Patents by Inventor Fran.cedilla.ois Drain

Fran.cedilla.ois Drain 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).

  • Installation and method for determining the level and density of a liquid in a tank, using a single immersed bubble probe
    Patent number: 5953954
    Abstract: An installation and method for determining the level and density of a liquid in a tank. A reference probe leads into the tank, above the liquid. A single bubble probe is connected by a valve to the reference probe. The bubble probe extends into the tank and has a widened section disposed in the liquid. Compressed air is injected into the reference probe and the bubble probe. In an initial state, the valve is opened and there is no pressure difference between the reference probe and the bubble probe. The valve is then closed and the pressure difference between the reference probe and the bubble probe is measured. The level and density of the liquid is determined from measured values of the pressure difference.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: September 21, 1999
    Assignee: Compagnie Generale des Matieres Nucleaires
    Inventors: Fran.cedilla.ois Drain, Jacques Gagniere