Patents by Inventor Jean-Martial Leger

Jean-Martial Leger 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).

  • Gas quenching installation and the corresponding quenching method
    Publication number: 20060037678
    Abstract: The invention relates to a gas quenching installation comprising a quenching cell (12), a buffer tank (10) which is intended to contain the quenching gas (6), gas connection means (32) which link the buffer tank (10) with the quenching cell (12) and gas supply means. Said gas supply means consist of an evaporator (8), the outlet (20) of which is connected to an inlet (22) in the buffer tank (10), and a high pressure storage tank (4) for the liquid-state quenching gas (6) which is connected to an inlet (16) in the evaporator (8), the connection means between the evaporator and the buffer tank having no gas compression means. The invention applies to installations used for the nitrogen quenching of steel parts.
    Type: Application
    Filed: February 10, 2003
    Publication date: February 23, 2006
    Inventor: Jean-Martial Leger
  • Plasma producing gas for plasma projection of metallic oxide
    Patent number: 5271869
    Abstract: The plasma producing gas consists of a ternary mixture of helium, argon and hydrogen and contains at least about 10% hydrogen, typically 30 to 70% helium, 10 to 50% argon and 10 to 25% hydrogen, preferably 20% (.+-.5%) hydrogen. Use for the plasma projection of metallic oxide.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: December 21, 1993
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Nicoud, Jean-Martial Leger, Pierre Fauchais, Alain Grimaud