Patents by Inventor Jean-Guy HARREAU

Jean-Guy HARREAU 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: 9732840
    Abstract: A dual circuit lubrication device for lubricating a mechanical system, the lubrication device being provided with two independent lubrication circuits and a tank that is common to both lubrication circuits and that contains a lubrication liquid. A first lubrication circuit has two first suction points for sucking in the lubrication liquid and situated inside the tank, and a second lubrication circuit includes a second suction point for sucking in the lubrication liquid and situated inside the tank. The dual circuit lubrication device has means for detecting the lubrication liquid passing below a limit depth in the tank, which means are formed by a high first suction point situated at the level of the limit depth, the second suction point being situated below the limit depth, and a low first suction point being below the second suction point.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: August 15, 2017
    Assignee: AIRBUS HELICOPTERS
    Inventor: Jean-Guy Harreau
  • Publication number: 20160123457
    Abstract: A dual circuit lubrication device for lubricating a mechanical system, the lubrication device being provided with two independent lubrication circuits and a tank that is common to both lubrication circuits and that contains a lubrication liquid. A first lubrication circuit has two first suction points for sucking in the lubrication liquid and situated inside the tank, and a second lubrication circuit includes a second suction point for sucking in the lubrication liquid and situated inside the tank. The dual circuit lubrication device has means for detecting the lubrication liquid passing below a limit depth in the tank, which means are formed by a high first suction point situated at the level of the limit depth, the second suction point being situated below the limit depth, and a low first suction point being below the second suction point.
    Type: Application
    Filed: October 28, 2015
    Publication date: May 5, 2016
    Inventor: Jean-Guy HARREAU