Patents by Inventor Hiromasa Yamasaki

Hiromasa Yamasaki 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).

  • Electromagnetic valve and brake control device
    Patent number: 11878673
    Abstract: A cutoff valve comprises a coil wound around an outer periphery of a bobbin, a cylinder in contact with a protruding portion formed in an inner side of the bobbin, and an armature disposed inside the cylinder and moved in a winding axis direction of the coil by energization of the coil.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: January 23, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Hiromasa Yamasaki, Masaki Misuno, Chiharu Nakazawa
  • Electromagnetic Valve and Brake Control Device
    Publication number: 20210206360
    Abstract: A cutoff valve comprises a coil wound around an outer periphery of a bobbin, a cylinder in contact with a protruding portion formed in an inner side of the bobbin, and an armature disposed inside the cylinder and moved in a winding axis direction of the coil by energization of the coil.
    Type: Application
    Filed: May 21, 2019
    Publication date: July 8, 2021
    Inventors: Hiromasa YAMASAKI, Masaki MISUNO, Chiharu NAKAZAWA
  • Vertical injection molding machine
    Patent number: 7179075
    Abstract: A vertical injection molding machine designed to move up/down a large weight by a toggle link mechanism so as to perform mold opening/closing. In a foreign matter detection region where a mold opening/closing servo-motor is subjected to speed feedback control during a mold closing process, a measured torque value of the mold opening/closing servo-motor is compared with a standard torque characteristic curve with no foreign matter between dies. Between a start position of the foreign matter detection region and a position of the foreign matter detection region in which a torque value is zero in the standard torque characteristic curve, it is concluded that there is a foreign matter between the dies when the measured torque is lower than the standard torque characteristic curve by a predetermined value or more.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: February 20, 2007
    Assignee: Toyo Machinery & Metal Co., Ltd.
    Inventor: Hiromasa Yamasaki
  • Vertical injection molding machine
    Publication number: 20060159800
    Abstract: A vertical injection molding machine designed to move up/down a large weight by a toggle link mechanism so as to perform mold opening/closing. In a foreign matter detection region where a mold opening/closing servo-motor is subjected to speed feedback control during a mold closing process, a measured torque value of the mold opening/closing servo-motor is compared with a standard torque characteristic curve with no foreign matter between dies. Between a start position of the foreign matter detection region and a position of the foreign matter detection region in which a torque value is zero in the standard torque characteristic curve, it is concluded that there is a foreign matter between the dies when the measured torque is lower than the standard torque characteristic curve by a predetermined value or more.
    Type: Application
    Filed: April 15, 2005
    Publication date: July 20, 2006
    Applicant: TOYO MACHINERY & METAL CO., LTD.
    Inventor: Hiromasa Yamasaki