Patents by Inventor Kazumoto Urata

Kazumoto Urata 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 system
    Patent number: 5065588
    Abstract: An air-conditioner system having a compressor, a plurality of heat exchangers for heating or cooling the air in a room, a radiator for transferring heat energy of refrigerant outside of the room, a plurality of orifices, a manifold with a main port and a plurality of sub-ports, flow direction control multi-port valves directing the flow of the refrigerant from the compressor to the main port and not from the main port to the compressor when at least one of the heat-exchangers is heating the room. The refrigerant does not flow from the compressor to the radiator when at least one of the heat exchangers is heating and none of the heat exchangers is cooling. Also, it does not flow from the compressor to the main port but flows instead from the compressor to the radiator and from the main port to the compressor when none of the heat exchangers is heating and at least one of the heat exchangers is cooling.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: November 19, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Susumu Nakayama, Kensaku Oguni, Hiromu Yasuda, Rumi Minakata, Kazumoto Urata, Masatoshi Muramatsu, Kenji Tokusa, Takao Senshu, Hirokiyo Terada, Fumihiko Kitani