Patents by Inventor Shoichi Toyoda

Shoichi Toyoda 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).

  • Speaker and manufacturing method
    Publication number: 20080002850
    Abstract: Designing of a magnetic circuit without constraints of a shape of a diaphragm offers an enhancement in the degree of design freedom of a speaker. A diaphragm has a dome and an edge formed integrally with the dome. A coupling supporter is fixed to a boundary portion between the dome and the edge of the diaphragm and extends either inward or outward from the boundary portion in a radial direction of the diaphragm. A voice coil is fixed to a peripheral side of the coupling supporter. A magnetic circuit has a magnetic gap housing the voice coil.
    Type: Application
    Filed: June 15, 2007
    Publication date: January 3, 2008
    Inventors: Kazuaki Watanabe, Masanori Ito, Shoichi Toyoda
  • Butterfly damper
    Patent number: 6820719
    Abstract: A butterfly damper comprises an inner circumferential frame, an outer circumferential frame and at least one arm member. The arm member has one end connected to the outer circumferential frame and the other end connected to the inner circumferential frame. The arm member has a racetrack-shaped cross section.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: November 23, 2004
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventor: Shoichi Toyoda
  • Butterfly damper
    Patent number: 6789643
    Abstract: A butterfly damper comprises an inner circumferential frame, an outer circumferential frame and at least one arm member. The outer circumferential frame has opposite end surfaces and an inner peripheral surface. The inner peripheral surface is connected to the opposite end surfaces to form opposite connecting edge portions. The arm member has one end connected to the outer circumferential frame and the other end connected to the inner circumferential frame. The one end of the arm member is connected to a portion of the inner peripheral surface of the outer circumferential frame, which portion exclude the opposite connecting edge portions.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: September 14, 2004
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventor: Shoichi Toyoda
  • Butterfly damper
    Publication number: 20020144857
    Abstract: A butterfly damper comprises an inner circumferential frame, an outer circumferential frame and at least one arm member. The arm member has one end connected to the outer circumferential frame and the other end connected to the inner circumferential frame. The arm member has a racetrack-shaped cross section.
    Type: Application
    Filed: January 23, 2002
    Publication date: October 10, 2002
    Applicant: PIONEER CORPORATION
    Inventor: Shoichi Toyoda
  • Butterfly damper
    Publication number: 20020144858
    Abstract: A butterfly damper comprises an inner circumferential frame, an outer circumferential frame and at least one arm member. The outer circumferential frame has opposite end surfaces and an inner peripheral surface. The inner peripheral surface is connected to the opposite end surfaces to form opposite connecting edge portions. The arm member has one end connected to the outer circumferential frame and the other end connected to the inner circumferential frame. The one end of the arm member is connected to a portion of the inner peripheral surface of the outer circumferential frame, which portion exclude the opposite connecting edge portions.
    Type: Application
    Filed: January 23, 2002
    Publication date: October 10, 2002
    Applicant: PIONEER CORPORATION
    Inventor: Shoichi Toyoda