Patents by Inventor Ryuji Shintani

Ryuji Shintani 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).

  • PIEZOELECTRIC ACTUATOR MECHANISM
    Publication number: 20120314269
    Abstract: A piezoelectric actuator mechanism including: a screw-driven feeding mechanism that has a feed screw (11) and a feed screw nut (14); a disc-shaped rotor (17) mounted on the rear-end face of the feed screw nut (14); an ultrasonic motor (18) having a piezoelectric vibrator (19) that comes in contact with the circumference face of the rotor (17); and a driven mounting portion that is pressed against the leading end of the feed screw 11 by spring force, and displaced and positioned by the feeding operation of the feed screw. The driven mounting portion can be made to be a mirror holder (1) for use in an optical system, or a movable table (21) of a linear stage.
    Type: Application
    Filed: January 26, 2011
    Publication date: December 13, 2012
    Applicants: ISHIKAWA PREFECTURE, TOKYO INSTITUTE OF TECHNOLOGY, NIKKO COMPANY, SIGMA KOKI CO., LTD
    Inventors: Masahiro Takano, Kenichi Hirosaki, Ryuji Shintani, Yuta Yoshida, Toshiharu Minamikawa, Kouichi Nakano, Takuya Nagata, Shou Makino, Satoru Ichimura, Takashi Yoshida, Masayuki Ishida, Hiroshi Kawai, Mikio Takimoto, Kentaro Nakamura
  • Piezoelectric vibrator for ultrasonic motor
    Patent number: 7932661
    Abstract: In the invention, each piezoelectric element for a vibrator for an ultrasonic motor has electrode regions for exciting stretching vibration and flexural vibration separately. Thus, the invention provides a vibrator for an ultrasonic motor, in which electrodes are provided for applying voltage to each of the polarized region, and further provides a stack-type piezoelectric vibrator for an ultrasonic motor, consisting of a stack of the said vibrators and having an extraction electrode pattern provided for short circuit with an external electrode. The vibrator of the invention has high controllability, especially in a fine movement region and is useful as a driving source in a positioning device, in which enhanced vibration efficiency can be obtained.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: April 26, 2011
    Assignees: Nikko Company, Ishikawa Prefectural Government
    Inventors: Koji Ando, Mikio Takimoto, Masahiro Takano, Ryuji Shintani
  • VIBRATOR FOR ULTRASONIC MOTOR
    Publication number: 20100072858
    Abstract: In the invention, each piezoelectric element for a vibrator for an ultrasonic motor has electrode regions for exciting stretching vibration and flexural vibration separately. Thus, the invention provides a vibrator for an ultrasonic motor, in which electrodes are provided for applying voltage to each of the polarized region, and further provides a stack-type piezoelectric vibrator for an ultrasonic motor, consisting of a stack of the said vibrators and having an extraction electrode pattern provided for short circuit with an external electrode. The vibrator of the invention has high controllability, especially in a fine movement region and is useful as a driving source in a positioning device, in which enhanced vibration efficiency can be obtained.
    Type: Application
    Filed: September 23, 2008
    Publication date: March 25, 2010
    Applicants: NIKKO COMPANY, ISHIKAWA PREFECTURAL GOVERNMENT
    Inventors: Koji ANDO, Mikio TAKIMOTO, Masahiro TAKANO, Ryuji SHINTANI