Patents by Inventor Takaaki Ohtsuka

Takaaki Ohtsuka 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: 6769481
    Abstract: An object of the present invention is to provide an outdoor heat exchanger unit which is hardly effected adverse effects of the gas engine waste heat during the cooling operation and which can improve an efficiency of the refrigerant cycle, and which can improve the heating ability by utilizing the gas engine waste heat; an outdoor unit comprising the outdoor heat exchanger unit; and an air conditioner comprising the outdoor heat exchanger unit; in order to achieve the object, the present invention provide an outdoor heat exchanger unit for a gas heat pump type air conditioner, in which a compressor for compressing a refrigerant is driven by a gas engine, and which comprises a heat pump for utilizing waste heat of said gas engine to perform a heating and a cooling operations: wherein said outdoor heat exchanger unit comprises a radiator provided in a cooling water system in which cooling water for said gas engine circulates and an outdoor heat exchanger apparatus provided in a refrigerant circuit in which sai
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: August 3, 2004
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Atsushi Yoshimura, Hideaki Kasahara, Takaaki Ohtsuka, Jiro Tanaka
  • Patent number: 6425257
    Abstract: An object of the present invention is to provide an air conditioner which can efficiently vaporize the refrigerant using the waste heat of the engine; which has a stable heating capability regardless of the temperature of the outside air, and which can decease the electric power required for the fan and thereby decrease the noise due to the fan, in a heating operation; in order to achieve the object, the present invention provide an air conditioner comprising: a refrigerant circuit comprising a compressor for compressing a refrigerant; an outer heat exchanger for exchanging heat between the refrigerant and outside air; a restrictor for restricting the refrigerant flowing out from a water heat exchanger; and an inner heat exchanger for exchanging heat between inside air and the refrigerant; an engine cooling water circuit comprising an engine for driving the compressor; and a radiator for exchanging heat between engine cooling water and outside air; and a water heat exchanger for exchanging heat between the re
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: July 30, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shigeki Ohseki, Takaaki Ohtsuka, Hideaki Kasahara, Atsushi Yoshimura
  • Publication number: 20020050351
    Abstract: An object of the present invention is to provide an outdoor heat exchanger unit which is hardly effected adverse effects of the gas engine waste heat during the cooling operation and which can improve an efficiency of the refrigerant cycle, and which can improve the heating ability by utilizing the gas engine waste heat; an outdoor unit comprising the outdoor heat exchanger unit; and an air conditioner comprising the outdoor heat exchanger unit; in order to achieve the object, the present invention provide an outdoor heat exchanger unit for a gas heat pump type air conditioner, in which a compressor for compressing a refrigerant is driven by a gas engine, and which comprises a heat pump for utilizing waste heat of said gas engine to perform a heating and a cooling operations: wherein said outdoor heat exchanger unit comprises a radiator provided in a cooling water system in which cooling water for said gas engine circulates and an outdoor heat exchanger apparatus provided in a refrigerant circuit in which sai
    Type: Application
    Filed: October 26, 2001
    Publication date: May 2, 2002
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Atsushi Yoshimura, Hideaki Kasahara, Takaaki Ohtsuka, Jiro Tanaka
  • Patent number: 4041170
    Abstract: 2-Carbamoyl-3-N-(3',5'-dichlorophenyl)-carbamoyl-5,6-dihydro-p-dithiin-1-ox ide as effective substance for the control of agricultural plant diseases.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: August 9, 1977
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takaaki Ohtsuka, Keigo Satake, Shiro Yamazaki, Nobuo Hatakeyama, Takeo Watanabe
  • Patent number: 4007279
    Abstract: A fungicidal compound having a general structure corresponding to a member selected from the group of 2,3-dicyano-5,6-dihydro-p-dithiin and its 5-alkyl derivatives, as expressed by the following general formula: ##STR1## wherein R stands for H or an alkyl radical of C.sub.1 - C.sub.6.
    Type: Grant
    Filed: January 28, 1975
    Date of Patent: February 8, 1977
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takaaki Ohtsuka, Keigo Satake, Shiro Yamazaki, Takeo Watanabe