Patents by Inventor Genta Yoshikawa

Genta Yoshikawa 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: 11939977
    Abstract: A scroll compressor comprising a fixed scroll (15); an orbiting scroll (16) supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls (15, 16) is discharged; an end plate step portion (16E) provided on an end plate of the orbiting scroll (16) formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (15E) provided on a wall portion of the fixed scroll (15) that corresponds to the end plate step portion (16E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll (16) is treated for surface hardening and the fixed scroll (15) is not treated for surface hardening.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: March 26, 2024
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Makoto Takeuchi, Genta Yoshikawa, Kazuhide Watanabe, Katsuhiro Fujita, Takayuki Hagita, Takayuki Kuwahara
  • Publication number: 20220220960
    Abstract: A scroll compressor with a stationary scroll, an orbiting scroll, and a discharge port through which a fluid that has been compressed by both the scrolls is discharged. An end plate of the orbiting scroll is provided with an end-plate side stepped portion formed such that, along a spiral of a spiral wrap, the height thereof increases toward a central side of the spiral and decreases toward an outer end side thereof. A spiral wrap of the stationary scroll is provided with a wall-portion side stepped portion formed corresponding to the end-plate side stepped portion such that the height thereof decreases toward the central side of the spiral and increases toward the outer end side thereof. A pair of compression chambers which face each other, the ventral side compression chamber communicates with the discharge port before the dorsal side compression chamber communicates with the discharge port.
    Type: Application
    Filed: March 31, 2022
    Publication date: July 14, 2022
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime SATO, Takuma YAMASHITA, Makoto TAKEUCHI, Genta YOSHIKAWA, Akihiro KANAI, Kazuhide WATANABE
  • Patent number: 11326602
    Abstract: A scroll compressor with a stationary scroll, an orbiting scroll, and a discharge port through which a fluid that has been compressed by both the scrolls is discharged. An end plate of the orbiting scroll is provided with an end-plate side stepped portion formed such that, along a spiral of a spiral wrap, the height thereof increases toward a central side of the spiral and decreases toward an outer end side thereof. A spiral wrap of the stationary scroll is provided with a wall-portion side stepped portion formed corresponding to the end-plate side stepped portion such that the height thereof decreases toward the central side of the spiral and increases toward the outer end side thereof. A pair of compression chambers which face each other, the ventral side compression chamber communicates with the discharge port before the dorsal side compression chamber communicates with the discharge port.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: May 10, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Takuma Yamashita, Makoto Takeuchi, Genta Yoshikawa, Akihiro Kanai, Kazuhide Watanabe
  • Patent number: 11092155
    Abstract: A scroll compressor comprising a fixed scroll (15); an orbiting scroll (16) supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls (15, 16) is discharged; an end plate step portion (16E) provided on an end plate of the orbiting scroll (16) formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (15E) provided on a wall portion of the fixed scroll (15) that corresponds to the end plate step portion (16E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll (16) is treated for surface hardening and the fixed scroll (15) is not treated for surface hardening.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: August 17, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Makoto Takeuchi, Genta Yoshikawa, Kazuhide Watanabe, Katsuhiro Fujita, Takayuki Hagita, Takayuki Kuwahara
  • Publication number: 20210148361
    Abstract: A scroll compressor comprising a fixed scroll (15); an orbiting scroll (16) supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls (15, 16) is discharged; an end plate step portion (16E) provided on an end plate of the orbiting scroll (16) formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (15E) provided on a wall portion of the fixed scroll (15) that corresponds to the end plate step portion (16E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll (16) is treated for surface hardening and the fixed scroll (15) is not treated for surface hardening.
    Type: Application
    Filed: January 27, 2021
    Publication date: May 20, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime SATO, Makoto TAKEUCHI, Genta YOSHIKAWA, Kazuhide WATANABE, Katsuhiro FUJITA, Takayuki HAGITA, Takayuki KUWAHARA
  • Patent number: 10844719
    Abstract: One of a pair of a fixed scroll and an orbiting scroll is the scroll including a step portion provided only at a predetermined position along a spiral direction on a blade bottom surface of a spiral wrap, and the other one of the scrolls is the scroll including a step portion provided only at a predetermined position along a spiral direction on a blade tip surface of a spiral wrap. A blade bottom surface of an end plate of the fixed scroll is set as a reference surface for setting a chip gap between both the scrolls. When a wrap height of the spiral wrap of the orbiting scroll is represented by (L) (Lo, Li) and a wrap height of the spiral wrap of the fixed scroll is represented by (lo, li), L (Lo, Li)>1 (lo, li) is satisfied.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: November 24, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Takeuchi, Genta Yoshikawa, Hajime Sato, Takuma Yamashita, Takayuki Hagita, Takayuki Kuwahara, Katsuhiro Fujita, Kazuhide Watanabe
  • Patent number: 10634140
    Abstract: In a scroll compressor that forms two suction volume parts by engaging paired fixed scroll and turning scroll with each other while scroll laps respectively erected on end plates of the fixed scroll and the turning scroll are opposed to each other and driving the turning scroll to revolve around the fixed scroll, out of the two suction volume parts, one of the suction volume parts that is formed close to a suction port provided in a housing is made larger than the other suction volume part.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Takayuki Kuwahara, Katsuhiro Fujita, Takayuki Hagita, Makoto Takeuchi, Hajime Sato, Genta Yoshikawa
  • Publication number: 20180058451
    Abstract: A scroll fluid machine includes a pair of a fixed scroll (15) and an orbiting scroll (16). The scroll fluid machine has an one-side stepped scroll structure in which a stepped part (16E) is provided only at a predetermined position on a tooth bottom surface (16D) of a involute spiral wrap (16B) of one of the fixed scroll (15) and the orbiting scroll (16) in a spiral direction, and a stepped part (15E) corresponding to the stepped part (16E) on the tooth bottom surface (16D) is provided only at a predetermined position on a tooth top surface (15C) of a involute spiral wrap (15B) of the other scroll in a spiral direction. The stepped part (16E) on the tooth bottom surface (16D) is provided at a position on an inner side of a spiral end position (16F) of the involute spiral wrap (16B) at intake closure by an involute angle of n radians in the spiral direction or at a position on an outer side of the inner-side position.
