Patents by Inventor Hiroki Tomoda

Hiroki Tomoda 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).

  • Lubricating oil circulating device for compressor
    Patent number: 8029255
    Abstract: It provides at a low price a compressor capable of preventing a waste oil pipe from falling off and curbing leakage of lubricating oil and oscillation of the pipe. An L-shaped waste oil pipe 8 for returning lubricating oil 20 to a bottom of a motor chamber 22 is connected to a waste oil passage 33 of a main frame 3 so as to put at least a part of the waste oil pipe 8 in elastic contact with an internal surface of an airtight container 2.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: October 4, 2011
    Assignee: Fujitsu General Limited
    Inventors: Naoya Morozumi, Yasuhiro Sakakibara, Makoto Araki, Hiroki Tomoda, Toshihiko Fukuda
  • Compressor
    Publication number: 20060099086
    Abstract: It provides at a low price a compressor capable of preventing a waste oil pipe from falling off and curbing leakage of lubricating oil and oscillation of the pipe. An L-shaped waste oil pipe 8 for returning lubricating oil 20 to a bottom of a motor chamber 22 is connected to a waste oil passage 33 of a main frame 3 so as to put at least a part of the waste oil pipe 8 in elastic contact with an internal surface of an airtight container 2.
    Type: Application
    Filed: November 4, 2005
    Publication date: May 11, 2006
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Naoya Morozumi, Yasuhiro Sakakibara, Makoto Araki, Hiroki Tomoda, Toshihiko Fukuda
  • Air conditioner
    Patent number: 6276149
    Abstract: In an air conditioner having a refrigerant circuit in which a compressor, a four-way switching valve, an outdoor-side heat exchanger, an expansion valve, and an indoor-side heat exchanger are connected in succession via pipes, the interior of an enclosed vessel of a compressor, which contains a refrigerant compressing section and an electric motor, is divided airtightly into a refrigerant discharge chamber and an electric motor chamber, two refrigerant flow path pipes are provided on the electric motor chamber side, and these refrigerant flow path pipes are appropriately switched to the refrigerant discharge side and the refrigerant suction side of the compressor via the four-way switching valve, whereby one compressor can be used as an internal high pressure type or an internal low pressure type.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: August 21, 2001
    Assignee: Fujitsu General Limited
    Inventors: Masashi Katayama, Makoto Araki, Masaki Fujino, Jyunya Tanaka, Motonobu Furukawa, Akira Shimada, Shuji Takeda, Hiroki Tomoda, Mitsuru Shiraishi, Keiichi Nakamura, Takefumi Inagaki
  • Air conditioner
    Publication number: 20010001923
    Abstract: In an air conditioner having a refrigerant circuit in which a compressor, a four-way switching valve, an outdoor-side heat exchanger, an expansion valve, and an indoor-side heat exchanger are connected in succession via pipes, the interior of an enclosed vessel of a compressor, which contains a refrigerant compressing section and an electric motor, is divided airtightly into a refrigerant discharge chamber and an electric motor chamber, two refrigerant flow path pipes are provided on the electric motor chamber side, and these refrigerant flow path pipes are appropriately switched to the refrigerant discharge side and the refrigerant suction side of the compressor via the four-way switching valve, whereby one compressor can be used as an internal high pressure type or an internal low pressure type.
    Type: Application
    Filed: January 24, 2001
    Publication date: May 31, 2001
    Inventors: Masashi Katayama, Makoto Araki, Masaki Fujino, Jyunya Tanaka, Motonobu Furukawa, Akira Shimada, Shuji Takeda, Hiroki Tomoda, Mitsuru Shiraishi, Keiichi Nakamura, Takefumi Inagaki
  • Air conditioner
    Patent number: 6202428
    Abstract: In an air conditioner having a refrigerant circuit in which a compressor, a four-way switching valve, an outdoor-side heat exchanger, an expansion valve, and an indoor-side heat exchanger are connected in succession via pipes, the interior of an enclosed vessel of a compressor, which contains a refrigerant compressing section and an electric motor, is divided airtightly into a refrigerant discharge chamber and an electric motor chamber, two refrigerant flow path pipes are provided on the electric motor chamber side, and these refrigerant flow path pipes are appropriately switched to the refrigerant discharge side and the refrigerant suction side of the compressor via the four-way switching valve, whereby one compressor can be used as an internal high pressure type or an internal low pressure type.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: March 20, 2001
    Assignee: Fujitsu General Limited
    Inventors: Masashi Katayama, Makoto Araki, Masaki Fujino, Jyunya Tanaka, Motonobu Furukawa, Akira Shimada, Shuji Takeda, Hiroki Tomoda, Mitsuru Shiraishi, Keiichi Nakamura, Takefumi Inagaki