Patents by Inventor Keizo Iwata

Keizo Iwata 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 conditioning apparatus having ambient air-conditioning unit and a plurality of personal air-conditioning units connected to outdoor unit
    Patent number: 5317907
    Abstract: In an air conditioning apparatus, the refrigerant discharged from a compressor of an outdoor unit is passed through an outdoor heat exchanger, the refrigerant having passed through the outdoor heat exchanger is passed through an indoor heat exchanger of an ambient air-conditioning unit and the refrigerant having passed through the indoor heat exchanger is returned to the compressor to cool the whole space in the room. At the same time, the refrigerant discharged from the compressor is passed through the outdoor heat exchanger, the refrigerant having passed through the outdoor heat exchanger is passed through indoor heat exchangers of a plurality of personal air-conditioning units and the refrigerant having passed through the indoor heat exchangers is returned to the compressor to separately cool the discrete spaces in the room.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: June 7, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiichiro Shimizu, Eiji Kuwahara, Manabu Kitamoto, Masao Amano, Yasunori Ichikawa, Masayuki Hibi, Keizo Iwata
  • Air conditioning apparatus with indoor units installed on ceiling and floor in room
    Patent number: 5218838
    Abstract: Two or more indoor units are provided on ceiling and floor of a room. Each of the indoor units has an air heat exchanger for cooling indoor air, and a drain pan for catching drainage produced by the air heat exchanger. A drain pipe is provided in the ceiling and under the floor. The, drainage in each of the drain pans flows into the drainage pipe. The drain in the drain pipe is carried and discharged outdoor by a drain carrying unit.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: June 15, 1993
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Manabu Kitamoto, Yasunori Ichikawa, Keiichiro Shimizu, Eiji Kuwahara, Masao Amano, Masayuki Hibi, Keizo Iwata