Patents by Inventor Yasumasa KANSAKU

Yasumasa KANSAKU 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).

  • Diaphragm device for projector
    Patent number: 8520284
    Abstract: A diaphragm device for projector includes a first gear unit, a second gear unit and two diaphragm plates. The first gear unit includes a partial circular arc portion and a gear portion with partial no tooth. The second gear unit includes a circular arc portion corresponding to the partial circular arc portion, and a pinion and a gear corresponding to the gear portion with partial no tooth. When the partial circular arc portion abuts on the circular arc portion, the gear does not rotate. When the partial circular arc portion does not abut on the circular arc portion, the gear portion with partial no tooth meshes the gear to transmit rotation of the first gear unit to the gear. The two diaphragm plates each on which a rack meshing the pinion is formed, moves in directions opposed to each other according to rotation of the pinion.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: August 27, 2013
    Assignee: JVC Kenwood Corporation
    Inventor: Yasumasa Kansaku
  • DIAPHRAGM DEVICE FOR PROJECTOR
    Publication number: 20120044558
    Abstract: A diaphragm device for projector includes a first gear unit, a second gear unit and two diaphragm plates. The first gear unit includes a partial circular arc portion and a gear portion with partial no tooth. The second gear unit includes a circular arc portion corresponding to the partial circular arc portion, and a pinion and a gear corresponding to the gear portion with partial no tooth. When the partial circular arc portion abuts on the circular arc portion, the gear does not rotate. When the partial circular arc portion does not abut on the circular arc portion, the gear portion with partial no tooth meshes the gear to transmit rotation of the first gear unit to the gear. The two diaphragm plates each on which a rack meshing the pinion is formed, moves in directions opposed to each other according to rotation of the pinion.
    Type: Application
    Filed: August 16, 2011
    Publication date: February 23, 2012
    Applicant: VICTOR COMPANY OF JAPAN, LIMITED
    Inventor: Yasumasa KANSAKU