Patents by Inventor Jean G. A. Dupin

Jean G. A. Dupin 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).

  • In-line two-cylinder engine
    Patent number: 4174698
    Abstract: An in-line, two-cylinder engine comprises a crankshaft having crankpins at a 360.degree. setting and balancing means comprising a first counterweight rotating oppositely to, but at the same speed as, the crankshaft, such counterweight being so set that its center of gravity is remote from the crankpins when the pistons are at top dead center, such first counterweight being of a size and design such as to develop a centrifugal force whose amplitude is half the maximum amplitude of the reciprocating rectilinear inertia forces of the engine.
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: November 20, 1979
    Assignee: Societe Anonyme Automobiles Citroen
    Inventor: Jean G. A. Dupin