Patents by Inventor Mamoru Murakami

Mamoru Murakami 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: 11479118
    Abstract: The invention includes first and second motors, first and second differential mechanisms, and first to eighth decoupling mechanisms. The first and second motors transmit power to left and right wheels. First differential mechanisms distribute the power from the first and second motors. The first and second mechanisms are interposed between the first differential mechanism and the left front wheel and between the differential mechanism and the left rear wheel. The third and fourth decoupling mechanisms are interposed between the first motor and the first decoupling mechanism and between the first motor and the second decoupling mechanism. The fifth and sixth decoupling mechanisms are interposed between the second differential mechanism and the right front wheel and the right rear wheel, respectively. The seventh and eighth decoupling mechanisms are interposed between the second motor and the fifth decoupling mechanism and between the second motor and the sixth decoupling mechanism.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: October 25, 2022
    Assignee: SUBARU CORPORATION
    Inventors: Naohiro Imamura, Takahito Inoh, Koki Mitsumoto, Mamoru Murakami
  • Patent number: 11448299
    Abstract: A drive apparatus for an electric-motor four-wheel drive vehicle includes first and second motors, first and second differential mechanisms, and a propeller shaft. The vehicle includes a first wheel pair including first left and right wheels and a second wheel pair including second left and right wheels and positioned on opposite side to the first wheel pair in a front-rear direction. The first and second motors are configured to output first output torque and second output torque, respectively. The first differential mechanism is configured to distribute the first output torque to a first torque-transmitting member coupled to the first left wheel and a third torque-transmitting member coupled to the propeller shaft. The second differential mechanism is configured to distribute the second output torque to the third torque-transmitting member and a second torque-transmitting member coupled to the first right wheel.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: September 20, 2022
    Assignee: SUBARU CORPORATION
    Inventors: Mamoru Murakami, Naohiro Imamura, Takahito Inoh, Koki Mitsumoto
  • Patent number: 11433766
    Abstract: A driving device of an electric-motor four-wheel drive vehicle includes a propeller shaft, a first differential mechanism, a second differential mechanism, a first decoupling mechanism, a second decoupling mechanism, a first motor, and a second motor. The propeller shaft transmits power between front wheels and rear wheels. The first differential mechanism is disposed in a drive shaft of the front wheels. The second differential mechanism is disposed in a drive shaft of the rear wheels. The first decoupling mechanism decouples the first differential mechanism from the propeller shaft. The second decoupling mechanism decouples the second differential mechanism from the propeller shaft. The first motor is coupled to the propeller shaft via a part closer to the front wheels than the first decoupling mechanism or a part closer to the rear wheels than the second decoupling mechanism. The second motor is coupled between the first and second decoupling mechanisms.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: September 6, 2022
    Assignee: SUBARU CORPORATION
    Inventors: Mamoru Murakami, Naohiro Imamura, Takahito Inoh, Koki Mitsumoto
  • Patent number: 11273706
    Abstract: A drive device includes a first clutch mechanism that couples or decouples power transmission systems for front and rear wheels, a first electric motor disposed on a front or rear wheel side and coupled to the first clutch mechanism, a second electric motor disposed on the other of the front and rear wheel sides and coupled to the first clutch mechanism, a second clutch mechanism that couples or decouples the first electric motor and front drive shafts, a planetary gear mechanism that distributes output of the first electric motor to the first and second clutch mechanisms, and a third clutch mechanism that limits a difference between a first rotational element that transmits the output of the first electric motor to the first clutch mechanism and a second rotational element that transmits the output of the first electric motor to the second clutch mechanism.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: March 15, 2022
    Assignee: SUBARU CORPORATION
    Inventors: Takahito Inoh, Naohiro Imamura, Mamoru Murakami, Koki Mitsumoto
  • Patent number: 11268621
    Abstract: A hydraulic control apparatus includes an output-side oil passage into which oil from a first oil passage and oil from a second oil passage flow, and a pressure regulating check valve regulating a hydraulic pressure in the second oil passage. The pressure regulating check valve includes first and second elastic portions housed in a spool hole between a valve body and a bottom of the spool hole. A natural length of the second elastic portion is shorter than a distance between the valve body and the bottom when the valve body closes an inflow hole. The second elastic portion applies an elastic force to the valve body in a state in which the valve body opens the inflow hole.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: March 8, 2022
    Assignees: NIDEC TOSOK CORPORATION, SUBARU CORPORATION
    Inventors: Kunio Kimpara, Masayuki Nojo, Mamoru Murakami, Hiroaki Kosugi
  • Publication number: 20210086611
    Abstract: A drive device includes a first clutch mechanism that couples or decouples power transmission systems for front and rear wheels, a first electric motor disposed on a front or rear wheel side and coupled to the first clutch mechanism, a second electric motor disposed on the other of the front and rear wheel sides and coupled to the first clutch mechanism, a second clutch mechanism that couples or decouples the first electric motor and front drive shafts, a planetary gear mechanism that distributes output of the first electric motor to the first and second clutch mechanisms, and a third clutch mechanism that limits, in the planetary gear mechanism, a difference between a first rotational element that transmits the output of the first electric motor to the first clutch mechanism and a second rotational element that transmits the output of the first electric motor to the second clutch mechanism.
