Patents by Inventor Shouichiro Terauchi

Shouichiro Terauchi 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).

  • Internal magnetic circuit and loudspeaker system incorporating the same
    Patent number: 7120271
    Abstract: An internal magnetic circuit is formed by a plate forming a pole piece, a vertically magnetized magnet attached to a bottom face of the plate, and a yoke attached to a bottom face of the magnet. A magnetic gap is formed between the plate and the yoke. The yoke includes a bottom part attached to the bottom face of the magnet, a side part standing on the side of the plate, and a folded-back part folding downwards over the side part to face the magnetic gap. Thus, the internal magnetic circuit having a uniform magnetic flux density inside the magnetic gap along the direction of its length is provided.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: October 10, 2006
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Hiroyuki Kobayashi, Hiroyuki Dohi, Shouichiro Terauchi, Takashi Ohyaba
  • Internal magnetic circuit and loudspeaker system incorporating the same
    Publication number: 20040005075
    Abstract: An internal magnetic circuit is formed by a plate forming a pole piece, a vertically magnetized magnet attached to a bottom face of the plate, and a yoke attached to a bottom face of the magnet. A magnetic gap is formed between the plate and the yoke. The yoke includes a bottom part attached to the bottom face of the magnet, a side part standing on the side of the plate, and a folded-back part folding downwards over the side part to face the magnetic gap. Thus, the internal magnetic circuit having a uniform magnetic flux density inside the magnetic gap along the direction of its length is provided.
    Type: Application
    Filed: June 13, 2003
    Publication date: January 8, 2004
    Applicants: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Hiroyuki Kobayashi, Hiroyuki Dohi, Shouichiro Terauchi, Takashi Ohyaba
  • Surroundless loudspeaker
    Patent number: 5848173
    Abstract: A cylindrical frame is mounted in a cabinet and a magnetic circuit is provided at an end of the frame. A diaphragm having a peripheral free edge is connected to a coil bobbin and a cylindrical ring is secured to the free end edge and disposed in a cylindrical supporting portion of the frame. An annular sealing member is secured to the cylindrical ring so that an outside peripheral wall thereof is slidably contacted with an inside wall of the cylindrical supporting portion of the frame.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: December 8, 1998
    Assignee: Pioneer Electronic Corporation
    Inventors: Yoko Sato, Satoshi Kumada, Ziging Zhang, Junko Oba, Shinji Koyano, Takashi Morishige, Kohshiro Kogure, Yuichi Mohri, Tomohiro Suenaga, Shouichiro Terauchi, Tatsuya Ando, Takanobu Saito, Takashi Ohyaba, Shunichi Takahashi, Teruo Baba
  • Loudspeaker for higher audio frequencies and a manufacturing method thereof
    Patent number: 5719946
    Abstract: A loudspeaker has a first diaphragm having a domed shape, a second diaphragm formed on a periphery of the first diaphragm, and a voice coil provided at a juncture of the first and second diaphragms. The second diaphragm is designed such that a dip frequency by shape effect thereof is positioned at a frequency higher than a high limit frequency of the first diaphragm.
    Type: Grant
    Filed: August 2, 1995
    Date of Patent: February 17, 1998
    Assignee: Pioneer Electronic Corporation
    Inventors: Shouichiro Terauchi, Tomohiro Suenaga, Masaharu Yoneyama, Takanobu Saito