Patents by Inventor Pierre M. Vidal

Pierre M. Vidal 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).

  • Process and device for pipe bending
    Patent number: 5127248
    Abstract: A pipe bending die, in the shape of a cylinder, has a groove gouged out of its lateral surface and a cross section which is a semi-circle of a diameter equal to the diameter of the pipe to be bent. The base of the cylinder is bounded on one hand by a portion of logarithmic spiral defined in polar coordinates by the equation P=Poe-k.theta., bounded by the points .theta.=0 and .theta.=2.pi., and wherein Po and k are positive constants and, on the other hand, by a segment of straight line joining the points of the spiral for which .theta.=0 and .theta.=2.pi..
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: July 7, 1992
    Assignee: Etat Francais represente par le Delegue General
    Inventors: Paul R. Sanseau, Pierre M. Vidal