Patents by Inventor Noboru Yoshikawa

Noboru Yoshikawa 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).

  • Plane commutator of motor having a base made of conductive powder
    Patent number: 6833650
    Abstract: A plane commutator is comprised of a plurality of commutator segments, a plurality of base plate and a resinous boss member. The commutators are made of sintered carbon compound and disposed to provide a plane commutator surface at an end thereof and a base portion at the other end. Each commutator segment has a projection extending from the base portion. The resinous boss member is disposed in contact with the base portion. Each base plate has an engagement hole, to which one of the projections is fitted, and a terminal portion that extends along an outer periphery of the boss member. A powder-accommodation pocket is formed around a foot of each the projection so that the projection can be shaved by a corner edge of the hole. This ensures good contact of the commutators with the metal base plates and provides a sufficient manufacturing tolerance.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: December 21, 2004
    Assignees: DENSO Corporation, TRIS Inc.
    Inventors: Yusuke Hara, Syouichi Takenouchi, Satoshi Sugiyama, Masahiro Takahama, Kenzo Kiyose, Yoshihiro Teramoto, Noboru Yoshikawa
  • Plane commutator of motor and method of manufacturing the same
    Publication number: 20030094877
    Abstract: A plane commutator is comprised of a plurality of commutator segments, a plurality of base plate and a resinous boss member. The commutators are made of sintered carbon compound and disposed to provide a plane commutator surface at an end thereof and a base portion at the other end. Each commutator segment has a projection extending from the base portion. The resinous boss member is disposed in contact with the base portion. Each base plate has an engagement hole, to which one of the projections is fitted, and a terminal portion that extends along an outer periphery of the boss member. A powder-accommodation pocket is formed around a foot of each the projection so that the projection can be shaved by a corner edge of the hole. This ensures good contact of the commutators with the metal base plates and provides a sufficient manufacturing tolerance.
    Type: Application
    Filed: June 5, 2001
    Publication date: May 22, 2003
    Inventors: Yusuke Hara, Syouichi Takenouchi, Satoshi Sugiyama, Masahiro Takahama, Kenzo Kiyose, Yoshihiro Teramoto, Noboru Yoshikawa
  • Carbon commutator
    Patent number: 6259183
    Abstract: Disclosed is a carbon commutator, comprising a plurality of metal segments each having a through-hole, a plurality of carbon segments each having a projecting portion, which contains a metal, being inserted into the through-hole to be deformed so as to join the carbon segment to the metal segment, and a commutator body on which a plurality of the metal/carbon joined segments are arranged fixedly in a manner to form a substantially circular body.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: July 10, 2001
    Assignee: TRIS Inc.
    Inventors: Tokio Hotta, Noboru Yoshikawa, Yoichi Sakaura