Patents by Inventor Ko Inagaki

Ko Inagaki 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).

  • Publication number: 20240125333
    Abstract: A suction pipe 200 of a centrifugal compressor 20, the centrifugal compressor 20 having a suction port 22 that is open to direct the working fluid to an impeller 21, the suction pipe 200 including a first opening portion 31 to be directly or indirectly connected to the suction port 22 and a second opening portion 32 positioned upstream from the first opening portion 31 in the flow direction of the working fluid. The second opening portion 32 is positioned below the first opening portion 31 in the vertical direction. The first opening portion 31 and the second opening portion 32 are open toward the same direction.
    Type: Application
    Filed: February 4, 2022
    Publication date: April 18, 2024
    Inventors: Hidetoshi TAGUCHI, Ko INAGAKI, Masaya HONMA, Takumi HIKICHI
  • Patent number: 11959670
    Abstract: The present invention includes: an electric component; a compression component driven by the electric component; and a sealed container accommodating the electric component and the compression component. The compression component includes: a shaft part rotated by the electric component; and a bearing part slidingly contacting the shaft part. A film having hardness equal to or more than hardness of a sliding surface of the bearing part is provided on a sliding surface of the shaft part. The sliding surface of the bearing part includes a curved-surface portion having an inner diameter that continuously increases, or the sliding surface of the shaft part includes a curved-surface portion having an outer diameter that continuously decreases.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: April 16, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshinori Ishida, Noboru Iida, Ko Inagaki, Hiroyuki Kawano
  • Publication number: 20240068382
    Abstract: A rotary machine 100 includes a bearing 10, a rotary shaft 20, a turbine wheel 30, a turbine nozzle 31, and a first cavity 40. The bearing 10 has a first end face 10a and a second end face 10b each positioned in the axial direction of the rotary shaft 20. The distance from the first end face 10a to the turbine wheel 30 is shorter than the distance from the second end face 10b to the turbine wheel 30. The first cavity 40 is positioned, in the axial direction of the rotary shaft 20, between a back surface 31b of the turbine nozzle 31 and the second end face 10b of the bearing 10 or between the back surface 31b of the turbine nozzle 31 and a space 11 that the second end face 10b of the bearing 10 faces. The first cavity 40 is present in the zone overlapping with the turbine nozzle 31 in a radial direction of the rotary shaft 20.
    Type: Application
    Filed: January 14, 2022
    Publication date: February 29, 2024
    Inventors: Hidetoshi TAGUCHI, Ko INAGAKI, Masaya HONMA, Takumi HIKICHI
  • Patent number: 11236740
    Abstract: Sealed container (102) houses electric unit (110) equipped with stator (114) and a rotor (116), and compression unit (112) disposed above electric unit (110). Compression unit (112) includes shaft (118) that includes main shaft portion (120) and eccentric shaft portion (122), and cylinder block (124). Compression unit (112) further includes connection portion (136) that connects piston (128) reciprocatively inserted into cylinder (130) and eccentric shaft portion (122), and a thrust bearing that supports a load of shaft (118) in a vertical direction. The thrust bearing includes an upper race in contact with a flange portion of shaft (118), a lower race in contact with a thrust surface of cylinder block (124), and a rolling element. An overall height of sealed container (102) is sized not to exceed a length six times larger than a diameter of piston (128).
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: February 1, 2022
    Assignee: PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
    Inventors: Ko Inagaki, Masanori Kobayashi, Hiroyuki Kawano
  • Publication number: 20210389030
    Abstract: The present invention includes: an electric component; a compression component driven by the electric component; and a sealed container accommodating the electric component and the compression component. The compression component includes: a shaft part rotated by the electric component; and a bearing part slidingly contacting the shaft part. A film having hardness equal to or more than hardness of a sliding surface of the bearing part is provided on a sliding surface of the shaft part. The sliding surface of the bearing part includes a curved-surface portion having an inner diameter that continuously increases, or the sliding surface of the shaft part includes a curved-surface portion having an outer diameter that continuously decreases.
