Patents by Inventor Takakatsu Nozawa

Takakatsu Nozawa 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).

  • Linear actuator
    Patent number: 8723375
    Abstract: A linear actuator includes a coil portion and a shaft portion. The coil portion includes a plurality of coils respectively applied with AC currents having different phases from one another. The shaft portion passes through an inside of the plurality of coils. The shaft portion includes: a plurality of permanent magnets and a plurality of intermediate members. The plurality of permanent magnets is arranged along a central axis C such that opposite magnetization directions face to each other in a direction of the central axis C. Each of the plurality of intermediate members is arranged between adjacent two of the plurality of permanent magnets. A saturation magnetic flux density of each of the plurality of intermediate members is higher than a saturation magnetic flux density of each of the plurality of permanent magnets.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: May 13, 2014
    Assignees: Mitsubishi Heavy Industries, Ltd., Osaka University
    Inventors: Ryota Hiura, Takakatsu Nozawa, Katsuhiro Hirata, Hiroshi Ishiguro, Yoshihiro Nakata
  • LINEAR ACTUATOR
    Publication number: 20110193425
    Abstract: A linear actuator includes a coil portion and a shaft portion. The coil portion includes a plurality of coils respectively applied with AC currents having different phases from one another. The shaft portion passes through an inside of the plurality of coils. The shaft portion includes: a plurality of permanent magnets and a plurality of intermediate members. The plurality of permanent magnets is arranged along a central axis C such that opposite magnetization directions face to each other in a direction of the central axis C. Each of the plurality of intermediate members is arranged between adjacent two of the plurality of permanent magnets. A saturation magnetic flux density of each of the plurality of intermediate members is higher than a saturation magnetic flux density of each of the plurality of permanent magnets.
    Type: Application
    Filed: October 28, 2009
    Publication date: August 11, 2011
    Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., OSAKA UNIVERSITY
    Inventors: Ryota Hiura, Takakatsu Nozawa, Katsuhiro Hirata, Hiroshi Ishiguro, Yoshihiro Nakata