Patents by Inventor Akihiko Morikawa

Akihiko Morikawa 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: 20210190087
    Abstract: An impeller includes: a disk having a first disk member that has a tubular shape centered on an axis, and a second disk member that has a tubular shape centered on the axis and is arranged on a first side of the first disk member in a direction of the axis; a blade that is formed integrally with the second disk member; and a cover that forms a flow passage between the cover and the second disk member by covering the blade from an outer peripheral side. A recessed portion, which is recessed from the first side toward a second side in the direction of the axis, is formed in an annular-shape around the axis in the first disk member.
    Type: Application
    Filed: November 12, 2018
    Publication date: June 24, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Toshifumi Kanno, Nobuyori Yagi, Akihiko Morikawa
  • Patent number: 10982548
    Abstract: An impeller includes a disk that has tubular first and second disk members, a blade that is integrally provided with the second disk member, and a cover that is integrally provided with the blade and covers the blade. The first disk member has a ring-shaped recessed portion therein. The second disk member has a ring-shaped engaging portion that is configured to engage with the first disk member by being inserted into the recessed portion. A first shrink-fitting portion is provided in a boundary portion between an outer circumferential surface of the engaging portion and an inner circumferential surface of the recessed portion that comes into contact with the outer circumferential surface.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: April 20, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Nobuyori Yagi, Akihiko Morikawa, Shinichiro Tokuyama, Hiroki Takagi, Kenji Itagaki
  • Patent number: 10821520
    Abstract: A production method for an impeller includes: an impeller molding body forming step of forming an impeller molding body in which a reinforcement portion which reinforces at least one of end portions of the impeller in which an inlet and an outlet of a flow path are formed and the impeller are integrated with each other, by an additive manufacturing method using a metal powder; and a removal step of removing the reinforcement portion from the impeller molding body.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: November 3, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Kosei Kawahara, Akihiko Morikawa
  • Publication number: 20200339768
    Abstract: Provided is a composition for a fiber-reinforced resin, for producing a fiber-reinforced resin capable of providing a formed article excellent in mechanical strength (e.g., impact resistance and flexural strength). The composition for a fiber-reinforced resin includes a block polymer (A), and a polymer (B) including at least one functional group selected from the group consisting of an epoxy group, an oxazoline group, and an acid anhydride structure.
    Type: Application
    Filed: November 14, 2017
    Publication date: October 29, 2020
    Applicant: JSR CORPORATION
    Inventors: Rikimaru KUWABARA, Akihiko MORIKAWA, Shuugo MAEDA
  • Publication number: 20190388972
    Abstract: A production method for an impeller includes: an impeller molding body forming step of forming an impeller molding body in which a reinforcement portion which reinforces at least one of end portions of the impeller in which an inlet and an outlet of a flow path are formed and the impeller are integrated with each other, by an additive manufacturing method using a metal powder; and a removal step of removing the reinforcement portion from the impeller molding body.
    Type: Application
    Filed: February 24, 2017
    Publication date: December 26, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Kosei Kawahara, Akihiko Morikawa
  • Publication number: 20190376391
    Abstract: An impeller includes a disk that has tubular first and second disk members, a blade that is integrally provided with the second disk member, and a cover that is integrally provided with the blade and covers the blade. The first disk member has a ring-shaped recessed portion therein. The second disk member has a ring-shaped engaging portion that is configured to engage with the first disk member by being inserted into the recessed portion. A first shrink-fitting portion is provided in a boundary portion between an outer circumferential surface of the engaging portion and an inner circumferential surface of the recessed portion that comes into contact with the outer circumferential surface.
    Type: Application
    Filed: February 20, 2017
    Publication date: December 12, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Nobuyori Yagi, Akihiko Morikawa, Shinichiro Tokuyama, Hiroki Takagi, Kenji Itagaki
  • Publication number: 20190376526
    Abstract: An impeller manufacturing method includes: integrally forming an impeller by an additive manufacturing method using a metal powder, the impeller including a disk which has a disk shape about an axis, a plurality of blades which are formed on a surface facing a first side in an axial direction of the disk with gaps therebetween in a circumferential direction about the axis, and a cover which covers the plurality of blades from the first side in the axial direction; processing the integrally formed impeller by a hot isostatic pressing; and causing a polishing fluid containing abrasive grains to flow through a flow path formed between the disk, the cover, and the blades in the impeller after the processing with the hot isostatic pressing and while pressurizing the polishing fluid to perform fluid polishing.
    Type: Application
    Filed: February 24, 2017
    Publication date: December 12, 2019
    Applicant: Mitsubishi Heavy Industries Compressor Corporation
    Inventors: Akihiko MORIKAWA, Kosei KAWAHARA, Toyoaki YASUI
  • Patent number: 10174453
    Abstract: A composition improves mechanical strength (e.g., impact resistance and flexural strength), and achieves improved mass productivity by reducing a situation in which a strand fuzzes during extrusion. The composition includes a conjugated diene-based polymer (A), fibers (B), and a thermoplastic resin (C), the composition including the conjugated diene-based polymer (A) in a ratio of 0.05 to 30 parts by mass based on 100 parts by mass of the thermoplastic resin (C), and including the fibers (B) in a ratio of 3 to 150 parts by mass based on 100 parts by mass of the thermoplastic resin (C), wherein the conjugated diene-based polymer (A) includes at least one functional group selected from the group consisting of an alkoxysilyl group and an amino group.
