Patents by Inventor Masaki Nanahara

Masaki Nanahara 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: 11105387
    Abstract: An electric brake actuator including a retracting torque applying mechanism that applies a retracting torque to a rotational shaft and including: a torsion spring; a stator including a first retaining portion retaining one end portion of the torsion spring; a rotor including a second retaining portion retaining the other end portion of the torsion spring and configured to be rotated relative to the stator so as to twist the torsion spring; and a clutch mechanism configured to selectively establish a clutch ON state and a clutch OFF state, wherein a first retaining portion prohibits the one end portion from being displaced in a forward rotational direction and includes a biasing member that biases the one end portion in the forward rotational direction, the first retaining portion being configured to allow the one end portion to be displaced in a reverse rotational direction against a biasing force of the biasing member.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: August 31, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Takayuki Wazaki
  • Patent number: 11098778
    Abstract: An electric brake actuator configured to push a friction member onto a rotary body by advancing a piston by rotating an input shaft by an electric motor, including: a torque imparting device configured to impart, to an input shaft, a torque in a direction to retract a piston based on an elastic torque of a torsion spring and including a mechanism configured to allow a first retained portion provided at one end portion of the torsion spring to be retained by another one of a plurality of first retaining portions of a stator when the elastic torque exceeds a set upper-limit torque to decrease the elastic torque; and a mechanism configured to permit a second retained portion of a rotor to be retained by a second retaining portion provided at the other end portion of the spring to prohibit the elastic torque from becoming smaller than a set lower-limit torque.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: August 24, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Naoki Yabusaki, Yuta Morikawa
  • Publication number: 20210158280
    Abstract: An information processing apparatus includes a controller that acquires delivery information including information concerning one or more packages transported by a vehicle or a recipient of the one or more packages, and selects, based on the delivery information, one or more service units to be loaded on the vehicle from among a plurality of service units having different capabilities that provides a service associated with the one or more packages.
    Type: Application
    Filed: November 24, 2020
    Publication date: May 27, 2021
    Inventors: Shintaro Matsutani, Aya Sato, Yasuki Nakagawa, Shigeru Inamori, Fuminori Matsuoka, Taro Hasegawa, Masaki Nanahara, Misaki Sato, Motoki Maekawa, Hiroki Ashizawa
  • Publication number: 20210150655
    Abstract: An information processing apparatus includes a controller configured to acquire package information, which is information on a size of one or more packages to be transported, select, based on the package information, a storage apparatus to be loaded on a vehicle from among a plurality of storage apparatuses having different characteristics that is capable of containing the one or more packages in a plurality of compartments that is capable of being independently locked, and generate a command to load the selected storage apparatus on the vehicle.
    Type: Application
    Filed: November 18, 2020
    Publication date: May 20, 2021
    Inventors: Shintaro Matsutani, Aya Sato, Yasuki Nakagawa, Shigeru Inamori, Fuminori Matsuoka, Taro Hasegawa, Masaki Nanahara, Misaki Sato, Motoki Maekawa, Hiroki Ashizawa
  • Publication number: 20210146795
    Abstract: An information processing apparatus controls a vehicle having a service power supply used to provide a service and a driving power supply used for traveling. The information processing apparatus has a storage unit configured to store service-related information concerning the service provided by the vehicle, and a controller configured to select any of a first mode, in which the service power supply and the driving power supply are independently used, and a second mode, in which the service power supply and the driving power supply are shared, based on the service-related information.
    Type: Application
    Filed: November 18, 2020
    Publication date: May 20, 2021
    Inventors: Shintaro Matsutani, Aya Sato, Yasuki Nakagawa, Shigeru Inamori, Fuminori Matsuoka, Taro Hasegawa, Masaki Nanahara, Misaki Sato, Motoki Maekawa, Hiroki Ashizawa
  • Publication number: 20210139094
    Abstract: An information processing apparatus comprises a controller configured to determine a combination of two or more units having different functions to be loaded on a vehicle platform, and generate a command to assemble a vehicle used for a predetermined application from the determined units.
    Type: Application
    Filed: November 11, 2020
    Publication date: May 13, 2021
    Inventors: Shintaro Matsutani, Aya Sato, Yasuki Nakagawa, Shigeru Inamori, Fuminori Matsuoka, Taro Hasegawa, Masaki Nanahara, Misaki Sato, Motoki Maekawa, Hiroki Ashizawa
  • Publication number: 20200263768
    Abstract: A motion conversion mechanism includes a shaft having an external thread and a cylinder having an internal thread that is screwed with the external thread. The motion conversion mechanism converts rotating motion of one of the shaft and the cylinder into linear motion of the other of the shaft and the cylinder. The cylinder is provided with two internal thread portions, each having the internal thread, such that a threadless portion is interposed between the two internal thread portions in an axial direction.
