Patents by Inventor Denis Gouardo

Denis Gouardo 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).

  • Patent number: 5697251
    Abstract: A control system for a synchromesh unit, particularly suitable for controlling a synchromesh in a forward/reverse pre-select gear change system. The system is purely hydraulic, incorporating a double acting hydraulic cylinder (1) for moving the synchromesh. The hydraulic circuit controlling the hydraulic cylinder (1) includes restrictions (R.sub.1), (R.sub.2A), (R.sub.2B) and an accumulator (10), which vary the force applied by the hydraulic cylinder (1). The variation of the force applied by the hydraulic cylinder (1) includes a gradual, progressive increase of force whilst the synchromesh is matching its speed to the gear to be engaged, and subsequently allowing the synchromesh mechanism to move rapidly once its speed is matched with the gear to be engaged, to quickly move the teeth of the synchromesh and the gear to be engaged together. The force applied by the hydraulic cylinder is then increased again to a maximum once the synchromesh is fully engaged.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: December 16, 1997
    Assignees: Massey Ferguson SA, Renault Agriculture SA
    Inventors: Patrick Lorriette, Gilles Hoessler, Denis Gouardo