    Type: Application
    Filed: August 17, 2020
    Publication date: March 25, 2021
    Applicant: SUBARU CORPORATION
    Inventors: Takahito INOH, Naohiro IMAMURA, Mamoru MURAKAMI, Koki MITSUMOTO
  • Publication number: 20210086612
    Abstract: The invention includes first and second motors, first and second differential mechanisms, and first to eighth decoupling mechanisms. The first and second motors transmit power to left and right wheels. First differential mechanisms distribute the power from the first and second motors. The first and second mechanisms are interposed between the first differential mechanism and the left front wheel and between the differential mechanism and the left rear wheel. The third and fourth decoupling mechanisms are interposed between the first motor and the first decoupling mechanism and between the first motor and the second decoupling mechanism. The fifth and sixth decoupling mechanisms are interposed between the second differential mechanism and the right front wheel and the right rear wheel, respectively. The seventh and eighth decoupling mechanisms are interposed between the second motor and the fifth decoupling mechanism and between the second motor and the sixth decoupling mechanism.
    Type: Application
    Filed: August 20, 2020
    Publication date: March 25, 2021
    Applicant: SUBARU CORPORATION
    Inventors: Naohiro IMAMURA, Takahito INOH, Koki MITSUMOTO, Mamoru MURAKAMI
  • Publication number: 20210033182
    Abstract: A drive apparatus for an electric-motor four-wheel drive vehicle includes first and second motors, first and second differential mechanisms, and a propeller shaft. The vehicle includes a first wheel pair including first left and right wheels and a second wheel pair including second left and right wheels and positioned on opposite side to the first wheel pair in a front-rear direction. The first and second motors are configured to output first output torque and second output torque, respectively. The first differential mechanism is configured to distribute the first output torque to a first torque-transmitting member coupled to the first left wheel and a third torque-transmitting member coupled to the propeller shaft. The second differential mechanism is configured to distribute the second output torque to the third torque-transmitting member and a second torque-transmitting member coupled to the first right wheel.
    Type: Application
    Filed: June 15, 2020
    Publication date: February 4, 2021
    Applicant: SUBARU CORPORATION
    Inventors: Mamoru MURAKAMI, Naohiro IMAMURA, Takahito INOH, Koki MITSUMOTO
  • Publication number: 20210031622
    Abstract: A driving device of an electric-motor four-wheel drive vehicle includes a propeller shaft, a first differential mechanism, a second differential mechanism, a first decoupling mechanism, a second decoupling mechanism, a first motor, and a second motor. The propeller shaft transmits power between front wheels and rear wheels. The first differential mechanism is disposed in a drive shaft of the front wheels. The second differential mechanism is disposed in a drive shaft of the rear wheels. The first decoupling mechanism decouples the first differential mechanism from the propeller shaft. The second decoupling mechanism decouples the second differential mechanism from the propeller shaft. The first motor is coupled to the propeller shaft via a part closer to the front wheels than the first decoupling mechanism or a part closer to the rear wheels than the second decoupling mechanism. The second motor is coupled between the first and second decoupling mechanisms.
