Patents by Inventor Keita Nakano
Keita Nakano 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).
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Patent number: 11950498Abstract: This compound is represented by formula (1)Type: GrantFiled: June 22, 2018Date of Patent: April 2, 2024Assignee: IDEMITSU KOSAN CO., LTD.Inventors: Ryota Takahashi, Keita Seda, Yuki Nakano
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Patent number: 11912952Abstract: A material comprising: a support 10; and a brush layer 20 containing a brush-like polymer chain assemblage 21 formed of a plurality of polymer chains and a swelling liquid 22, in which a brush layer 20 is swollen with the swelling liquid 22, the brush layer 20 retaining on the surface a lubricating liquid 30, and the swelling liquid 22 contained in the brush layer 20 and the lubricating liquid 30 being phase-separated to form a liquid-liquid phase separation interface 40 in between and a sliding system using the material.Type: GrantFiled: December 1, 2020Date of Patent: February 27, 2024Assignees: KYOTO UNIVERSITY, NATIONAL INSTITUTE OF TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITYInventors: Yoshinobu Tsujii, Keita Sakakibara, Takaya Sato, Hiroyuki Arafune, Ken Nakano, Mayu Miyazaki
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Patent number: 11572049Abstract: A brake control device controls a hydraulic brake that generates hydraulic braking force and an electric parking brake that generates parking braking force different from the hydraulic braking force. The brake control device comprises: a detection unit that detects a parking brake operation for causing the electric parking brake to generate the parking braking force; and a control unit that causes the electric parking brake to generate the parking braking force when the hydraulic braking force per wheel generated by the hydraulic brake, after decreasing below the minimum first braking force per wheel required for maintaining the vehicle stop state only by the electric parking brake, is less than the first braking force, in association with the parking brake operation having been performed in a state where the stop state is maintained only by a hydraulic brake operation for causing the hydraulic brake to generate the hydraulic braking force.Type: GrantFiled: August 9, 2017Date of Patent: February 7, 2023Assignee: ADVICS CO., LTD.Inventors: Tatsuya Urano, Keita Nakano, Terushige Uraoka
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Patent number: 11518355Abstract: A brake control device for controlling an electric parking brake may include: a piston capable of pressing a brake pad in accordance with the hydraulic pressure in a cylinder; a linearly moving member that adjusts, by reciprocating in the cylinder, the pressing force applied to the brake pad by the piston; and an actuator that moves the linearly moving member by operating based on a target pressing force, which is a target value of the pressing force corresponding to an output value obtained from a sensor that detects information correlating with the hydraulic pressure. The brake control device is provided with: an abnormality detection unit that detects an abnormality of the sensor; and an actuator control unit that, if an abnormality is detected, controls the operation level of the actuator based on an output value obtained prior to the detection of the abnormality.Type: GrantFiled: August 31, 2018Date of Patent: December 6, 2022Assignee: ADVICS CO., LTD.Inventors: Terushige Uraoka, Keita Nakano
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Patent number: 11440524Abstract: The present disclosure provides a brake control device applied to a vehicle including a hydraulic brake device that generates a hydraulic braking force by pressing a braking member with hydraulic pressure toward a member-to-be-braked that rotates integrally with a wheel; and an electric brake device that generates an electric braking force by pressing the braking member by driving a motor toward the member-to-be-braked. A controller that controls the electric brake device is provided. The controller executes, when a predetermined condition is satisfied, a positional control for driving a motor and moving a propeller shaft that transmits the driving force of the motor to the braking member toward the member-to-be-braked as compared to when the predetermined condition is not satisfied.Type: GrantFiled: April 26, 2019Date of Patent: September 13, 2022Assignee: ADVICS CO., LTD.Inventors: Hirotaka Takeya, Shunsuke Murata, Keita Nakano
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Patent number: 11370251Abstract: A tire 1 comprises a tread portion 2 whose position when mounted on a vehicle is specified. The tread portion 2 comprises an outer tread edge (To), an inner tread edge (Ti), a plurality of main grooves 10, and a plurality of land regions 15. The main grooves 10 include a first main groove 11 whose groove edges are both positioned on an inner-tread-edge-(Ti) side of a tire equator (C), a second main groove 12 arranged on an inner-tread-edge-(Ti) side of the first main groove 11, and a third main groove 13 arranged between the tire equator (C) and the outer tread edge (To) and having a groove width smaller than the first and second main grooves 11 and 12. The land regions 15 include an inner middle land region 16 and an outer middle land region 17 having an axial width larger than the inner middle land region 16.Type: GrantFiled: January 30, 2018Date of Patent: June 28, 2022Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoshiyuki Maeda, Keita Nakano
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Patent number: 11267444Abstract: The brake control device controls a hydraulic brake to generate hydraulic braking force on both the front and rear wheels of a four-wheel-drive vehicle, and an electrical parking brake to generate parking brake force, different from the hydraulic braking force, on the front or rear wheels. The brake control device includes: a detection unit that detects parking brake operation for causing the electrical parking brake to generate a parking brake force; and a control unit for reducing the hydraulic braking force generated on the front wheels or the rear wheels and adjusting the hydraulic braking force on the other of the front wheels or the rear wheels to a magnitude allowing a stationary vehicle state to be maintained, before a parking brake force is generated by the electrical parking brake, when a parking brake operation is detected while a stationary state is being maintained solely by the hydraulic braking force.Type: GrantFiled: September 22, 2017Date of Patent: March 8, 2022Assignee: ADVICS CO., LTD.Inventors: Terushige Uraoka, Keita Nakano, Tatsuya Urano
