Patents by Inventor Bernard Dewanckel

Bernard Dewanckel 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).

  • Refrigerator, more particularly with Vuilleumier cycle, comprising pistons suspended by gas bearings
    Patent number: 4840032
    Abstract: It comprises a first cylinder (102), a displacement piston (104) sliding in the first cylinder (102), a conduit in which a thermal regenerator is included, a second cylinder (202), a second displacement piston (204) sliding in the second cylinder (202), means for displacing the first cylinder and the second cylinder in phase relation. A gas bearing (104a) is provided at the hot end of the first piston (104) and a gas bearing (104b) is provided at the intermediate temperature end of the first piston. A gas bearing (204b) is also provided at the intermediate temperature end of the second piston (204) and a gas bearing (204a) is provided at the cold end of the second piston (204).
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: June 20, 1989
    Assignees: Commissariat a l'Energie Atomique, Air Liquid
    Inventors: Gerard Claudet, Bernard Dewanckel, Alain Ravex, Serge Reale