Patents by Inventor Hiroshi YAMAGAI

Hiroshi YAMAGAI 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).

  • Publication number: 20230343499
    Abstract: A solenoid includes a coil bobbin, a coil, a terminal, a housing, an armature, an actuation pin, and the like. The coil bobbin includes a tubular portion, and a first flange portion formed on one end of the tubular portion and extending radially to outside the tubular portion. The coil is wound around the coil bobbin. The terminal connects a terminal conductor portion of the coil and a cable. The terminal includes a joint portion that joins the terminal conductor portion of the coil. The joint portion extends in a direction along one end surface of the first flange portion.
    Type: Application
    Filed: September 17, 2021
    Publication date: October 26, 2023
    Inventors: Tomohiko IIDA, Shunsuke MORI, Hiroshi YAMAGAI
  • Publication number: 20180051766
    Abstract: Provided is a cylinder device whereby it is possible to easily change and distinguish (identify) damping force characteristics. This cylinder device is equipped with: an inner cylinder in which a function fluid, which is changed in fluid properties by an electrical field or a magnetic field, is sealed, and into which a rod is inserted; a cylindrical member which is provided outside of the inner cylinder, and serves as an electrode or a magnetic pole; and a flow path forming member which is provided between the inner cylinder and the cylindrical member, and forms one or more flow paths through which the functional fluid flows from one end to the other end in the axial direction of the cylinder device in response to the forward and backward movement of the rod. The flow paths are spiral or meander flow paths having circumferentially-extending portions. The flow path forming member is formed with notches which cause axially adjacent portions among the flow paths to communicate with each other.
    Type: Application
    Filed: September 26, 2016
    Publication date: February 22, 2018
    Inventor: Hiroshi YAMAGAI
  • Patent number: 8985008
    Abstract: A piston connected with a piston rod is fitted in an outer tube having a hydraulic fluid sealed therein, with the piston rod projecting out of the outer tube. A seal part for the piston rod includes a rod guide, a seal case, an oil seal, a dust seal and a securing member, which are inserted into an end portion of the outer tube and secured by first and second staked portions. The sliding part of the piston rod is sealed with the rod seal and a seal lip of the oil seal. The area between the seal case and the outer tube is sealed with an O-ring and a seal member. The pressure resistance of the seal part can be increased to a considerable extent by two-point staking by the first and second staked portions and two-stage sealing by the rod seal and the oil seal.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: March 24, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kazunori Minoguchi, Tetsuo Yoshida, Hiroshi Yamagai
  • Publication number: 20100192766
    Abstract: A piston connected with a piston rod is fitted in an outer tube having a hydraulic fluid sealed therein, with the piston rod projecting out of the outer tube. A seal part for the piston rod includes a rod guide, a seal case, an oil seal, a dust seal and a securing member, which are inserted into an end portion of the outer tube and secured by first and second staked portions. The sliding part of the piston rod is sealed with the rod seal and a seal lip of the oil seal. The area between the seal case and the outer tube is sealed with an O-ring and a seal member. The pressure resistance of the seal part can be increased to a considerable extent by two-point staking by the first and second staked portions and two-stage sealing by the rod seal and the oil seal.
    Type: Application
    Filed: January 27, 2010
    Publication date: August 5, 2010
    Inventors: Kazunori MINOGUCHI, Tetsuo YOSHIDA, Hiroshi YAMAGAI