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Publication number: 20220017056Abstract: The present invention relates to, for example, a vehicle control device including a driving force control unit that controls a driving force generated by a wheel of a vehicle; and a braking force control unit that controls a braking force generated by the wheel; where the driving force control unit generates the driving force of a first prescribed amount and the braking force control unit generates the braking force of a second prescribed amount to control the speed of the vehicle to be constant; and acceleration or deceleration are both controllable by performing one of control of the driving force by the driving force control unit and control of the braking force by the braking force control unit.Type: ApplicationFiled: February 25, 2020Publication date: January 20, 2022Applicant: ADVICS CO., LTD.Inventors: Hirotaka TAKEYA, Keita NAKANO
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Publication number: 20210387607Abstract: The present disclosure provides a brake control device applied to a vehicle including a hydraulic brake device that generates a hydraulic braking force by pressing a braking member with hydraulic pressure toward a member-to-be-braked that rotates integrally with a wheel; and an electric brake device that generates an electric braking force by pressing the braking member by driving a motor toward the member-to-be-braked. A controller that controls the electric brake device is provided. The controller executes, when a predetermined condition is satisfied, a positional control for driving a motor and moving a propeller shaft that transmits the driving force of the motor to the braking member toward the member-to-be-braked as compared to when the predetermined condition is not satisfied.Type: ApplicationFiled: April 26, 2019Publication date: December 16, 2021Applicant: ADVICS CO., LTD.Inventors: Hirotaka TAKEYA, Shunsuke MURATA, Keita NAKANO
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Patent number: 11021018Abstract: A tire includes a tread portion including first to third main grooves continuously extending in a tire circumferential direction. The first main groove has a groove centerline arranged on a side of the inboard tread edge with respect to a tire equator and the groove centerline is located at an axial distance L1 from the tire equator of from 5% to 25% of a tread half width. The second main groove is arranged between the first main groove and the inboard tread edge and has a groove centerline located at an axial distance L2 from the tire equator of from 35% to 65% of the tread half width. The third main groove is arranged between the tire equator and the outboard tread edge and has a groove centerline located at an axial distance L3 from the tire equator of from 25% to 55% of the tread half width.Type: GrantFiled: March 23, 2018Date of Patent: June 1, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoshiyuki Maeda, Keita Nakano
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Publication number: 20210094521Abstract: A brake control device for controlling an electric parking brake may include: a piston capable of pressing a brake pad in accordance with the hydraulic pressure in a cylinder; a linearly moving member that adjusts, by reciprocating in the cylinder, the pressing force applied to the brake pad by the piston; and an actuator that moves the linearly moving member by operating based on a target pressing force, which is a target value of the pressing force corresponding to an output value obtained from a sensor that detects information correlating with the hydraulic pressure. The brake control device is provided with: an abnormality detection unit that detects an abnormality of the sensor; and an actuator control unit that, if an abnormality is detected, controls the operation level of the actuator based on an output value obtained prior to the detection of the abnormality.Type: ApplicationFiled: August 31, 2018Publication date: April 1, 2021Applicant: ADVICS CO., LTD.Inventors: Terushige URAOKA, Keita NAKANO
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Publication number: 20200017081Abstract: The brake control device controls a hydraulic brake to generate hydraulic braking force on both the front and rear wheels of a four-wheel-drive vehicle, and an electrical parking brake to generate parking brake force, different from the hydraulic braking force, on the front or rear wheels. The brake control device includes: a detection unit that detects parking brake operation for causing the electrical parking brake to generate a parking brake force; and a control unit for reducing the hydraulic braking force generated on the front wheels or the rear wheels and adjusting the hydraulic braking force on the other of the front wheels or the rear wheels to a magnitude allowing a stationary vehicle state to be maintained, before a parking brake force is generated by the electrical parking brake, when a parking brake operation is detected while a stationary state is being maintained solely by the hydraulic braking force.Type: ApplicationFiled: September 22, 2017Publication date: January 16, 2020Applicant: ADVICS CO., LTD.Inventors: Terushige URAOKA, Keita NAKANO, Tatsuya URANO
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Patent number: 10427465Abstract: A pneumatic tire include a tread portion with a designated installing direction to a vehicle to define an outboard tread edge and an inboard tread edge, the tread portion including an inboard portion defined between the inboard tread edge and a tire equator and an outboard portion defined between the outboard tread edge and the tire equator. The inboard portion is provided with a circumferentially and continuously extending first main groove and a circumferentially and continuously extending second main groove arranged between the first main groove and the inboard tread edge. An axial distance from the tire equator to a centerline of the second main groove is in a range of from 0.35 to 0.75 times of a width of the inboard portion. No circumferentially and continuously extending main grooves are provided with the outboard portion.Type: GrantFiled: July 27, 2016Date of Patent: October 1, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuma Kodaka, Toshiyuki Nakano, Keita Nakano