    Type: Application
    Filed: August 27, 2021
    Publication date: December 16, 2021
    Inventors: Yoshinori ISHIDA, Noboru IIDA, Ko INAGAKI, Hiroyuki KAWANO
  • Patent number: 11143442
    Abstract: The present invention includes: an electric component; a compression component driven by the electric component; and a sealed container accommodating the electric component and the compression component. The compression component includes: a shaft part rotated by the electric component; and a bearing part slidingly contacting the shaft part. A film having hardness equal to or more than hardness of a sliding surface of the bearing part is provided on a sliding surface of the shaft part. The sliding surface of the bearing part includes a curved-surface portion having an inner diameter that continuously increases, or the sliding surface of the shaft part includes a curved-surface portion having an outer diameter that continuously decreases.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: October 12, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshinori Ishida, Noboru Iida, Ko Inagaki, Hiroyuki Kawano
  • Patent number: 10961996
    Abstract: A closed compressor includes: a compressor body; and a closed vessel in which the compressor body is accommodated and oil is stored. The compressor body has an electric element and a compression element that is driven by the electric element. The compression element has a cylinder block that forms a cylinder, a piston that performs a reciprocating motion in the cylinder, and a crankshaft that actuates the piston. The cylinder block configures a bearing that pivotally supports the crankshaft. The cylinder forms a compression chamber. The compressor body has a support that forms a curved surface. A contact portion, at which the curved surface comes into contact with a receiving surface in the closed vessel, is formed.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: March 30, 2021
    Assignee: PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
    Inventors: Ko Inagaki, Takahiro Kondou, Yasuhiro Bonkobara
  • Publication number: 20200056604
    Abstract: A refrigerant compressor includes: an electric component (106); a compression component (107) driven by the electric component to compress a refrigerant; and a sealed container (101) accommodating the electric component and the compression component. The compression component includes: a shaft part (109, 110) rotated by the electric component; and a bearing part (114, 119) slidingly contacting the shaft part such that the shaft part is rotatable. A film (160) having hardness equal to or more than hardness of a sliding surface of the bearing part is provided on a sliding surface of the shaft part. Surface roughness of the sliding surface of the bearing part is smaller than surface roughness of the sliding surface of the shaft part.
    Type: Application
    Filed: November 16, 2017
    Publication date: February 20, 2020
    Inventors: Noboru IIDA, Yoshinori ISHIDA, Ko INAGAKI
  • Publication number: 20200056816
    Abstract: The present invention includes: an electric component; a compression component driven by the electric component to compress a refrigerant; and a sealed container accommodating the electric component and the compression component. The compression component includes: a shaft part rotated by the electric component; and a bearing part slidingly contacting the shaft part such that the shaft part is rotatable. A film having hardness equal to or more than hardness of a sliding surface of the bearing part is provided on a sliding surface of the shaft part. The sliding surface of the bearing part includes a curved-surface portion having an inner diameter that continuously increases in a curved shape toward an end of the bearing part in a center axis direction of the bearing part, or the sliding surface of the shaft part includes a curved-surface portion having an outer diameter that continuously decreases in a curved shape toward an end of the shaft part in a center axis direction of the shaft part.
    Type: Application
    Filed: November 16, 2017
    Publication date: February 20, 2020
    Inventors: Yoshinori ISHIDA, Noboru IIDA, Ko INAGAKI, Hiroyuki KAWANO
  • Patent number: 10352312
    Abstract: A hermetic compressor (100) includes an electric element (110), a compression element (112), and a hermetic container (102). The compression element includes a shaft (118), a cylinder block (124), a piston (136), a connection section (144), and an oil supply mechanism (130). The piston has a columnar seal section (160) in sliding contact with an inner peripheral face of the cylinder, two extension sections (162) that have circular arc faces each having the same radius as a radius of the seal section and extend from the seal section to the bottom dead center side in the axial direction with a circumferential gap therebetween, and a columnar capture section (164) that extends further toward the bottom dead center side than the extension section and has a smaller radius than the radius of the seal section.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: July 16, 2019
    Assignee: PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
    Inventors: Ko Inagaki, Masanori Kobayashi, Yu Haraki, Yoshinori Ishida
  • Publication number: 20170268492
    Abstract: A closed compressor includes: a compressor body; and a closed vessel in which the compressor body is accommodated and oil is stored. The compressor body has an electric element and a compression element that is driven by the electric element. The compression element has a cylinder block that forms a cylinder, a piston that performs a reciprocating motion in the cylinder, and a crankshaft that actuates the piston. The cylinder block configures a bearing that pivotally supports the crankshaft. The cylinder forms a compression chamber. The compressor body has a support that forms a curved surface. A contact portion, at which the curved surface comes into contact with a receiving surface in the closed vessel, is formed.
