Patents by Inventor Vincent Lebreton

Vincent Lebreton 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).

  • Method and device for controlling the trajectory of a shield-type tunnelling machine
    Patent number: 4904115
    Abstract: Method of controlling the trajectory of a shield-type tunnelling machine equipped with displacement control hydraulic rams (3), characterized in that, these rams being divided into at least three groups of rams (6A, 6B, 6C), the theoretical instantaneous flowrates of fluid to be applied to each of these groups are continuously determined (40) from the curvature characteristics and the overall rate of advance set point trajectory and these groups (7-26-27-28) are supplied with instantaneous flowrates, the values of which correspond to the theoretical values.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: February 27, 1990
    Assignee: Charbonnages de France
    Inventor: Vincent Lebreton