Patents by Inventor Kazutaka Kowada

Kazutaka Kowada 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).

  • Publication number: 20050254961
    Abstract: In order to reduce the amount of refrigerant circulating within a variable displacement compressor to thereby improve compression efficiency, a control valve is configured to comprise a ball valve for controlling the flow rate of refrigerant flowing from a discharge chamber to a crankcase, a spool valve for controlling the flow rate of refrigerant flowing from the crankcase to a suction chamber, a diaphragm for sensing suction pressure, and a solenoid for setting the suction pressure, wherein the spool valve starts flow rate control after the ball valve is fully closed or nearly fully closed, and the ball valve starts flow rate control after the valve lift of the spool valve is minimized or nearly minimized.
    Type: Application
    Filed: July 20, 2005
    Publication date: November 17, 2005
    Applicant: ZEXEL VALEO CLIMATE CONTROL CORPORATION
    Inventors: Yuji Kawamura, Kazutaka Kowada, Kazuhiro Irie, Shunji Muta, Yoshie Sato