Patents by Inventor Takuya Hatakeyama

Takuya Hatakeyama 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: 5202739
    Abstract: An image forming apparatus is provided with a device for forming an electrostatic image on an image bearing member. A developer develops a latent image formed on the image bearing member and includes a developing unit having a developer carrying member for carrying thereon and supplying a developer to the image bearing member. A moving member moves the developing unit between an operative position and a non-operative position away therefrom. A supporting member supports the developing unit for rotation about an axis, the supporting member rotatably supporting the developing unit at one side and supporting the developing unit at the other side for rotation and movement in a predetermined direction. An urging device urges the developing unit toward the image bearing member adjacent the other side, and a driver applies a driving force to the developer carrying member of the developing unit.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: April 13, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuya Hatakeyama, Michiro Koike
  • Patent number: 5172165
    Abstract: An image forming apparatus includes an image bearing member; a system for forming a latent image on the image bearing member; a developing device for developing the latent image formed on the image bearing member, the developing device including plural developing units, and each of the developing units including a developer carrying member movable to carry thereon the developer to supply the developer to the image bearing member and a developer scatter preventing member at a position adjacent the developer carrying member; a driver for moving a selected one of the developing units to a predetermined position faced to the image carrying member; a device for positioning the selected developing unit to an operating position for a developing operation; a member which is contacted to or close to the scatter preventing member when the selected developing unit is placed at the operating position.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: December 15, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuya Hatakeyama, Michiro Koike
  • Patent number: 4713024
    Abstract: A connector for distribution equipment, comprising a cylindrical outer conductor fixed to a casing, a substantially cylindrical insulator inserted in the outer conductor, an inner resilient conductive member inserted and so retained in the insulator, porjections provided radially inward on an opening formed on a portion through which an internal space of the casing and an internal space of the outer conductor communicate with each other, and flexible legs provided projectingly further rearward of a rear end surface of the insulator and having claws formed radially outward on the nose portion thereof. The insulator is inserted in the outer conductor with the flexible legs bent radially inward, and, as a result of the returning of the legs at instant when the claws of the leg come in across the projection of the opening, the insulator can be mounted and so fixed in the outer conductor through engagement of the claws and the projections.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: December 15, 1987
    Assignee: Uro Denshi Kogyo Kabushiki Kaisha
    Inventors: Takuya Hatakeyama, Shinji Ohga