Patents by Inventor Shouji Arakawa

Shouji Arakawa 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).

  • Air conditioner having a temperature dependent control device
    Patent number: 4698981
    Abstract: An air conditioner has a refrigeration system comprising by a compressor, a reversing valve, an indoor heat exchanger, an expansion device and an outdoor heat exchanger which are connected in series to form a closed system, a bypass pipe equiped with a two-way valve, connected in parallel with the outdoor heat exchanger between the delivery side of the compressor and the refrigerant inlet side of the outdoor heat exchanger. An outdoor blower is provided for the outdoor heat exchanger. The two-way valve is adapted to permit hot refrigerant gas delivered by the compressor to be recirculated through the outdoor heat exchanger thereby effecting defrosting of the outdoor heat exchanger.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: October 13, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Tomomichi Kaneko, Shigeyasu Suzuki, Shouji Arakawa