Patents by Inventor Hirokazu Nasu

Hirokazu Nasu 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).

  • Relief valve
    Patent number: 9435448
    Abstract: A relief valve configured such that a plunger configured to be pushed forward by an elastic member to block communication between an inflow opening and an outflow opening moves rearward by an increase in pressure of the inflow opening against an elastic force of the elastic member to cause the inflow opening and the outflow opening to communicate with each other; and a piston configured to push a rear end of the elastic member forward moves forward by the increase in the pressure of the inflow opening to compress the elastic member, the elastic member includes a first elastic member and a second elastic member arranged in series, and the second elastic member has a smaller elastic constant than the first elastic member.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: September 6, 2016
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Masahiro Matsuo, Hirokazu Nasu
  • RELIEF VALVE
    Publication number: 20140069529
    Abstract: A relief valve configured such that a plunger configured to be pushed forward by an elastic member to block communication between an inflow opening and an outflow opening moves rearward by an increase in pressure of the inflow opening against an elastic force of the elastic member to cause the inflow opening and the outflow opening to communicate with each other; and a piston configured to push a rear end of the elastic member forward moves forward by the increase in the pressure of the inflow opening to compress the elastic member, the elastic member includes a first elastic member and a second elastic member arranged in series, and the second elastic member has a smaller elastic constant than the first elastic member.
    Type: Application
    Filed: May 31, 2012
    Publication date: March 13, 2014
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Masahiro Matsuo, Hirokazu Nasu