    Type: Application
    Filed: May 27, 2016
    Publication date: September 21, 2017
    Inventors: Ko INAGAKI, Takahiro KONDOU, Yasuhiro BONKOBARA
  • Patent number: 9745973
    Abstract: A hermetic compressor includes a closed vessel for storing lubricating oil, an electric-driving element, and a compressing element driven by the electric-driving element. The compressing element includes a cylinder block forming a compression chamber, a piton that reciprocates inside the compression chamber, and an oiling device for supplying the lubricating oil to an outer circumference of the piston. A first oil groove is concavely formed on the outer circumference of the piston, and a second oil groove is concavely formed on a side opposite to the compression chamber relative to the first oil groove. The second oil groove has a spatial volume same or greater than that of the first oil groove. An expanded clearance portion is provided such that a clearance between the piston and the cylindrical hole portion broadens from a top dead point to a bottom dead point.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: August 29, 2017
    Assignee: PANASONIC CORPORATION
    Inventors: Ko Inagaki, Akira Nakano, Yoshinori Ishida, Ichiro Morita
  • Patent number: 9617986
    Abstract: A hermetic compressor includes: a main bearing (126) which supports a main shaft (120) of a shaft (119); and a thrust ball bearing at an upper end portion of the main bearing (126). A rotor (116) is fixed to the main shaft (120) via a flange. A rotor core (117) has a magnetic center displaced upward relative to the magnetic center of a stator core (115) so that a downward magnetic attractive force is applied between the rotor (116) and the stator (114). Accordingly, a contact load between steel balls and upper and lower races in the thrust ball bearing is appropriately maintained.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: April 11, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Ko Inagaki, Noboru Iida
  • Publication number: 20170009758
    Abstract: A sealed compressor includes sealed container that contains electric element, and compression element driven by electric element. Compression element includes shaft that includes main shaft portion, and eccentric shaft portion integrally movable with main shaft portion, and bearing portion that supports main shaft portion of shaft to constitute a cantilever bearing. Compression element further includes cylinder that compresses gas, piston reciprocatively inserted into cylinder, and connecting rod that connects eccentric shaft portion with piston.
    Type: Application
    Filed: February 13, 2015
    Publication date: January 12, 2017
    Inventors: MASANORI KOBAYASHI, KO INAGAKI
  • Patent number: 9506461
    Abstract: A sealed compressor of the present invention comprises an electric component (110); a compression component (112); a sealed container (102) which accommodates the electric component (110) and the compression component (112) and stores lubricating oil (104) therein; and a suction pipe (170) which is provided to penetrate a wall portion of the sealed container (102), and through which a refrigerant gas suctioned into the sealed container (102) flows; wherein the compression component (112) includes a compression chamber (142) formed within a cylinder (134) and a suction muffler (146) through which the refrigerant gas flows; wherein the suction muffler (146) includes a muffling space (150), an exit pipe (154), an inlet pipe (152), whose suction port (151) opens in a substantially horizontal direction in the interior of the sealed container (102), a funnel-shaped refrigerant receiver section (160) provided to surround the suction port (151); and wherein the suction port (151) is placed such that its center (151A)
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: November 29, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Ko Inagaki, Terumasa Ide
  • Publication number: 20160201661
    Abstract: Sealed container (102) houses electric unit (110) equipped with stator (114) and a rotor (116), and compression unit (112) disposed above electric unit (110). Compression unit (112) includes shaft (118) that includes main shaft portion (120) and eccentric shaft portion (122), and cylinder block (124). Compression unit (112) further includes connection portion (136) that connects piston (128) reciprocatively inserted into cylinder (130) and eccentric shaft portion (122), and a thrust bearing that supports a load of shaft (118) in a vertical direction. The thrust bearing includes an upper race in contact with a flange portion of shaft (118), a lower race in contact with a thrust surface of cylinder block (124), and a rolling element. An overall height of sealed container (102) is sized not to exceed a length six times larger than a diameter of piston (128).