    Type: Application
    Filed: July 7, 2020
    Publication date: February 4, 2021
    Applicant: SUBARU CORPORATION
    Inventors: Mamoru MURAKAMI, Naohiro IMAMURA, Takahito INOH, Koki MITSUMOTO
  • Patent number: 10907732
    Abstract: A shift control device includes a hydraulic circuit and a control unit. The hydraulic circuit is provided with multiple actuation valves. The control unit is configured to switch positions or states of each of the multiple actuation valves in accordance with a shift position command by a shift operation device. The hydraulic circuit is configured to couples a hydraulic oil supply source to one of travel actuators in an automatic transmission in multiple circuit states where the position or the state of at least one of the multiple actuation valves differs.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: February 2, 2021
    Assignee: SUBARU CORPORATION
    Inventors: Daisuke Kidachi, Mamoru Murakami, Taichi Tsuji
  • Patent number: 10704679
    Abstract: In a hydraulic control device, a first valve device is brought into an open state when a first value obtained by subtracting a value of a pressure in the first output side oil passage from a value of a pressure in the second output side oil passage is equal to or larger than a first threshold value. A second valve device is brought into an open state when an oil pressure in a third connection oil passage is equal to or larger than a second threshold value, and is brought into a closed state when the oil pressure in the third connection oil passage is smaller than the second threshold value. The first value is equal to or larger than the first threshold value and the first valve device is in the open state when the second valve device is in the closed state.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: July 7, 2020
    Assignees: SUBARU CORPORATION, NIDEC TOSOK CORPORATION
    Inventors: Mamoru Murakami, Hiroaki Kosugi, Kunio Kimpara
  • Publication number: 20200182363
    Abstract: A hydraulic control apparatus includes an output-side oil passage into which oil from a first oil passage and oil from a second oil passage flow, and a pressure regulating check valve regulating a hydraulic pressure in the second oil passage. The pressure regulating check valve includes first and second elastic portions housed in a spool hole between a valve body and a bottom of the spool hole. A natural length of the second elastic portion is shorter than a distance between the valve body and the bottom when the valve body closes an inflow hole. The second elastic portion applies an elastic force to the valve body in a state in which the valve body opens the inflow hole.
    Type: Application
    Filed: December 2, 2019
    Publication date: June 11, 2020
    Inventors: Kunio KIMPARA, Masayuki NOJO, Mamoru MURAKAMI, Hiroaki KOSUGI
  • Patent number: 10591052
    Abstract: A shift control device includes: a hydraulic circuit, an actuation valve, a control unit, and a pressure holding valve. The hydraulic circuit is provided with a supply oil passage coupled to a hydraulic oil supply source, a drain oil passage coupled to a tank, and an actuator oil passage coupled to a travel actuator. The actuation valve is provided in the hydraulic circuit and couples the actuator oil passage to the supply oil passage or the drain oil passage. The control unit switches the actuation valve in accordance with a shift position command of a shift operation device. The pressure holding valve is provided in the drain oil passage and holds a pressure of the drain oil passage at a predetermined pressure.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: March 17, 2020
    Assignee: SUBARU CORPORATION
    Inventors: Daisuke Kidachi, Mamoru Murakami, Yoshinobu Yamazaki
  • Publication number: 20190085975
    Abstract: A shift control device includes a hydraulic circuit and a control unit. The hydraulic circuit is provided with multiple actuation valves. The control unit is configured to switch positions or states of each of the multiple actuation valves in accordance with a shift position command by a shift operation device. The hydraulic circuit is configured to couplesa hydraulic oil supply source to one of travel actuators in an automatic transmission in multiple circuit states where the position or the state of at least one of the multiple actuation valves differs.
    Type: Application
    Filed: June 1, 2018
    Publication date: March 21, 2019
    Inventors: Daisuke KIDACHI, Mamoru MURAKAMI, Taich TSUJI
  • Publication number: 20190085974
    Abstract: A shift control device includes: a hydraulic circuit, an actuation valve, a control unit, and a pressure holding valve. The hydraulic circuit is provided with a supply oil passage coupled to a hydraulic oil supply source, a drain oil passage coupled to a tank, and an actuator oil passage coupled to a travel actuator. The actuation valve is provided in the hydraulic circuit and couples the actuator oil passage to the supply oil passage or the drain oil passage. The control unit switches the actuation valve in accordance with a shift position command of a shift operation device. The pressure holding valve is provided in the drain oil passage and holds a pressure of the drain oil passage at a predetermined pressure.
