Patents by Inventor Yoshiaki Koshida

Yoshiaki Koshida 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).

  • STEPPING MOTOR
    Publication number: 20090200877
    Abstract: A stepping motor is provided with a rotor having with a rotor shaft A permanent magnet is attached to an outer peripheral side of the rotor shaft and a stator having pole teeth faces the permanent magnet in a radial direction. The stepping motor is characterized in that the rotor shaft is formed of aluminum or aluminum alloy.
    Type: Application
    Filed: June 22, 2005
    Publication date: August 13, 2009
    Inventors: Yoshiaki Koshida, Toshio Yamamoto, Takeyoshi Miyashita
  • Rotation shaft, feeding device, motor and manufacturing method for rotation shaft
    Publication number: 20060110270
    Abstract: A rotation shaft includes a spiral groove for feeding which is formed on the outer peripheral face of the rotation shaft and a plurality of fine recessed parts which is formed on a flank surface of the spiral groove. The rotation shaft may be manufactured by a spiral groove forming step which forms a spiral groove on an outer peripheral face of the rotation shaft and a roughening step which forms a plurality of fine recessed parts on the flank surface of the spiral groove by using a first abrasive medium whose size is set to be capable of reaching to the flank surface. The rotation shaft may be preferably applied to a feeding device and a motor.
    Type: Application
    Filed: November 17, 2005
    Publication date: May 25, 2006
    Inventors: Yasuhira Inada, Yoshiaki Koshida, Toshio Yamamoto
  • Lubricated thread screw drive and method of manufacturing same
    Patent number: 6781797
    Abstract: A motor is disclosed comprising a motor case and a rotating shaft for the motor having a portion within the motor case and a portion extending outside of the motor case. A feed screw is formed on the extending portion of the rotating shaft. The feed screw threadedly engages with a moving body which moves back and forth along an axial direction of the rotating shaft. The feed screw has a threaded portion, a top portion of this threaded portion being provided with a concavity to store lubricating oil.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: August 24, 2004
    Assignee: Sankyo Seiki Mfg. Co., Ltd.
    Inventors: Hitoshi Mutai, Yoshiaki Koshida
  • Screw shaft and method of manufacturing the same
    Publication number: 20030095850
    Abstract: A screw shaft including a shaft base member having a hollow part at a shaft cantor part and an outer periphery part formed with a screw part. The hollow part is formed protruded to an inner side corresponding to recessed portions of the screw part.
    Type: Application
    Filed: November 18, 2002
    Publication date: May 22, 2003
    Applicant: Sankyo Seiki Manufacturing Company, Ltd.
    Inventors: Kiyoshi Nishimura, Yoshiaki Koshida, Toshimi Suzuki
  • Motor and method of manufacturing the same
    Publication number: 20030011927
    Abstract: A motor is disclosed comprising a motor case and a rotating shaft for the motor having a portion within the motor case and a portion extending outside of the motor case. A feed screw is formed on the extending portion of the rotating shaft. The feed screw threadedly engages with a moving body which moves back and forth along an axial direction of the rotating shaft. The feed screw has a threaded portion, a top portion of this threaded portion being provided with a concavity to store lubricating oil.
    Type: Application
    Filed: April 12, 2002
    Publication date: January 16, 2003
    Inventors: Hitoshi Mutai, Yoshiaki Koshida