Patents by Inventor Hideshi Oinuma

Hideshi Oinuma 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).

  • PRESSURE FLUCTUATION ABSORBING STRUCTURE
    Publication number: 20230360626
    Abstract: A pressure fluctuation absorbing structure includes: a perforated member including a plurality of holes for absorbing pressure fluctuation on a surface thereof; and a partition member disposed on the surface of the perforated member and including a partition wall that partitions the plurality of holes in units of a predetermined number of one or more holes, and a space that is formed by the partition wall and corresponds to the predetermined number of one or more holes.
    Type: Application
    Filed: August 25, 2021
    Publication date: November 9, 2023
    Inventors: Tatsuya ISHII, Hideshi OINUMA, Kenichiro NAGAI, Shunji ENOMOTO, Junichi OKI
  • Air conditioning equipment, fan equipment, method of reducing noise of equipment, pressure pulsation reducer for refrigeration cycle equipment, pressure pulsation reducer for pump equipment and method of reducing pressure pulsation of equipment
    Patent number: 7856837
    Abstract: Air conditioning equipment that ensures sufficient noise reduction in the low frequency range of a few hundred hertz or below. The air conditioning equipment is characterized by including a heat exchanger for exchanging heat between air and refrigerant of a refrigeration cycle, a fan that supplies air to the heat exchanger, an air duct in which the fan is installed and through which acoustic waves are propagated, and a plurality of small holes that blows a jet into the air duct and sucks a jet from the air duct by a pressure difference between the blow side and the suction side of the fan.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: December 28, 2010
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Japan Aerospace Exploration Agency
    Inventors: Kouji Yamashita, Tsuyoshi Uchida, Tatsuya Ishii, Katsumi Takeda, Hideshi Oinuma, Kenichiro Nagai
  • Air conditioning equipment, fan equipment, method of reducing noise of equipment, pressure pulsation reducer for refrigeration cycle equipment, pressure pulsation reducer for pump equipment and method of reducing pressure pulsation of equipment
    Publication number: 20070060038
    Abstract: Air conditioning equipment that ensures sufficient noise reduction in the low frequency range of a few hundred hertz or below. The air conditioning equipment is characterized by including a heat exchanger for exchanging heat between air and refrigerant of a refrigeration cycle, a fan that supplies air to the heat exchanger, an air duct in which the fan is installed and through which acoustic waves are propagated, and a plurality of small holes that blows a jet into the air duct and sucks a jet from the air duct by a pressure difference between the blow side and the suction side of the fan.
    Type: Application
    Filed: August 26, 2003
    Publication date: March 15, 2007
    Applicants: MITSUBISHI DENKI KABUSHIKI KAISHA, JAPAN AEROSPACE EXPLORATION AGENCY
    Inventors: Kouji Yamashita, Tsuyoshi Uchida, Tatsuya Ishii, Katsumi Takeda, Hideshi Oinuma, Kenichiro Nagai