Patents by Inventor Thomas Thiemeier

Thomas Thiemeier 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).

  • Ceramic valve for internal combustion engines having a reduced tendency to stress fracture
    Patent number: 5497740
    Abstract: The invention concerns a ceramic valve for internal combustion engines whose spring retainer is frictionally linked to the valve stem, and whose cylindrical valve stem (2) is surrounded by a collet (3) having a conical outer profile (4). The spring retainer (5) provided with a conical bore (6) rests on the collet (3).
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: March 12, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Thomas Thiemeier