Patents by Inventor Marvin H. Humbert

Marvin H. Humbert 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).

  • Endless belt valve grinder
    Patent number: 4987701
    Abstract: An endless belt valve grinder for refacing valve heads used in internal combustion engines. Grinding is done by rotating the valve face against a moving endless abrasive belt supported on a backing wheel and driven by a driving wheel. The workhead or chuck assembly for holding the valve during grinding is automatically pneumatically actuated for gripping and releasing the valve stem. Air pressure is selected and regulated and a stop is provided to adjust the gripping force on the valve stem.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: January 29, 1991
    Assignee: K. O. Lee Company
    Inventor: Marvin H. Humbert