Patents by Inventor Takayasu Yamada

Takayasu Yamada 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).

  • Lance for blow-refinement in converter
    Patent number: 4746103
    Abstract: A lance for blow-refinement in a converter comprises a primary nozzle generating a high-velocity, high-pressure primary oxygen jet, and an auxiliary nozzle generating an auxiliary oxygen jet. The auxiliary oxygen jet formed by the auxiliary nozzle has a velocity lower than the speed of sound. The auxiliary nozzle is configured so as to impede but not prevent oxygen flow therethrough. In the preferred construction, deceleration of gas-metal reaction induced by the oxygen jet.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: May 24, 1988
    Assignee: Kawasaki Steel Corporation
    Inventors: Nobuyoshi Takashiba, Shinji Kojima, Rinzo Tachibana, Takayasu Yamada, Fumiaki Yoshikawa