shell (1), a central electrode (3) surrounded by an insulator (2) and a ground electrode (4) which, according to the invention, has a cross section (4a) such that the surface of the ground electrode (4) which is located nearest to the bottom end of the central electrode (3) is larger than the surface of the ground electrode (4) which is located farthest away from said bottom end of the central electrode (3). The ground electrode (4) may be provided with a copper core and its surface nearest to the bottom end of the central electrode (3) may be provided with a precious metal insert. The surface of the ground electrode which is farthest away from the bottom end of the central electrode (3) may be reduced to a line and the lateral surfaces of the ground electrode may be curved surfaces.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: November 13, 1990
    Assignee: Champion Spark Plug Europe S.A.
    Inventor: Jacques A. Bronchart