Patents by Inventor Hitomi Tsuchiya

Hitomi Tsuchiya 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).

  • Composition containing refrigerant comprising R32, R125, R143A, R1234YF and R134A, and refrigeration method, refrigerator operating method and refrigerator using said composition
    Patent number: 11952529
    Abstract: The present invention provides a refrigerant-containing composition by using a refrigerant that has a refrigerating capacity equivalent to that of widely used R404A, and a low GWP. Specifically, the present invention provides a composition that contains a refrigerant containing difluoromethane (R32), pentafluoroethane (R125), 1,1,1-trifluoroethane (R143a), 2,3,3,3-tetrafluropropene (R1234yf), and 1,1,1,2-tetrafluoroethane (R134a) in specific concentrations.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: April 9, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi Itano, Hitomi Kuroki, Shun Ohkubo, Tatsumi Tsuchiya, Kenji Gobou
  • Refrigerant-containing composition, heat transfer medium, and heat cycle system
    Patent number: 11939515
    Abstract: The present disclosure provides a composition comprising a refrigerant (mixed refrigerant), the composition having three types of performance; i.e., a coefficient of performance (COP) and a refrigerating capacity (Cap) that are equivalent to or higher than those of R404A and/or R410A, and a sufficiently low GWP. The present disclosure specifically provides a composition comprising a refrigerant, the refrigerant comprising difluoromethane (HFC-32), 2,3,3,3-tetrafluoropropene (HFO-1234yf), and at least one of 1,1-difluoroethylene (HFO-1132a) and tetrafluoroethylene (FO-1114).
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: March 26, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi Itano, Shun Ohkubo, Hitomi Kuroki, Yasufu Yamada, Tatsumi Tsuchiya, Kenji Gobou
  • Refrigeration cycle device for vehicle
    Patent number: 11920077
    Abstract: No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner (1) for a vehicle includes a refrigerant circuit (10) and a refrigerant that is sealed in the refrigerant circuit (10). The refrigerant circuit (10) includes a compressor (80), a first heat exchanger (85), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (82), a cooling control valve (87), and a second heat exchanger (86), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: March 5, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji Kumakura, Kazuhiro Furusho, Masaru Tanaka, Shun Ohkubo, Mitsushi Itano, Yuuki Yotsumoto, Akihito Mizuno, Tomoyuki Gotou, Yasufu Yamada, Tatsumi Tsuchiya, Kenji Gobou, Hitomi Kuroki, Daisuke Karube, Tatsuya Takakuwa, Tetsushi Tsuda
  • Refrigerant cycle apparatus
    Patent number: 11912922
    Abstract: A showcase includes a refrigerant circuit and a refrigerant enclosed in the refrigerant circuit. The refrigerant circuit includes a compressor (121), a radiator (122), an expansion valve (123), and an evaporator (124). The refrigerant is a low-GWP refrigerant.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: February 27, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Shinichi Fujinaka, Masaru Tanaka, Shun Ohkubo, Mitsushi Itano, Yuuki Yotsumoto, Akihito Mizuno, Tomoyuki Gotou, Yasufu Yamada, Hitomi Kuroki, Tatsumi Tsuchiya, Kenji Gobou, Daisuke Karube, Tatsuya Takakuwa
  • Composite material for metal gasket
    Patent number: 6607830
    Abstract: The composite material for a metal gasket includes a metal plate; a rubber layer fixed on the surface of the metal plate; and a solid lubricant layer fixed on the rubber layer. The solid lubricant layer contains polytetrafluoroethylene and a resin as main components, and has a friction coefficient equal to 0.15 or lower. Thus, the seal durability of the metal gasket is improved by effectively preventing fretting wear.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: August 19, 2003
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Nippon Leakless Industry Co., Ltd.
    Inventors: Yasunori Murakami, Hitomi Tsuchiya, Naomichi Mitsuyama
  • Composite material for metal gasket
    Publication number: 20020127411
    Abstract: A composite material for a metal gasket is disclosed, including: a metal plate; a rubber layer fixed on the surface of the metal plate; and a solid lubricant layer fixed on the rubber layer. The solid lubricant layer contains polytetrafluoroethylene and a resin as main components, and has a friction coefficient equal to 0.15 or lower.
    Type: Application
    Filed: October 23, 2001
    Publication date: September 12, 2002
    Inventors: Yasunori Murakami, Hitomi Tsuchiya, Naomichi Mitsuyama