Patents by Inventor Masao Yasunaga

Masao Yasunaga 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: 11858310
    Abstract: An air conditioner for a vehicle includes: a case having an air passage; a heat exchanger having a core portion in which heat is exchanged between air and a heat medium; a support portion provided in the case to support a lower portion of the heat exchanger; and a cushioning material interposed between the lower portion of the heat exchanger and the support portion. The lower portion of the heat exchanger has a pipe side adjacent to an inflow pipe or an outflow pipe for the heat medium and an opposite-to-pipe side located on an opposite side of the pipe side. The support portion includes a pipe side support that supports the pipe side, and an opposite-to-pipe side support that supports the opposite-to-pipe side. A surface area of the opposite-to-pipe side support in contact with the cushioning material is larger than that of the pipe side support.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: January 2, 2024
    Assignee: DENSO CORPORATION
    Inventors: Masao Yasunaga, Toshikazu Matsuda
  • Publication number: 20210362560
    Abstract: An air conditioner for a vehicle includes: a case having an air passage; a heat exchanger having a core portion in which heat is exchanged between air and a heat medium; a support portion provided in the case to support a lower portion of the heat exchanger; and a cushioning material interposed between the lower portion of the heat exchanger and the support portion. The lower portion of the heat exchanger has a pipe side adjacent to an inflow pipe or an outflow pipe for the heat medium and an opposite-to-pipe side located on an opposite side of the pipe side. The support portion includes a pipe side support that supports the pipe side, and an opposite-to-pipe side support that supports the opposite-to-pipe side. A surface area of the opposite-to-pipe side support in contact with the cushioning material is larger than that of the pipe side support.
    Type: Application
    Filed: August 5, 2021
    Publication date: November 25, 2021
    Inventors: Masao YASUNAGA, Toshikazu MATSUDA
  • Patent number: 4447196
    Abstract: A vane type rotary compressor has a housing and end plates secured thereto to cooperate therewith to define a cylindrical bore in which a rotor is eccentrically mounted for rotation with vanes slidably mounted in vane grooves formed in the outer periphery of the rotor. A lubricant groove is formed in the inner surface of one end plate and so disposed as to be brought into communication with the inner end portions of the vane grooves pertaining to vanes defining working chambers when in their intake phases. The lubricant groove is connected by a passage with a discharge chamber of the compressor so that fluid pressure is fed into the inner end portions of the vane grooves to urge the vanes into sealing engagement with the inner peripheral surface of the cylindrical bore. A valve is provided to disconnect the discharge chamber from the lubricant groove during normal compression operation of the compressor.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: May 8, 1984
    Assignee: Nippondenso Co., Ltd.
    Inventors: Eiichi Nagasaku, Kimihiro Kato, Masao Yasunaga
  • Patent number: 4441863
    Abstract: A variable discharge rotary compressor has a housing, a rotor disposed therein and vanes mounted on the rotor to cooperate with the housing and the rotor to define variable volume working chambers disposed close to and separated from an intake chamber by an end wall in which a communication passage is formed to communicate the working chambers with the intake chamber. The communication passage is located at a point where the working chambers are in their compression strokes. A valve is disposed in the communication passage to control the communication between the compression chambers and the intake chamber and is operative to communicate the compression chambers with the intake chamber to permit a part of the fluid in the compression chambers to be returned therefrom back into the intake chamber when the discharge of the compressor exceeds a predetermined discharge requirement.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: April 10, 1984
    Assignee: Nippondenso Co., Ltd.
    Inventors: Teruyuki Hotta, Yoshiki Kurokawa, Eiichi Nagasaku, Masao Yasunaga
  • Patent number: 4403929
    Abstract: A rotary compressor including a housing having therein a cylindrical bore, and end plates closing opposite ends of the bore and supporting a rotary shaft supporting in turn a rotor formed with a plurality of circumferentially spaced vane grooves. A vane is slidably received in each vane groove and cooperates with the adjacent vane to define therebetween a working chamber. An oil groove is formed on a surface portion of one of the end plates which surface portion is located opposite to a path along which the bottoms of the vane grooves pass, at least in a position where the working chamber has its volume increased. A cover is attached to the one end plate to define therebetween a discharge chamber receiving therein fluid compressed by the vanes. A passage communicates an oil revervoir defined at the bottom of the discharge chamber and the axial end face of the shaft opposite to the one end plate with each other.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: September 13, 1983
    Assignee: Nippondenso Co., Ltd.
    Inventors: Eiichi Nagasaku, Masao Yasunaga, Kimihiro Kato