Patents by Inventor Syuji Hukunaga

Syuji Hukunaga 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).

  • Control valve for variable displacement compressor
    Patent number: 6524077
    Abstract: A control valve used in a variable displacement compressor includes a valve chamber, a valve body and a pressure sensing chamber. A pressure sensing ball is movably located in the pressure sensing chamber and divides the pressure sensing chamber into a first pressure chamber and a second pressure chamber. First and second pressure monitoring points are located in a refrigerant circuit. The first pressure chamber is exposed to the pressure at the first pressure monitoring point. The second pressure chamber is exposed to the pressure at the second pressure monitoring point. The ball is displaced based on the pressure difference between the first pressure chamber and the second pressure chamber. The position of the valve body is determined based on the position of the pressure sensing member.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: February 25, 2003
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Ken Suitou, Kazuya Kimura, Masahiro Kawaguchi, Masaki Ota, Satoshi Umemura, Tomoji Tarutani, Norio Uemura, Kouji Watanabe, Hideki Higashidouzono, Syuji Hukunaga
  • Control valve for variable displacement compressor
    Publication number: 20020004011
    Abstract: ABSTRACT OF THE DISCLOSURE A control valve used in a variable displacement compressor includes a valve chamber, a valve body and a pressure sensing chamber. A pressure sensing ball is movably located in the pressure sensing chamber and divides the pressure sensing chamber into a first pressure chamber and a second pressure chamber. First and second pressure monitoring points are located in a refrigerant circuit. The first pressure chamber is exposed to the pressure at the first pressure monitoring point. The second pressure chamber is exposed to the pressure at the second pressure monitoring point. The ball is displaced based on the pressure difference between the first pressure chamber and the second pressure chamber. The position of the valve body is determined based on the position of the pressure sensing member.
    Type: Application
    Filed: May 9, 2001
    Publication date: January 10, 2002
    Inventors: Ken Suitou, Kazuya Kimura, Masahiro Kawaguchi, Masaki Ota, Satoshi Umemura, Tomoji Tarutani, Norio Uemura, Kouji Watanabe, Hideki Higashidouzono, Syuji Hukunaga