Patents by Inventor Roger Perrot

Roger Perrot 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).

  • Machine for making grooves in the ground
    Patent number: 5934834
    Abstract: According to the invention:said machine comprises:a base plate (8) through which a segment of a disk (4) can pass, said base plate preventing matter from the grooves from being thrown outward;means firmly pressing said base plate and said disk against the ground; andthe disk (4) is mounted so that it can rotate freely, so as to make in the ground, without removing matter, a recess that corresponds to said groove.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: August 10, 1999
    Assignee: S.D.T.O.
    Inventor: Roger Perrot
  • Stirring apparatus for treating waste liquids
    Patent number: 4087496
    Abstract: The apparatus includes a central cylindrical element 1, extended, at its upper part, by a hopper 2, in the shape of a truncated cone ending in a roughly ovoid carter of a substantially spiral cross-section 3, extended by an air inlet 6, while the lower part of the tube forming the main body of the apparatus has the shape of a truncated cone 7 ending to a horizontal crown 8, located above a reaction plate 9, a rotating element 10-20 being located in the lower part of the main element, forming the body of the apparatus.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: May 2, 1978
    Assignee: Nouveaux Etablissements Sueur
    Inventor: Roger Perrot