Patents by Inventor Jean S. R. Rouam

Jean S. R. Rouam 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).

  • Method for magnetically determining the degree of wear of a piston ring of an internal combustion engine while reciprocating thereon
    Patent number: 4143319
    Abstract: A method for determining the degree of the wear condition of a piston ring in sliding contact with a cylinder wall of an internal combustion engine. The piston ring has a defined magnetic property which property in sliding contact with the wall may be varied by a chromium plating. The reluctance of a magnetic field of an inductive sensor located in the cylinder wall is varied as the piston ring reciprocates and wears. The reluctance variation is compared with a predetermined reference level of the magnetic property for an acceptable degree of wear for the ring.
    Type: Grant
    Filed: June 10, 1976
    Date of Patent: March 6, 1979
    Assignee: Societe d'Etudes de Machines Thermiques S.E.M.T.
    Inventor: Jean S. R. Rouam