Patents by Inventor Maurice Prevot

Maurice Prevot 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 of making one-piece tubular axle blanks and the produced axle blanks
    Patent number: 4380480
    Abstract: A method for the economical manufacture of one-piece tubular axle blanks of the type having a center portion with journals at both ends. The method involves quenching a length of a preheated steel tube followed by tempering and then swaging at both ends by forging or hammering. The areas of transition between the center portion and the respective journals are thickened by upsetting, and the ends of the axle blank are subsequently locally heat treated by annealing.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: April 19, 1983
    Assignee: Vallourec
    Inventors: Jean-Jacques Delfino, Maurice Prevot
  • Device for changing mandrels in tube rolling mills
    Patent number: 3955392
    Abstract: Tube rolling mill of the STIEFEL type comprises a feed trough and a member etween the trough and mill rolls over which the tube and plug pass. This member is movable between a first position in which it supports the tube and plug in alignment with the feed trough and a second in which it directs the plug into a discharge chute.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: May 11, 1976
    Assignee: Vallourec Usines a Tubes de Lorraine-Escaut et Vallourec Reunies
    Inventor: Maurice Prevot