    Type: Application
    Filed: August 27, 2014
    Publication date: July 14, 2016
    Inventors: KO INAGAKI, MASANORI KOBAYASHI, HIROYUKI KAWANO
  • Publication number: 20150354552
    Abstract: A hermetic compressor (100) includes an electric element (110), a compression element (112), and a hermetic container (102). The compression element includes a shaft (118), a cylinder block (124), a piston (136), a connection section (144), and an oil supply mechanism (130). The piston has a columnar seal section (160) in sliding contact with an inner peripheral face of the cylinder, two extension sections (162) that have circular arc faces each having the same radius as a radius of the seal section and extend from the seal section to the bottom dead center side in the axial direction with a circumferential gap therebetween, and a columnar capture section (164) that extends further toward the bottom dead center side than the extension section and has a smaller radius than the radius of the seal section.
    Type: Application
    Filed: January 20, 2014
    Publication date: December 10, 2015
    Inventors: Ko INAGAKI, Masanori KOBAYASHI, Yu HARAKI, Yoshinori ISHIDA
  • Publication number: 20150159640
    Abstract: A hermetic compressor includes: a main bearing (126) which supports a main shaft (120) of a shaft (119); and a thrust ball bearing at an upper end portion of the main bearing (126). A rotor (116) is fixed to the main shaft (120) via a flange. A rotor core (117) has a magnetic center displaced upward relative to the magnetic center of a stator core (115) so that a downward magnetic attractive force is applied between the rotor (116) and the stator (114). Accordingly, a contact load between steel balls and upper and lower races in the thrust ball bearing is appropriately maintained.
    Type: Application
    Filed: June 11, 2013
    Publication date: June 11, 2015
    Inventors: Ko Inagaki, Noboru Iida
  • Patent number: 9021937
    Abstract: Provided is a reciprocating compressor having a structure in which friction losses between a shaft and a bearing can be reduced without impairing the ability of the bearing to support the shaft. A reciprocating compressor (100) includes a cylinder (5), a piston (4), a connecting rod (6), a shaft (1), and a bearing (2). The shaft (1) has a journal portion (28) as a portion covered by the bearing (2). The journal portion (28) has a first journal portion (7) located closer to the connecting rod (6) with respect to a midpoint M of the journal portion (28) in a direction parallel to a rotational axis and a second journal portion (8) located farther from the connecting rod (6) with respect to the midpoint M. The bearing (2) has a first sliding portion (10) for supporting the first journal portion (7) and a second sliding portion (11) for supporting the second journal portion (8).
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: May 5, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yoko Sugamoto, Masaru Matsui, Fuminori Sakima, Ko Inagaki, Akira Nakano
  • Publication number: 20140341763
    Abstract: A sealed compressor (100) comprises an electric component (110), a compression component (112), and a sealed container (102), the compression component includes a shaft (118), a cylinder block (124), a piston (130), and a ball bearing (176), the ball bearing includes a cage (168), a plurality of rolling elements (166); a first race (164), a second race (170), and a support member (172), and when a mass of a shaft assembly (118a) including the rotor (116) and the shaft is M, a spring constant of the support member is K, and a maximum rotational frequency of the shaft assembly is F, a relationship of F<1/4?)*(K/M)?0.5 is satisfied.
    Type: Application
    Filed: December 26, 2012
    Publication date: November 20, 2014
    Inventors: Masanori Kobayashi, Ko Inagaki, Terumasa Ide