Patents by Inventor Jacques Vigreux

Jacques Vigreux 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).

  • Safety device for a compressed gas tank
    Patent number: 4022236
    Abstract: Safety device for a compressed gas tank comprising a membrane influenced by an elastic effort and resting simultaneously on two concentric seats. It is characterized in that the applying of the pressure to the seat having the smallest diameter corresponds to a sealing position and that the applying of the pressure to the seat having the greatest diameter causes a sudden opening of the device.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: May 10, 1977
    Assignee: Delle-Alsthom
    Inventors: Pierre Dumont, Jacques Vigreux
  • Device for observing an equipment under tension
    Patent number: 3966297
    Abstract: Device for observing electrical equipment under voltage application, characterized in that it comprises an adjustable periscopic glass which include a lens assembly which conforms to and interfits with the observation ports within the equipment and carries within the lens assembly adjacent the periphery a light source for illumination of the equipment enclosure interior.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: June 29, 1976
    Assignee: Delle-Alsthom
    Inventors: Jacques Vigreux, Andre Gromier