Patents by Inventor Masami Yasujima

Masami Yasujima 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).

  • APPARATUS FOR PRODUCING A HOLLOW POPPET VALVE
    Publication number: 20140352385
    Abstract: A method of producing a hollow valve comprises the step for forming material having a blind hole along its axis, the step for extruding the material in a shaping hole in a die downward and the step for lowering a lower part of a pin to an upper part of a smaller-diameter portion of the shaping hole to allow the material to plastically flow downward through a gap between the lower part of a pin and the smaller-diameter portion of the shaping hole thereby molding a primary intermediate of the hollow valve having a stem and a head at the upper end of the stem through which a hole is formed.
    Type: Application
    Filed: August 20, 2014
    Publication date: December 4, 2014
    Inventors: Minoru Noguchi, Hiroyuki Tsuchiyama, Masami Yasujima
  • METHOD OF PRODUCING A HOLLOW POPPET VALVE AND AN APPARATUS THEREFOR
    Publication number: 20130047433
    Abstract: A method of producing a hollow valve comprises the step for forming material having a blind hole along its axis, the step for extruding the material in a shaping hole in a die downward and the step for lowering a lower part of a pin to an upper part of a smaller-diameter portion of the shaping hole to allow the material to plastically flow downward through a gap between the lower part of a pin and the smaller-diameter portion of the shaping hole thereby molding a primary intermediate of the hollow valve having a stem and a head at the upper end of the stem through which a hole is formed.
    Type: Application
    Filed: December 2, 2011
    Publication date: February 28, 2013
    Inventors: Minoru Noguchi, Hiroyuki Tsuchiyama, Masami Yasujima