Patents by Inventor Dongshan SUN

Dongshan SUN 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).

  • Speed reducer and actuator
    Patent number: 10167929
    Abstract: A speed reducer includes a sun gear, planetary gears, a fixed part, an output part, a first bearing, and a second bearing. The sun gear rotates relative to the fixed part at a first rotation speed. The planetary gears are disposed around the sun gear to engage with the sun gear. The output part includes an annular internal gear engaging with the planetary gears. The output part rotates relative to the fixed part at a second rotation speed lower than the first rotation speed. The first bearing is interposed between the fixed part and the output part at a position closer to an input side with respect to the planetary gears. The second bearing is interposed between the fixed part and the output part at a position closer to an output side with respect to the planetary gears. The second bearing is smaller in radial size than the first bearing.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 1, 2019
    Assignees: NIDEC-SHIMPO (ZHE JIANG) CORPORATION, NIDEC-SHIMPO CORPORATION
    Inventors: Kanta Okumura, Dongshan Sun
  • SPEED REDUCER AND ACTUATOR
    Publication number: 20170370445
    Abstract: A speed reducer includes a sun gear, planetary gears, a fixed part, an output part, a first bearing, and a second bearing. The sun gear rotates relative to the fixed part at a first rotation speed. The planetary gears are disposed around the sun gear to engage with the sun gear. The output part includes an annular internal gear engaging with the planetary gears. The output part rotates relative to the fixed part at a second rotation speed lower than the first rotation speed. The first bearing is interposed between the fixed part and the output part at a position closer to an input side with respect to the planetary gears. The second bearing is interposed between the fixed part and the output part at a position closer to an output side with respect to the planetary gears. The second bearing is smaller in radial size than the first bearing.
    Type: Application
    Filed: June 19, 2017
    Publication date: December 28, 2017
    Inventors: Kanta OKUMURA, Dongshan SUN