Patents by Inventor Osamu Yagisawa

Osamu Yagisawa 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).

  • Antivibration actuator and lens unit and camera equipped with same
    Patent number: 8400514
    Abstract: The present invention is an antivibration actuator including an affixing plate (12), a moving frame (14) to which an image stabilizing lens (16) is attached, and a drive means for generating drive force in a first direction and a second direction; the drive means is furnished with a drive magnet (22) and a first drive coil (20a) and second drive coil (20b) disposed on substantially the same plane so as to face that the drive magnet; a first magnetic boundary line (C1) and a second magnetic boundary line (C2) disposed to connect to the first magnetic boundary line are provided on the drive magnet, and when current flows, a first direction drive force is generated; the second drive coil is disposed to face the second magnetic boundary line, and when current flows, a second direction drive force is generated.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: March 19, 2013
    Assignee: Tamron Co., Ltd.
    Inventor: Osamu Yagisawa
  • Antivibration actuator and lens unit and camera equipped with same
    Publication number: 20110176012
    Abstract: The present invention is an antivibration actuator including an affixing plate (12), a moving frame (14) to which an image stabilizing lens (16) is attached, and a drive means for generating drive force in a first direction and a second direction; the drive means is furnished with a drive magnet (22) and a first drive coil (20a) and second drive coil (20b) disposed on substantially the same plane so as to face that the drive magnet; a first magnetic boundary line (C1) and a second magnetic boundary line (C2) disposed to connect to the first magnetic boundary line are provided on the drive magnet, and when current flows, a first direction drive force is generated; the second drive coil is disposed to face the second magnetic boundary line, and when current flows, a second direction drive force is generated.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 21, 2011
    Inventor: Osamu Yagisawa
  • Optical pickup apparatus
    Patent number: 6175545
    Abstract: An optical disk recording and/or reproducing apparatus records and/or reproduces information on an information record surface of an optical disk loaded thereto.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: January 16, 2001
    Assignee: Pioneer Electronic Corporation
    Inventors: Yusuke Akama, Isami Kenmotsu, Tomonari Ishikawa, Osamu Yagisawa, Katsuhiko Tanimoto
  • Optical pickup apparatus
    Patent number: 5978347
    Abstract: An optical disk recording and/or reproducing apparatus records and/or reproduces information on an information record surface of an optical disk loaded thereto.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: November 2, 1999
    Assignee: Pioneer Electronic Corporation
    Inventors: Yusuke Akama, Isami Kenmotsu, Tomonari Ishikawa, Osamu Yagisawa, Katsuhiko Tanimoto
  • Optical pickup apparatus
    Patent number: 5729522
    Abstract: An optical disk recording and/or reproducing apparatus, records and/or reproduces information on an information record surface of an optical disk loaded thereto.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: March 17, 1998
    Assignee: Pioneer Electronic Corporation
    Inventors: Yusuke Akama, Isami Kenmotsu, Tomonari Ishikawa, Osamu Yagisawa, Katsuhiko Tanimoto
  • Apparatus for injection molding information recording disks
    Patent number: 5006058
    Abstract: An apparatus for injection molding a substrate of an information recording disk in which melted molding material is injected into a mold space after a pair of mold bodies are clamped together. An uneven surface area is provided between a cutting device for cutting the cured molding material at the molding surface and an aperture for supplying the pressurized gas for causing the cured molding material to be released. The flow of pressurized gas through the cut portion of the cured molding material is prevented and force is generated by the pressurized gas causing the cured molding material and a stamper forming the molding surface to release uniformly from the mold.
    Type: Grant
    Filed: December 7, 1988
    Date of Patent: April 9, 1991
    Assignee: Pioneer Electronic Corporation
    Inventors: Haruhisa Maruyama, Ken-ichi Ishiguro, Hiroaki Watanabe, Osamu Yagisawa