Patents by Inventor Ernst Berchtold

Ernst Berchtold 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 piston engine
    Patent number: 4200066
    Abstract: The cage for the valve seat is provided with cooling ducts which are uniformly spaced about the cage. Alternating ducts are used as coolant supply ducts while the remaining ducts are used as exhaust ducts. The ducts are arranged to uniformly cool the cage and valve seat. Suitable cross ducts are used to achieve a uniform distribution of the coolants supplied to the cage as well as a uniform removal of a coolant.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: April 29, 1980
    Assignee: Sulzer Brothers Limited
    Inventor: Ernst Berchtold