Patents Assigned to Kabushiki Kaisha Hitachi Seiksakusho
  • Master cylinder and method of producing the same
    Patent number: 7003952
    Abstract: A master cylinder has a cylinder member in the shape of a cylinder, one end of which is closed, and a piston inserted in the cylinder member to form a pressure chamber in the cylinder member. The cylinder member is formed with a port for providing communication between the pressure chamber and a reservoir. The port is formed during casting of the cylinder member, thereby eliminating the need to form the port by boring, and forming the port into an elongated-hole shaped sectional configuration.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: February 28, 2006
    Assignee: Kabushiki Kaisha Hitachi Seiksakusho
    Inventors: Tomonori Mouri, Takato Ogiwara, Yasuhiko Amari, Naganori Koshimizu