Patents by Inventor Sadao Okawa

Sadao Okawa 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).

  • Patent number: 7004425
    Abstract: A missile to be fired from a barrel contains a tail, a tail sleeve attached to the tail, a stop element fixed to the tail sleeve, and a movable structural part disposed at the tail. Fin assembly wings are provided and are to be released from a subcaliber launch position to an overcaliber functional position by the movable structural part moving toward the stop element through a given distance. A pressure area is disposed between the tail end surface and the movable structural part. A propellant gas enters the pressure area during the firing of the missile, for moving the movable structural part away from the tail end surface against the stop element after firing. Bearing shafts are supported by the tail sleeve, the fin assembly wings are configured as a wrap around tail fin assembly held about the bearing shafts.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: February 28, 2006
    Assignee: Diehl Munitionssysteme GmbH & Co. KG
    Inventors: Shinichi Okada, Sadao Okawa, Masato Shinomiya, Makoto Mochizuki
  • Publication number: 20050145750
    Abstract: A missile to be fired from a barrel contains a tail, a tail sleeve attached to the tail, a stop element fixed to the tail sleeve, and a movable structural part disposed at the tail. Fin assembly wings are provided and are to be released from a subcaliber launch position to an overcaliber functional position by the movable structural part moving toward the stop element through a given distance. A pressure area is disposed between the tail end surface and the movable structural part. A propellant gas enters the pressure area during the firing of the missile, for moving the movable structural part away from the tail end surface against the stop element after firing. Bearing shafts are supported by the tail sleeve, the fin assembly wings are configured as a wrap around tail fin assembly held about the bearing shafts.
    Type: Application
    Filed: February 6, 2003
    Publication date: July 7, 2005
    Inventors: Shinichi Okada, Sadao Okawa, Masato Shinomiya, Makoto Mochizuki
  • Patent number: 5311560
    Abstract: A frequency synthesizer which can effect a high speed frequency hopping operation without causing deterioration in stability in phase and frequency in a phase frequency-locked condition and also in output spurious characteristic is disclosed. An output range controlling circuit clips the output voltage of a phase frequency to voltage converting circuit at a voltage corresponding to an input signal. The phase frequency to voltage converting circuit outputs a voltage corresponding to a pulse width inputted thereto from a phase frequency detector. A low-pass filter removes high frequency components of a signal inputted thereto. A voltage-controlled oscillator outputs a signal having a frequency corresponding to a voltage of a signal having passed through the low-pass filter. The phase frequency detector effects phase frequency detection between a reference signal and a signal obtained by frequency dividing the output of the voltage-controlled oscillator by an arbitrary value by a variable frequency divider.
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: May 10, 1994
    Assignee: NEC Corporation
    Inventors: Satoshi Tatsumi, Sadao Okawa