Patents by Inventor Shinji NARITA

Shinji NARITA 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).

  • Patent number: 11408531
    Abstract: A spool valve capable of suppressing deterioration of position controllability of a spool due to misalignment includes: a housing including a spool hole; a spool inserted into the spool hole of the housing so as to be movable in an axial direction; and an electric actuator configured to move the spool in the axial direction. The electric actuator includes: an electric motor configured to rotate an output shaft; a linear-motion converting mechanism including a linear-motion member configured to be linearly movable, the linear-motion converting mechanism being configured to convert a rotational motion of the output shaft into a linear motion of the linear-motion member; and a coupling member coupling the linear-motion member and the spool moves in accordance with the linear motion of the linear-motion member. The coupling member allows one of tilt and eccentricity of an axis of the spool relative to an axis of the linear-motion member.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: August 9, 2022
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Shinji Narita, Hideki Tanaka, Kazuto Fujiyama, Kazuya Matsumoto
  • Patent number: 11199275
    Abstract: A spool valve includes: a housing including a spool hole; a spool inserted into the spool hole of the housing so as to be movable in an axial direction; a screw shaft arranged coaxially with the spool; an electric motor configured to rotate the screw shaft; a nut threadedly engaged with the screw shaft and configured to move in the axial direction when the screw shaft is rotated; a coupler through which the nut and the spool are coupled to each other; and a coil spring configured to apply biasing force to the spool, the biasing force acting so as to maintain the spool at a neutral position, the coil spring being arranged so as to overlap the nut when viewed from a radial direction of the screw shaft.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: December 14, 2021
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Shinji Narita, Hideki Tanaka, Tadashi Anada
  • Publication number: 20210207731
    Abstract: A spool valve capable of suppressing deterioration of position controllability of a spool due to misalignment includes: a housing including a spool hole; a spool inserted into the spool hole of the housing so as to be movable in an axial direction; and an electric actuator configured to move the spool in the axial direction. The electric actuator includes: an electric motor configured to rotate an output shaft; a linear-motion converting mechanism including a linear-motion member configured to be linearly movable, the linear-motion converting mechanism being configured to convert a rotational motion of the output shaft into a linear motion of the linear-motion member; and a coupling member coupling the linear-motion member and the spool moves in accordance with the linear motion of the linear-motion member. The coupling member allows one of tilt and eccentricity of an axis of the spool relative to an axis of the linear-motion member.
    Type: Application
    Filed: May 17, 2018
    Publication date: July 8, 2021
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Shinji NARITA, Hideki TANAKA, Kazuto FUJIYAMA, Kazuya MATSUMOTO
  • Publication number: 20200347953
    Abstract: A spool valve includes: a housing including a spool hole; a spool inserted into the spool hole of the housing so as to be movable in an axial direction; a screw shaft arranged coaxially with the spool; an electric motor configured to rotate the screw shaft; a nut threadedly engaged with the screw shaft and configured to move in the axial direction when the screw shaft is rotated; a coupler through which the nut and the spool are coupled to each other; and a coil spring configured to apply biasing force to the spool, the biasing force acting so as to maintain the spool at a neutral position, the coil spring being arranged so as to overlap the nut when viewed from a radial direction of the screw shaft.
    Type: Application
    Filed: December 28, 2018
    Publication date: November 5, 2020
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Shinji NARITA, Hideki TANAKA, Tadashi ANADA