    Type: Application
    Filed: January 16, 2020
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masaki Nanahara
  • Publication number: 20200240485
    Abstract: An electric brake actuator including a retracting torque applying mechanism that applies a retracting torque to a rotational shaft and including: a torsion spring; a stator including a first retaining portion retaining one end portion of the torsion spring; a rotor including a second retaining portion retaining the other end portion of the torsion spring and configured to be rotated relative to the stator so as to twist the torsion spring; and a clutch mechanism configured to selectively establish a clutch ON state and a clutch OFF state, wherein a first retaining portion prohibits the one end portion from being displaced in a forward rotational direction and includes a biasing member that biases the one end portion in the forward rotational direction, the first retaining portion being configured to allow the one end portion to be displaced in a reverse rotational direction against a biasing force of the biasing member.
    Type: Application
    Filed: January 14, 2020
    Publication date: July 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Takayuki Wazaki
  • Publication number: 20200156612
    Abstract: A brake actuator includes: a housing; an electric motor with a hollow motor shaft rotating; a rotating shaft disposed inside the motor shaft to be coaxial therewith; a piston with a rear end disposed inside the motor shaft and a front end engaged with the friction member; a speed reduction mechanism decelerating rotation transmitted from the motor shaft and transmitting the rotation to the rotating shaft; and a motion conversion mechanism converting a rotating motion of the rotating shaft into an advancing/retracting motion of the piston. The motor shaft is rotatably supported by the housing at an outer peripheral surface thereof, and the rotating shaft is rotatably supported by an inner peripheral surface of the motor shaft via rollers at an outer peripheral surface thereof as well as by the housing via a thrust bearing at a rear end of the rotating shaft.
    Type: Application
    Filed: November 18, 2019
    Publication date: May 21, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nao IKUMA, Masaki NANAHARA, Naoki YABUSAKI
  • Publication number: 20190293134
    Abstract: An electric brake actuator configured to push a friction member onto a rotary body by advancing a piston by rotating an input shaft by an electric motor, including: a torque imparting device configured to impart, to an input shaft, a torque in a direction to retract a piston based on an elastic torque of a torsion spring and including a mechanism configured to allow a first retained portion provided at one end portion of the torsion spring to be retained by another one of a plurality of first retaining portions of a stator when the elastic torque exceeds a set upper-limit torque to decrease the elastic torque; and a mechanism configured to permit a second retained portion of a rotor to be retained by a second retaining portion provided at the other end portion of the spring to prohibit the elastic torque from becoming smaller than a set lower-limit torque.
    Type: Application
    Filed: March 18, 2019
    Publication date: September 26, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki NANAHARA, Naoki YABUSAKI, Yuta MORIKAWA
  • Patent number: 10247270
    Abstract: A motion conversion mechanism includes: a cylindrical body having an internal screw and third gear teeth in an inner periphery thereof, the internal screw being provided in a screw region that is an intermediate region in an axial direction of the cylindrical body; a shaft body disposed coaxially with the cylindrical body inside the cylindrical body and having first gear teeth and a first external screw in an outer periphery thereof; and a plurality of planetary rollers. First planetary rollers among the planetary rollers mesh with the gear teeth formed in a first gear region and do not mesh with the gear teeth formed in a second gear region, and second planetary rollers among the planetary rollers mesh with the gear teeth formed in the second gear region and do not mesh with the gear teeth formed in the first gear region.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: April 2, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masaki Nanahara
  • Publication number: 20180142747
    Abstract: A motion conversion mechanism includes: a cylindrical body having an internal screw and third gear teeth in an inner periphery thereof, the internal screw being provided in a screw region that is an intermediate region in an axial direction of the cylindrical body; a shaft body disposed coaxially with the cylindrical body inside the cylindrical body and having first gear teeth and a first external screw in an outer periphery thereof; and a plurality of planetary rollers. First planetary rollers among the planetary rollers mesh with the gear teeth formed in a first gear region and do not mesh with the gear teeth formed in a second gear region, and second planetary rollers among the planetary rollers mesh with the gear teeth formed in the second gear region and do not mesh with the gear teeth formed in the first gear region.
    Type: Application
    Filed: November 10, 2017
    Publication date: May 24, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masaki NANAHARA
  • Patent number: 9969379
    Abstract: A method for detecting fluid leakage from a pressure-decrease valve in a hydraulic brake system having an ABS device including: a shutoff valve for shutting off supply of a working fluid from a fluid-pressure supply source to a brake device provided for a wheel; the pressure-decrease valve for discharging the working fluid from the brake device; a reservoir for storing the working fluid discharged from the pressure-decrease valve; and a return pump for returning the working fluid stored in the reservoir to a portion between the shutoff valve and the fluid-pressure supply source, the method including the steps of: activating the return pump in a state in which the hydraulic brake system is not in ABS operation, and detecting the fluid leakage from the pressure-decrease valve based on a variation in a pressure of the working fluid in the fluid-pressure supply source caused when the return pump is activated.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: May 15, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.
