Patents by Inventor Kurt Boppart

Kurt Boppart 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).

  • Process for applying a heat-barrier layer to a piston crown
    Patent number: 4312106
    Abstract: The piston of a piston-type machine has on its surface a heat-barrier layer of plastic material which is cast into a recess formed in the piston crown. A pouring means formlockingly enclosing the upper edge is put on the piston, held in a vertical position, to permit the recess to be overfilled with the material. The pouring means is removed after the material has hardened. Due to the shrinkage of material when the material hardens, the material and the upper edge form a flat surface on the piston.
    Type: Grant
    Filed: January 25, 1980
    Date of Patent: January 26, 1982
    Assignee: Fritz Haug AG
    Inventors: Hans Wanner, Kurt Boppart