    Type: Grant
    Filed: July 3, 2015
    Date of Patent: January 8, 2019
    Assignee: JSR CORPORATION
    Inventors: Shuugo Maeda, Akihiko Morikawa, Kentarou Kanae, Teruo Aoyama, Jirou Ueda, Masahiro Shibata, Akihiko Ookubo
  • Patent number: 10075036
    Abstract: The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft<the diameter of the convex portion<the diameter of ridge-shaped convex portions of the shaft<the diameter of the concave portion.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 11, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akihiko Morikawa, Kazuhisa Takashima, Toshihiro Matsunaga, Masayuki Miyaoka, Akihiro Yamamura, Hiroki Maeda
  • Patent number: 9866008
    Abstract: A safety unit is provided for this purpose, and includes a position determining unit, a speed determining unit, a logical product unit, and a stopping unit. When a rotation amount (positional data) of an encoder rotating in connection with a rotation shaft of a servo motor falls within a predetermined limiting range, the position determining unit outputs a command for stopping a motor to a logical product unit. When rotation speed of the encoder rotating in connection with the rotation shaft of the servo motor falls within a predetermined limiting range, the speed determining unit outputs the command for stopping the motor to the logical product unit. This control by the logical product unit requires a stop command from both the position and speed determining units. The logical product unit informs the stopping unit to stop the servo motor to a controller.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 9, 2018
    Assignee: OMRON Corporation
    Inventors: Akihiko Morikawa, Takao Ushiyama, Junichi Ueno, Toshinori Sato
  • Publication number: 20170211225
    Abstract: A composition improves mechanical strength (e.g., impact resistance and flexural strength), and achieves improved mass productivity by reducing a situation in which a strand fuzzes during extrusion. The composition includes a conjugated diene-based polymer (A), fibers (B), and a thermoplastic resin (C), the composition including the conjugated diene-based polymer (A) in a ratio of 0.05 to 30 parts by mass based on 100 parts by mass of the thermoplastic resin (C), and including the fibers (B) in a ratio of 3 to 150 parts by mass based on 100 parts by mass of the thermoplastic resin (C), wherein the conjugated diene-based polymer (A) includes at least one functional group selected from the group consisting of an alkoxysilyl group and an amino group.
    Type: Application
    Filed: July 3, 2015
    Publication date: July 27, 2017
    Applicant: JSR CORPORATION
    Inventors: Shuugo MAEDA, Akihiko MORIKAWA, Kentarou KANAE, Teruo AOYAMA, Jiru UEDA, Masahiro SHIBATA, Akihiko OOKUBO
  • Patent number: 9547305
    Abstract: The operation state of a servo motor is monitored and output to a user before automatic termination of power to the motor. A servo system includes a servo motor and a safety unit. The safety unit cuts off electric power to the servo motor when at least one of a speed, a position, acceleration, an amount of movement, a movement direction, and torque of the servo motor is outside a first operation range. Furthermore, the safety unit outputs a warning when at least one of the speed, the position, the acceleration, the amount of movement, the movement direction, the torque is within the first operation range, but is outside a second operation range that is narrower than the first operation range. User controls allow reduced operation when outside the second operation range.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 17, 2017
    Assignee: OMRON Corporation
    Inventors: Takao Ushiyama, Akihiko Morikawa, Toshinori Sato, Junichi Ueno
  • Patent number: 8969789
    Abstract: A signal output unit generates an A phase output signal of a rectangular wave and a B phase output signal of a rectangular wave from the A phase sinusoidal wave signal and the B phase sinusoidal wave signal, respectively and outputs the generated signals. An internal signal generating unit (comparator) generates an A phase internal signal of a rectangular wave and a B phase internal signal of a rectangular wave from the A phase sinusoidal wave signal and the B phase sinusoidal wave signal, respectively, which are further processed by counters, and an abnormality detector. Each counter resets in response to a pulse edge of a signal for detection. The abnormality detector detects an abnormality when the count value of at least one of counters reaches a prescribed value.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: March 3, 2015
    Assignee: OMRON Corporation
    Inventors: Toshinori Sato, Akihiko Morikawa, Takao Ushiyama, Junichi Ueno
  • Publication number: 20140265699
    Abstract: The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft<the diameter of the convex portion<the diameter of ridge-shaped convex portions of the shaft<the diameter of the concave portion.
