Patents by Inventor Michel F. Rigal

Michel F. Rigal 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).

  • Split ring retention of splined or toothed parts
    Patent number: 4261668
    Abstract: The two parts of a splined coupling are held together axially by a resilient split locking ring. The locking ring is seated in grooves of the two parts, which are formed in the splines of the parts. The ring is formed from a stainless steel having a nitrided hardened surface layer to resist galling or damage to the ring as a result of the spline notched sides of the grooves.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: April 14, 1981
    Assignees: Societe Anonyme Automobiles Citroen, Automobiles Peugeot
    Inventor: Michel F. Rigal