Patents by Inventor Kohji Aizawa

Kohji Aizawa 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).

  • Radial bearing and transmission using the same
    Patent number: 6676296
    Abstract: The present invention relates to a bearing used in a transmission. The radial bearing for supporting a rotating shaft of the transmission has a substantial elliptical-cylinder-shaped inner circumferential surface. At least two lubricating resin members are provided on the inner circumferential surface so that the members are extending in the axial direction and symmetric with respect to the central axis of the bearing. The rigidity of the bearing is increased as increasing the rotation speed of the shaft.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: January 13, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Tomoaki Inoue, Kohji Aizawa, Masaaki Nakano, Masanori Katayama
  • Radial bearing and transmission using the same
    Publication number: 20020131657
    Abstract: The present invention relates to a bearing used in a transmission. The radial bearing for supporting a rotating shaft of the transmission has a substantial elliptical-cylinder-shaped inner circumferential surface. At least two lubricating resin members are provided on the inner circumferential surface so that the members are extending in the axial direction and symmetric with respect to the central axis of the bearing. The rigidity of the bearing is increased as increasing the rotation speed of the shaft.
    Type: Application
    Filed: August 28, 2001
    Publication date: September 19, 2002
    Inventors: Tomoaki Inoue, Kohji Aizawa, Masaaki Nakano, Masanori Katayama
  • Method of operating pump and bearing device for pump
    Patent number: 5639165
    Abstract: In a ceramic bearing device having a ceramic bearing slidably supporting a sleeve fixed to a pump main shaft, a bearing case mounting the ceramic bearing and a bearing casing elastically supporting the bearing case with rubber, a cylindrical container is fixed to the bearing casing so as to surround the lower surface and the outer peripheral side of the bearing casing, a water storage tank having a return plate in the top end portion being fixed to the pump main shaft so as to surround the cylindrical container, a passage being provided in the cylindrical container, distance pieces being provided between the outer peripheral portion of the bearing casing and the inner peripheral portion of the cylindrical container being provided, a passage being formed in the distance piece.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: June 17, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Kohji Aizawa, Akira Yamaguchi, Shigenobu Nagasawa, Shiro Matsui, Kunio Takada, Yoshiaki Chiba