    Type: Application
    Filed: September 20, 2012
    Publication date: September 18, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akihiko Morikawa, Kazuhisa Takashima, Toshihiro Matsunaga, Masayuki Miyaoka, Akihiro Yamamura, Hiroki Maeda
  • Publication number: 20140018958
    Abstract: One aspect of the present invention provides a new safety system that can perform measurement in order to clearly set a realistic determination value and a control device constituting the safety system. The safety system, which causes a target device to transition to a safety state when an event matched with a predetermined safety condition is generated, is provided. The safety system includes a control device that includes a monitoring function of continuously collecting information on the safety condition and a management device that aggregates the information on the safety condition, which is collected by the control device. In response to generation of the event matched with the safety condition, the control device stores the information on the safety condition for a predetermined period based on generation timing of the event while correlating the generation timing with the collected information.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 16, 2014
    Inventors: Jyunichi UENO, Toshinori SATO, Akihiko MORIKAWA, Takao USHIYAMA
  • Publication number: 20130240719
    Abstract: A signal output unit generates an A phase output signal of a rectangular wave and a B phase output signal of a rectangular wave from the A phase sinusoidal wave signal and the B phase sinusoidal wave signal, respectively and outputs the generated signals. An internal signal generating unit (comparator) generates an A phase internal signal of a rectangular wave and a B phase internal signal of a rectangular wave from the A phase sinusoidal wave signal and the B phase sinusoidal wave signal, respectively, which are further processed by counters, and an abnormality detector. Each counter resets in response to a pulse edge of a signal for detection. The abnormality detector detects an abnormality when the count value of at least one of counters reaches a prescribed value.
    Type: Application
    Filed: February 26, 2013
    Publication date: September 19, 2013
    Applicant: OMRON CORPORATION
    Inventors: Toshinori SATO, Akihiko MORIKAWA, Takao USHIYAMA, Junichi UENO
  • Publication number: 20130241460
    Abstract: The operation state of a servo motor is monitored and output to a user before automatic termination of power to the motor. A servo system includes a servo motor and a safety unit. The safety unit cuts off electric power to the servo motor when at least one of a speed, a position, acceleration, an amount of movement, a movement direction, and torque of the servo motor is outside a first operation range. Furthermore, the safety unit outputs a warning when at least one of the speed, the position, the acceleration, the amount of movement, the movement direction, the torque is within the first operation range, but is outside a second operation range that is narrower than the first operation range. User controls allow reduced operation when outside the second operation range.
    Type: Application
    Filed: February 26, 2013
    Publication date: September 19, 2013
    Applicant: OMRON Corporation
    Inventors: Takao Ushiyama, Akihiko Morikawa, Toshinori Sato, Junichi Ueno
  • Publication number: 20130241316
    Abstract: A safety unit is provided for this purpose, and includes a position determining unit, a speed determining unit, a logical product unit, and a stopping unit. When a rotation amount (positional data) of an encoder rotating in connection with a rotation shaft of a servo motor falls within a predetermined limiting range, the position determining unit outputs a command for stopping a motor to a logical product unit. When rotation speed of the encoder rotating in connection with the rotation shaft of the servo motor falls within a predetermined limiting range, the speed determining unit outputs the command for stopping the motor to the logical product unit. This control by the logical product unit requires a stop command from both the position and speed determining units. The logical product unit informs the stopping unit to stop the servo motor to a controller.
    Type: Application
    Filed: February 26, 2013
    Publication date: September 19, 2013
    Applicant: OMRON CORPORATION
    Inventors: Akihiko MORIKAWA, Takao USHIYAMA, Junichi UENO, Toshinori SATO
  • Patent number: 7909130
    Abstract: A drive control unit alone can be replaced without detaching an electric power steering apparatus from a gear housing. A motor housing of an electric motor, which outputs assist torque to a steering wheel of a vehicle, and a drive housing of the drive control unit, which controls the driving of the electric motor, are coupled to each other at a mating surface in a surface to surface contact manner, and the drive housing and the gear housing are coupled with each other on the same axis. A location of connection, at which a power supply input terminal block of the electric motor and power supply bus bars of the drive control unit are connected to each other by us of screws, is arranged at a joint location at which the motor housing and the drive housing are joined to each other by screws.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: March 22, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akihiko Morikawa, Yoshihito Asao, Tadayuki Fujimoto
  • Patent number: 7867416
    Abstract: The thermoplastic elastomer composition of the present invention comprises a thermoplastic elastomer which includes an ethylene•?-olefin copolymer and a crystalline polyethylene resin, wherein the crystalline polyethylene resin constitutes a three-dimensional network structure in a matrix formed by the ethylene•?-olefin copolymer, an organic or inorganic blowing agent and a nucleating agent, wherein the thermoplastic elastomer has a melt flow rate of 5 g/10 min or more at a temperature of 230° C. and a load of 10 kg, and a melt tension of 3.0 gf or more at a temperature of 210° C. and a pulling rate of 2 m/min. Also the foam injection molding method of the present invention is a method including injecting the above-mentioned composition into a cavity space of a metal mold and then expanding the cavity space to foam by opening the metal mold at a mold opening rate of 0.05 to 0.4 mm/sec.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: January 11, 2011
    Assignees: Honda Motor Co., Ltd., JSR Corporation
    Inventors: Tomokazu Abe, Katumasa Ieda, Akihiko Morikawa, Kentarou Kanae