Patents by Inventor Patrick Fonteneau

Patrick Fonteneau 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).

  • Steelworks cutting nozzle with a double heating ring
    Patent number: 4821963
    Abstract: The nozzle comprises an oxidizing outer heating ring and a carburizing inner heating ring surrounding the cutting jet. This nozzle is made in two parts respectively forming a unit (1) opf injectors and a cutting unit (2) in adjoining relation to each other in a transverse joint plane and in which are provided various passageways (4, 5). Grooves (7) are provided for putting the outer passageways (5) in communication with the inner passageways (4) so as to supply to the inner passageways (4) the required small quantity of oxygen for the inner heating ring from the oxy-fuel mixture supplied to the outer passageways (5).
    Type: Grant
    Filed: July 30, 1987
    Date of Patent: April 18, 1989
    Assignee: L'Air Liquide
    Inventors: Michel Arnout, Patrick Fonteneau, Didier Lasnier