    Type: Application
    Filed: February 23, 2016
    Publication date: March 1, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Takayuki HAGITA, Takayuki KUWAHARA, Katsuhiro FUJITA, Makoto TAKEUCHI, Genta YOSHIKAWA, Hiroshi YAMAZAKI, Keita KITAGUCHI, Hajime SATO
  • Publication number: 20180045199
    Abstract: In a scroll compressor that forms two suction volume parts by engaging paired fixed scroll and turning scroll with each other while scroll laps respectively erected on end plates of the fixed scroll and the turning scroll are opposed to each other and driving the turning scroll to revolve around the fixed scroll, out of the two suction volume parts, one of the suction volume parts that is formed close to a suction port provided in a housing is made larger than the other suction volume part.
    Type: Application
    Filed: February 19, 2016
    Publication date: February 15, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Takayuki KUWAHARA, Katsuhiro FUJITA, Takayuki HAGITA, Makoto TAKEUCHI, Hajime SATO, Genta YOSHIKAWA
  • Publication number: 20180038368
    Abstract: A scroll compressor comprising a fixed scroll (15); an orbiting scroll (16) supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls (15, 16) is discharged; an end plate step portion (16E) provided on an end plate of the orbiting scroll (16) formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (15E) provided on a wall portion of the fixed scroll (15) that corresponds to the end plate step portion (16E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll (16) is treated for surface hardening and the fixed scroll (15) is not treated for surface hardening.
    Type: Application
    Filed: March 8, 2016
    Publication date: February 8, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Hajime SATO, Makoto TAKEUCHI, Genta YOSHIKAWA, Kazuhide WATANABE, Katsuhiro FUJITA, Takayuki HAGITA, Takayuki KUWAHARA
  • Publication number: 20180038367
    Abstract: A scroll compressor is provided with a stationary scroll, an orbiting scroll, and a discharge port (18) through which a fluid that has been compressed by both the scrolls is discharged. An end plate of the orbiting scroll is provided with an end-plate side stepped portion formed in such a way that, along a spiral of a spiral wrap (16B), the height thereof increases toward a central side of the spiral and decreases toward an outer end side thereof. A spiral wrap (15B) of the stationary scroll is provided with a wall-portion side stepped portion formed corresponding to the end-plate side stepped portion in such a way that the height thereof decreases toward the central side of the spiral and increases toward the outer end side thereof.
    Type: Application
    Filed: March 16, 2016
    Publication date: February 8, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Hajime SATO, Takuma YAMASHITA, Makoto TAKEUCHI, Genta YOSHIKAWA, Akihiro KANAI, Kazuhide WATANABE
  • Publication number: 20170370219
    Abstract: One of a pair of a fixed scroll and an orbiting scroll is the scroll including a step portion provided only at a predetermined position along a spiral direction on a blade bottom surface of a spiral wrap, and the other one of the scrolls is the scroll including a step portion provided only at a predetermined position along a spiral direction on a blade tip surface of a spiral wrap. A blade bottom surface of an end plate of the fixed scroll is set as a reference surface for setting a chip gap between both the scrolls. When a wrap height of the spiral wrap of the orbiting scroll is represented by (L) (Lo, Li) and a wrap height of the spiral wrap of the fixed scroll is represented by (lo, li), L (Lo, Li)>1 (lo, li) is satisfied.
    Type: Application
    Filed: January 22, 2016
    Publication date: December 28, 2017
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto TAKEUCHI, Genta YOSHIKAWA, Hajime SATO, Takuma YAMASHITA, Takayuki HAGITA, Takayuki KUWAHARA, Katsuhiro FUJITA, Kazuhide WATANABE
  • Publication number: 20130243635
    Abstract: Provided is a scroll-type fluid machine which can reduce deformation of a rotary scroll caused when fixing a bearing into a boss part. A scroll compressor, in which a sealed chamber confining a fluid is formed by a fixed scroll and the rotary scroll meshed together, each of the scrolls having a spiral wall erected on one side face of an end plate, includes: a metallic boss part (15C) protruding from the other side face of the end plate of the rotary scroll; a metallic rotary bearing (12) inserted into the boss part (15C); a crankshaft rotating around an axis and including a bush part inserted in the rotary bearing (12) and rotatably supported by the rotary bearing (12); and an insert member (31) disposed between the boss part (15C) and the rotary bearing (12) and having a thermal expansion coefficient greater than those of the boss part (15C) and the rotary bearing (12).
    Type: Application
    Filed: April 26, 2012
    Publication date: September 19, 2013
    Applicant: Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.
    Inventors: Kazuhide Watanabe, Hiroshi Yamazaki, Genta Yoshikawa, Takafumi Yoshida, Shiki Matsuo