Patents by Inventor Kosaku Kitada

Kosaku Kitada 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).

  • Piezoelectric speaker, piezoelectric audio device employing piezoelectric speaker, and sensor with alert device attached
    Patent number: 9031265
    Abstract: A piezoelectric speaker includes: a piezoelectric vibrator including a piezoelectric body formed of a piezoelectric element and a plate-shaped body which has a larger diameter than the piezoelectric body and which is attached to a surface of the piezoelectric body in a concentric form; and a film-shaped body that is provided around the piezoelectric vibrator so as to elastically hold the piezoelectric vibrator. The film-shaped body includes a coarse and dense portion in a circumferential direction thereof, which has a physically coarse portion which can become a mountain portion or a valley portion or both, and which is disposed so as to correspond to a natural frequency of an in-phase mode in which antinodes and nodes are formed in a concentric form. The piezoelectric vibrator and the film-shaped body form a sound producing body.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: May 12, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Minoru Fukushima, Kosaku Kitada, Osamu Akasaka, Akihiro Nishikawa
  • PIEZOELECTRIC SPEAKER, PIEZOELECTRIC AUDIO DEVICE EMPLOYING PIEZOELECTRIC SPEAKER, AND SENSOR WITH ALERT DEVICE ATTACHED
    Publication number: 20110255718
    Abstract: A piezoelectric speaker includes: a piezoelectric vibrator including a piezoelectric body formed of a piezoelectric element and a plate-shaped body which has a larger diameter than the piezoelectric body and which is attached to a surface of the piezoelectric body in a concentric form; and a film-shaped body that is provided around the piezoelectric vibrator so as to elastically hold the piezoelectric vibrator. The film-shaped body includes a coarse and dense portion in a circumferential direction thereof, which has a physically coarse portion which can become a mountain portion or a valley portion or both, and which is disposed so as to correspond to a natural frequency of an in-phase mode in which antinodes and nodes are formed in a concentric form. The piezoelectric vibrator and the film-shaped body form a sound producing body.
    Type: Application
    Filed: December 25, 2009
    Publication date: October 20, 2011
    Applicant: PANASONIC ELECTRIC WORKS CO., LTD.
    Inventors: Minoru Fukushima, Kosaku Kitada, Osamu Akasaka, Akihiro Nishikawa