    Inventors: Masaki Nanahara, Masayasu Ohkubo, Kazutaka Noro, Masaki Ninoyu, Takahiro Okano
  • Patent number: 9714721
    Abstract: In an electromagnetic valve in which a valve body unit is housed in a housing, the unit has a plunger including a groove portion at its cylindrical outer peripheral face. The groove portion extends in the cylinder axis direction and moves in the cylinder axis direction by an electromagnetic force generated by an electromagnetic coil. A rod is secured to the plunger and abuts against a valve seat for opening and closing the valve when the plunger is moved to close the valve and releasing the abutment of the rod against the seat when the plunger is moved to open the valve. A cylindrical sleeve covers the outer peripheral face of the plunger and is configured integrally with the plunger. A communication passage defined by the groove portion of the plunger and the inner peripheral face of the sleeve extends in the cylinder axis direction.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: July 25, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Kei Sato, Takeshi Ishida
  • Patent number: 9586488
    Abstract: A first ECU estimates whether the operation of a second actuator has been started, based on the variation of the hydraulic pressure with respect to the flow rate of hydraulic fluid outputted from a first actuator. Even in a case where the operation information of the second actuator is not received, the first ECU sets the control mode to a simultaneous operation mode, when it is estimated that the operation of the second actuator has been started. In the simultaneous operation mode, a controlled parameter of linear control valves on assumption that the second actuator is operating is set up, and a stop instruction of regenerative braking is transmitted to a hybrid ECU.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: March 7, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Nakaoka, Kei Sato, Kazunori Nimura, Kentaro Oya, Takeshi Ishida, Masaki Nanahara, Tsuyoshi Yamasaki, Yoshito Tanaka, Masayasu Ohkubo
  • Patent number: 9453585
    Abstract: An electromagnetic linear valve which can effectively suppress a self-excited oscillation of a plunger is provided. A resilient member 64 urges a plunger 22 in a direction in which the core-opposing portions 70, 78 move away from a core portion 28, and moves the plunger 22 in a direction in which the core-opposing portions 70, 78 approach the core portion 28 in the case where an electric current is supplied to a coil 24.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 27, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kei Sato, Masaki Nanahara, Katsuhiro Kanamori, Masakuni Suzuki, Takeshi Ishida
  • Patent number: 9366354
    Abstract: A normally closed solenoid valve includes a valve element arranged to be seatable on and unseatable from a valve seat. A movable core is movable with the valve element. A first spring biases the valve element and the movable core toward the valve seat. A coil and a stator core generate an electromagnetic force resistive to a load of the first spring for the movable core. A second spring applies a load smaller than and resistive to the load of the first spring to the valve element and the movable core. The valve further includes a load adjusting mechanism for adjusting the load of the first spring, and a stroke adjusting mechanism for adjusting an unseating stroke of the valve element from the valve seat.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: June 14, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Yoshito Tanaka, Kei Sato
  • Publication number: 20160096434
    Abstract: A first ECU estimates whether the operation of a second actuator has been started, based on the variation of the hydraulic pressure with respect to the flow rate of hydraulic fluid outputted from a first actuator. Even in a case where the operation information of the second actuator is not received, the first ECU sets the control mode to a simultaneous operation mode, when it is estimated that the operation of the second actuator has been started. In the simultaneous operation mode, a controlled parameter of linear control valves on assumption that the second actuator is operating is set up, and a stop instruction of regenerative braking is transmitted to a hybrid ECU.
    Type: Application
    Filed: May 21, 2013
    Publication date: April 7, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi NAKAOKA, Kei SATO, Kazunori NIMURA, Kentaro OYA, Takeshi ISHIDA, Masaki NANAHARA, Tsuyoshi YAMASAKI, Yoshito TANAKA, Masayasu OHKUBO
  • Publication number: 20160059839
    Abstract: A method for detecting fluid leakage from a pressure-decrease valve in a hydraulic brake system having an ABS device including: a shutoff valve for shutting off supply of a working fluid from a fluid-pressure supply source to a brake device provided for a wheel; the pressure-decrease valve for discharging the working fluid from the brake device; a reservoir for storing the working fluid discharged from the pressure-decrease valve; and a return pump for returning the working fluid stored in the reservoir to a portion between the shutoff valve and the fluid-pressure supply source, the method including the steps of: activating the return pump in a state in which the hydraulic brake system is not in ABS operation, and detecting the fluid leakage from the pressure-decrease valve based on a variation in a pressure of the working fluid in the fluid-pressure supply source caused when the return pump is activated.
    Type: Application
    Filed: July 29, 2015
    Publication date: March 3, 2016
    Inventors: Masaki NANAHARA, Masayasu OHKUBO, Kazutaka NORO, Masaki NINOYU, Takahiro OKANO
  • Publication number: 20150369387
    Abstract: In an electromagnetic valve in which a valve body unit is housed in a housing, the unit has a plunger including a groove portion at its cylindrical outer peripheral face. The groove portion extends in the cylinder axis direction and moves in the cylinder axis direction by an electromagnetic force generated by an electromagnetic coil. A rod is secured to the plunger and abuts against a valve seat for opening and closing the valve when the plunger is moved to close the valve and releasing the abutment of the rod against the seat when the plunger is moved to open the valve. A cylindrical sleeve covers the outer peripheral face of the plunger and is configured integrally with the plunger. A communication passage defined by the groove portion of the plunger and the inner peripheral face of the sleeve extends in the cylinder axis direction.
    Type: Application
    Filed: March 11, 2013
    Publication date: December 24, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki NANAHARA, Kei SATO, Takeshi ISHIDA