Patents by Inventor Benoit A. du Chaffaut

Benoit A. du Chaffaut 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 remotely operating and assembly comprising a bean/needle system, and use thereof in a drill string
    Patent number: 5392867
    Abstract: A device for remotely operating equipment through a variation in the flow of a fluid includes a coupling unit connecting the device and the equipment to be operated, an assembly of two elements cooperating with one another to control an opening value of a channel through which the fluid flows and a control assembly for adjusting the opening value in order to have it take on one or the other of two particular values.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: February 28, 1995
    Assignee: Institut Francias du Petrole
    Inventors: Benoit A. du Chaffaut, Jean Boulet