Patents by Inventor Miyako Asagoe

Miyako Asagoe 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).

  • Device for reducing pulsation in a variable displacement compressor
    Patent number: 8366407
    Abstract: The present invention is directed to provide a device for reducing pulsation in a variable displacement compressor. The compressor is connected to an external refrigerant circuit. The device for reducing pulsation includes a flow passage and a control valve. The control valve includes a valve housing, a spool valve and a damper chamber. The spool valve has formed therethrough a flow hole. The damper chamber communicates with the flow passage adjacent to the external refrigerant circuit through the flow hole. Effective cross-sectional area and effective length of the flow hole are determined based on frequency of a specific pulsation of the refrigerant gas and volume of the damper chamber at the time of the development of the specific pulsation in such a manner that the specific pulsation is developed, resonance effect of a Helmholtz resonator takes place in the damper chamber.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: February 5, 2013
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Shiro Hayashi, Hideki Mizutani, Sokichi Hibino, Suehiro Fukazawa, Taro Ozeki, Miyako Asagoe
  • Device for reducing pulsation in a variable displacement compressor
    Publication number: 20080199329
    Abstract: The present invention is directed to provide a device for reducing pulsation in a variable displacement compressor. The compressor is connected to an external refrigerant circuit. The device for reducing pulsation includes a flow passage and a control valve. The control valve includes a valve housing, a spool valve and a damper chamber. The spool valve has formed therethrough a flow hole. The damper chamber communicates with the flow passage adjacent to the external refrigerant circuit through the flow hole. Effective cross-sectional area and effective length of the flow hole are determined based on frequency of a specific pulsation of the refrigerant gas and volume of the damper chamber at the time of the development of the specific pulsation in such a manner that the specific pulsation is developed, resonance effect of a Helmholtz resonator takes place in the damper chamber.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 21, 2008
    Inventors: Shiro Hayashi, Hideki Mizutani, Sokichi Hibino, Suehiro Fukazawa, Taro Ozeki, Miyako Asagoe