    Type: Application
    Filed: June 1, 2018
    Publication date: March 21, 2019
    Inventors: Daisuke Kidachi, Mamoru MURAKAMI, Yoshinobu YAMAZAKI
  • Patent number: 10115505
    Abstract: The invention relates to a chip resistor. A method of manufacturing a chip resistor comprises the steps of: (a) applying a conductive paste on an insulating substrate, wherein the conductive paste comprises, (i) 40 to 80 weight percent (wt. %) of a conductive powder; (ii) 1 to 14 wt. % of a glass frit, (iii) 0.01 to 3 wt. % of magnesium oxide (MgO), and (iv) 10 to 55 wt. % of an organic vehicle, wherein the wt. % is based on weight of the conductive paste; (b) firing the applied conductive paste to form the front electrodes.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: October 30, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Mamoru Murakami, Yusuke Tachibana
  • Publication number: 20180274670
    Abstract: In a hydraulic control device, a first valve device is brought into an open state when a first value obtained by subtracting a value of a pressure in the first output side oil passage from a value of a pressure in the second output side oil passage is equal to or larger than a first threshold value. A second valve device is brought into an open state when an oil pressure in a third connection oil passage is equal to or larger than a second threshold value, and is brought into a closed state when the oil pressure in the third connection oil passage is smaller than the second threshold value. The first value is equal to or larger than the first threshold value and the first valve device is in the open state when the second valve device is in the closed state.
    Type: Application
    Filed: March 21, 2018
    Publication date: September 27, 2018
    Inventors: Mamoru MURAKAMI, Hiroaki KOSUGI, Kunio KIMPARA
  • Publication number: 20180240576
    Abstract: The invention relates to a chip resistor. A method of manufacturing a chip resistor comprises the steps of: (a) applying a conductive paste on an insulating substrate, wherein the conductive paste comprises, (i) 40 to 80 weight percent (wt. %) of a conductive powder; (ii) 1 to 14 wt. % of a glass frit, (iii) 0.01 to 3 wt. % of magnesium oxide (MgO), and (iv) 10 to 55 wt. % of an organic vehicle, wherein the wt. % is based on weight of the conductive paste; (b) firing the applied conductive paste to form the front electrodes.
    Type: Application
    Filed: February 23, 2017
    Publication date: August 23, 2018
    Inventors: Mamoru Murakami, YUSUKE TACHIBANA
  • Patent number: 9752646
    Abstract: A damper device is disposed between an engine and a transmission and has a torque distribution mechanism that is provided with a first input element connected to the engine, a second input element connected to the engine via an elastic member, a first output element connected to the transmission, and a second output element connected to the transmission. The damper device further has a first clutch that is disposed between the first output element and the transmission, and is switched between an engaged state of connecting the first output element to the transmission and a released state of disconnecting the first output element from the transmission, and a second clutch that is disposed between the second output element and the transmission, and is switched between an engaged state of connecting the second output element to the transmission and a released state of disconnecting the second output element from the transmission.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: September 5, 2017
    Assignee: SUBARU CORPORATION
    Inventors: Yasuyuki Ukon, Mamoru Murakami, Yuuki Suzuki, Tsuyoshi Shinohara
  • Patent number: 9561440
    Abstract: A server device according to the present invention, which is connected to a plurality of player terminals through a network, includes a storage unit configured to store an initial upper limit of number of groups and an initial threshold value smaller than an upper limit of a group affiliation rate, which is a ratio of number of affiliated persons with respect to a quota of a group, a group generating portion configured to generate a plurality of groups to which the group affiliation rate of the initial threshold value is set, at a start of a game, based on the initial upper limit of the number of groups, and a player distributing portion configured to distribute players to groups.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: February 7, 2017
    Assignee: DeNA Co., Ltd.
    Inventors: Yusuke Sumaki, Kazuki Nakatani, Mamoru Murakami, Yutaka Muto, Masaki Arizuka