Patents by Inventor Toshio Utagawa

Toshio Utagawa 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).

  • Patent number: 4574872
    Abstract: A heat exchanger apparatus includes a cylindrical-shaped heat exchanger formed by alternately laminating first and second elements in the circumferential direction of the cylindrical-shaped heat exchanger. The cylindrical-shaped heat exchanger is rotated to carry out the function of the conventional regenerative rotary type total heat exchanger. In addition, the first and second elements are also allowed to effect a heat exchange or total heat exchange operation. The cylindrical-shaped heat exchanger is either hollow or solid, which provides many variations in arrangement of air ducts for primary and secondary air flows. Further, a partition interposed between the first and second elements has variation in property: permeable to water vapor; non-permeable to water vapor as well as non-hygroscopic; and so forth. The first and second elements exchange heat with each other in a total heat exchange operation mode and a sensible heat exchange operation mode.
    Type: Grant
    Filed: July 3, 1984
    Date of Patent: March 11, 1986
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuyuki Yano, Takuro Kotera, Toshio Utagawa, Akira Aoki, Kazufumi Watanabe, Masao Wakai
  • Patent number: 4478053
    Abstract: An air-conditioning machine having, in blocks within the same box body, an indoor-air circulation wind passage, an outdoor-air circulation wind passage, and a ventilation wind passage. An opposite-flow heat exchanger, designed to recover the heat in the ventilation wind passage, is provided. One of two opposite faces having two wind passage openings in one face of the opposite-flow heat exchanger faces the outdoor-air circulation wind passage. The other thereof faces the indoor-air circulation wind passage. Shutters or dampers are provided on both of the faces. Functions of cooling and heating, heating and exchange ventilation, and simultaneous feed and exhaust non-heat-exchange ventilation can be exhibited.
    Type: Grant
    Filed: April 5, 1983
    Date of Patent: October 23, 1984
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Nobuyuki Yano, Takuro Kotera, Akira Aoki, Toshio Utagawa