Patents by Inventor Tohru Nishikura

Tohru Nishikura 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: 5965949
    Abstract: An engine-driven generator incorporating an engine and a generator into a single unit, with the output shaft of the engine coaxially connected to the rotating shaft of the generator, via a frame structure formed by integrally combining two support members provided in parallel with the axial line of the output and rotating shafts with two handle members orthogonally intersecting the aforementioned axial line via upright members wherein base members are fixedly fitted between the support members below the engine and the generator in such a manner as to orthogonally intersecting the aforementioned support members; a generator mounting member, having a mounting hole in the axial direction, provided between a bulged portion integrally protruded on the lower part a rear bracket of the generator and a base member below the generator, and two engine mounting members provided between the engine and a base member below the engine are disposed at the apexes of a triangle, so that the engine and the generator are mounted
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: October 12, 1999
    Assignee: Sawafuji Electric Co., Ltd.
    Inventors: Masahiro Fukuda, Tohru Yoshioka, Tohru Nishikura, Masaru Sakamoto
  • Patent number: 5811907
    Abstract: A small generator comprising a stator having slots on the inner circumferential surface thereof and generating windings wound on the slots, and a salient-pole type rotor freely rotating inside the stator, in which the stator has a plurality of recesses whose width is essentially the same as the width of openings of the slots and whose area is smaller than the area of the slots, provided at the same intervals as the circumferential intervals of the slots in the vicinity of the opening of the slots; the rotor has circular-arc shaped bulged portions formed outside a shaft hole on the rotor, and crimping portions whose width is smaller than the diameter of a shaft hole provided at the center of the bulged portions; the width of the magnetic path of the rotor winding portion is made more than twice as large as the minimum slot back length of the slots provided on the stator.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: September 22, 1998
    Assignee: Sawafuji Electric Co., Ltd.
    Inventors: Masahiro Fukuda, Tohru Yoshioka, Youichi Haruta, Tohru Nishikura