Patents by Inventor Jean C. Carre

Jean C. Carre 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).

  • Device for electrohydraulically lifting agricultural implements
    Patent number: 4301870
    Abstract: A device for hydraulically lifting agricultural implements by a lifting jack, utilizing a pump with constant stroke volume and a stepless distributor. A flow pressure regulator of the pump is piloted by the pressure of the lifting jack, a downstroke valve is provided for lowering the implements, and a relay valve connects to the reservoir the piloting pressure of the regulator in the downward movement of the implements. A reducing valve fed by the flow circuit of the pump feeds at least one pilot electrovalve of the stepless distributor.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: November 24, 1981
    Assignee: Regie Nationale des Usines Renault
    Inventors: Jean C. Carre, Roger Maistrelli