Patents by Inventor Ryoichi Honbo

Ryoichi Honbo 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).

  • Commutator motor with brush biased toward initial contact side
    Patent number: 7663286
    Abstract: A motor includes a rotor, a commutator, a brush, and a bias member. The commutator has a rectifying surface. The commutator rectifies an electric current supplied to the rotor through the rectifying surface. The rotor is rotated by being supplied with the electric current. The brush makes contact with the commutator via the rectifying surface. The rotor is supplied with the electric current through the brush. The brush starts making contact with the commutator on an entry side of the brush as the rotor and the commutator rotate with respect to the brush along a rotative direction and the commutator intermittently makes contact with the brush. The bias member biases the brush toward the entry side.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: February 16, 2010
    Assignee: Denso Corporation
    Inventors: Toshihiko Muramatsu, Yukio Inuzuka, Ryoichi Honbo, Masashi Miyamoto
  • Brush, commutator, and commutator device
    Patent number: 7586230
    Abstract: In a commutator of a rotary electric machine, each of commutator segments has a low-resistive layer made of a low-resistive material and a high-resistive layer made of a high-resistive material having a specific resistance higher than that of the low-resistive material. The low-resistive material contains a carbonic material and a binder. The high-resistive material contains a carbonic material, a binder and an inorganic substance such as boron nitride. A mixing ratio of the inorganic material to the high-resistive material is more than 20 wt %. Alternatively, a brush, which makes contact with the commutator segments, can have the high-resistive layer and the low-resistive layer.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: September 8, 2009
    Assignees: Denso Corporation, Tris, Inc.
    Inventors: Hirotake Hamamatsu, Youichi Murakami, Ryoichi Honbo, Kenzo Kiyose, Mitsuo Ikeda, Yoichi Sakaura, Shinya Nakagawa, Makoto Nishio
  • Commutator motor
    Publication number: 20070013260
    Abstract: A motor includes a rotor, a commutator, a brush, and a bias member. The commutator has a rectifying surface. The commutator rectifies an electric current supplied to the rotor through the rectifying surface. The rotor is rotated by being supplied with the electric current. The brush makes contact with the commutator via the rectifying surface. The rotor is supplied with the electric current through the brush. The brush starts making contact with the commutator on an entry side of the brush as the rotor and the commutator rotate with respect to the brush along a rotative direction and the commutator intermittently makes contact with the brush. The bias member biases the brush toward the entry side.
    Type: Application
    Filed: July 10, 2006
    Publication date: January 18, 2007
    Applicant: DENSO CORPORATION
    Inventors: Toshihiko Muramatsu, Yukio Inuzuka, Ryoichi Honbo, Masashi Miyamoto
  • Copper-graphite brush
    Patent number: 7067951
    Abstract: A copper-zinc alloy powder of which zinc content is from 10 to 50 wt % and of which mean particle diameter is from 15 ?m or under is added to a Pb-less brush body comprising graphite, copper and a metal sulfide solid lubricant of a copper-graphite brush.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: June 27, 2006
    Assignees: Tris Inc., Denso Corporation
    Inventors: Takayoshi Otani, Masakiyo Shimada, Hirotada Kanagawa, Yukinobu Isoda, Kyoji Inukai, Youichi Murakami, Yasuyuki Wakahara, Masami Niimi, Ryoichi Honbo
  • Brush, commutator, and commutator device
    Publication number: 20060131983
    Abstract: In a commutator of a rotary electric machine, each of commutator segments has a low-resistive layer made of a low-resistive material and a high-resistive layer made of a high-resistive material having a specific resistance higher than that of the low-resistive material. The low-resistive material contains a carbonic material and a binder. The high-resistive material contains a carbonic material, a binder and an inorganic substance such as boron nitride. A mixing ratio of the inorganic material to the high-resistive material is more than 20 wt %. Alternatively, a brush, which makes contact with the commutator segments, can have the high-resistive layer and the low-resistive layer.
    Type: Application
    Filed: November 30, 2005
    Publication date: June 22, 2006
    Applicants: Denso Corporation, TRIS Inc.
    Inventors: Hirotake Hamamatsu, Youichi Murakami, Ryoichi Honbo, Kenzo Kiyose, Mitsuo Ikeda, Yoichi Sakaura, Shinya Nakagawa, Makoto Nishio
  • Metal-graphite brush and production method thereof
    Publication number: 20030190249
    Abstract: Ag particles produced by chemical reduction and having a mean particle size of 5 &mgr;m are added by 0.05-3 wt % and Zn are added by 2-10 wt % to a Pb-less brush body containing graphite, Cu and a metal sulfide solid lubricant of a metal-graphite brush.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 9, 2003
    Applicants: TRIS Inc., DENSO CORPORATION
    Inventors: Takayoshi Otani, Osamu Takada, Mitsuo Ikeda, Yoichi Sakaura, Naoki Morita, Takahiro Sakamoto, Kyoji Inukai, Youichi Murakami, Yasuyuki Wakahara, Masami Niimi, Ryoichi Honbo
  • Copper-graphite brush
    Publication number: 20030141777
    Abstract: A copper-zinc alloy powder of which zinc content is from 10 to 50 wt % and of which mean particle diameter is from 15 &mgr;m or under is added to a Pb-less brush body comprising graphite, copper and a metal sulfide solid lubricant of a copper-graphite brush.
    Type: Application
    Filed: January 27, 2003
    Publication date: July 31, 2003
    Applicant: TRIS Inc.
    Inventors: Takayoshi Otani, Masakiyo Shimada, Hirotada Kanagawa, Yukinobu Isoda, Kyoji Inukai, Youichi Murakami, Yasuyuki Wakahara, Masami Niimi, Ryoichi Honbo