Patents by Inventor Akira Naitoh

Akira Naitoh 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).

  • Patent number: 4926075
    Abstract: An electric motor includes a commutator and a brush assembly. The brush assembly includes a pair of brushes, each disposed in operative relation to the commutator, a pair of brush holders each supporting at least one of the brushes, and an assembly base (69, 74) for securing the brush holders thereto. The assembly base includes a base plate of insulating material and at least two severable conductive passages (71, 72) each secured to the base plate. The conductive passages are adapted to supply electric current to the pair of brushes from different directions and drive the electric motor for rotation in either forward or reverse direction when either one of the passages is severed for permitting use of a single brush assembly in different kinds of motors.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: May 15, 1990
    Assignee: Makita Electric Works, Ltd.
    Inventors: Fusao Fushiya, Kenji Yoshida, Akira Naitoh, Tetsuya Sawa
  • Patent number: 4851730
    Abstract: A brush holder assembly for a commutator type electric motor includes a substantially circular base plate of insulating material having a central aperture for receiving the motor commutator. The base plate includes a pair of brush holders for supporting brushes in operative relation to the commutator. A pair of conductive members are embedded in the base plate. Each conductive member has a brush holder mounting portion exposed on both sides of the base plate and a connecting terminal for electrical connection to the corresponding terminal of the stator coils. Power connecting means is provided on the base plate for electrically connecting the terminals of the stator coils to an electrical power source.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: July 25, 1989
    Assignee: Makita Electric Works, Ltd.
    Inventors: Fusao Fushiya, Kenji Yoshida, Akira Naitoh