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Publication number: 20190176790Abstract: A brake control device controls a hydraulic brake that generates hydraulic braking force and an electric parking brake that generates parking braking force different from the hydraulic braking force. The brake control device comprises: a detection unit that detects a parking brake operation for causing the electric parking brake to generate the parking braking force; and a control unit that causes the electric parking brake to generate the parking braking force when the hydraulic braking force per wheel generated by the hydraulic brake, after decreasing below the minimum first braking force per wheel required for maintaining the vehicle stop state only by the electric parking brake, is less than the first braking force, in association with the parking brake operation having been performed in a state where the stop state is maintained only by a hydraulic brake operation for causing the hydraulic brake to generate the hydraulic braking force.Type: ApplicationFiled: August 9, 2017Publication date: June 13, 2019Applicant: ADVICS CO., LTD.Inventors: Tatsuya URANO, Keita NAKANO, Terushige URAOKA
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Patent number: 10195906Abstract: A tire includes a tread portion having an installing direction to a vehicle so as to have an outboard tread edge. The tread portion is provided with a plurality of first inclined grooves each having an inclination to a circumferential direction of the tire and extending from at least a tire equator to the outboard tread edge, a plurality of second inclined grooves each having an opposite inclination to the inclination of the first inclined grooves and extending from at least the tire equator toward the outboard tread edge, and a plurality of blocks separated by the first inclined grooves and the second inclined grooves. Each second inclined groove includes an outboard end that terminates at one of the first inclined grooves so that a plurality of substantially trapezoidal shoulder blocks are arranged along the outboard tread edge.Type: GrantFiled: March 10, 2016Date of Patent: February 5, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Keita Nakano
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Publication number: 20180281528Abstract: A tire includes a tread portion including first to third main grooves continuously extending in a tire circumferential direction. The first main groove has a groove centerline arranged on a side of the inboard tread edge with respect to a tire equator and the groove centerline is located at an axial distance L1 from the tire equator of from 5% to 25% of a tread half width. The second main groove is arranged between the first main groove and the inboard tread edge and has a groove centerline located at an axial distance L2 from the tire equator of from 35% to 65% of the tread half width. The third main groove is arranged between the tire equator and the outboard tread edge and has a groove centerline located at an axial distance L3 from the tire equator of from 25% to 55% of the tread half width.Type: ApplicationFiled: March 23, 2018Publication date: October 4, 2018Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Yoshiyuki MAEDA, Keita NAKANO
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Publication number: 20180215205Abstract: A tire 1 comprises a tread portion 2 whose position when mounted on a vehicle is specified. The tread portion 2 comprises an outer tread edge (To), an inner tread edge (Ti), a plurality of main grooves 10, and a plurality of land regions 15. The main grooves 10 include a first main groove 11 whose groove edges are both positioned on an inner-tread-edge-(Ti) side of a tire equator (C), a second main groove 12 arranged on an inner-tread-edge-(Ti) side of the first main groove 11, and a third main groove 13 arranged between the tire equator (C) and the outer tread edge (To) and having a groove width smaller than the first and second main grooves 11 and 12. The land regions 15 include an inner middle land region 16 and an outer middle land region 17 having an axial width larger than the inner middle land region 16.Type: ApplicationFiled: January 30, 2018Publication date: August 2, 2018Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Yoshiyuki MAEDA, Keita NAKANO
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Publication number: 20170349153Abstract: An increase in startup current supplied to a motor is suppressed at an initial stage of starting automatic braking control, while current supply to the motor is performed in a fully energized state after the automatic braking control is started. While output of the motor is increased by controlling the motor in the fully energized state so that a high braking force with high responsiveness is obtained, startup current is prevented from becoming excessive by performing high frequency control only at startup. Thus, decrease in battery voltage is minimized and thus the occurrence of malfunction is minimized in the control systems of various electrical components used in the vehicle.Type: ApplicationFiled: December 17, 2015Publication date: December 7, 2017Inventors: Hironobu YAMASHITA, Takahiro YAMAGUCHI, Kennji FUJIWARA, Takashi MURAYAMA, Keita NAKANO, Aritomo NABETA
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Patent number: 9796367Abstract: A vehicle brake device includes a hydraulic pressure generating device, a valve device, a pump and an accumulation section forming an accumulation chamber connected to a fluid passage between the valve device and the hydraulic pressure generating device or to a master chamber. A dead band is set in which the change of force of the magnitude corresponding to the hydraulic pressure in the master chamber does not substantially act on a brake operating member. A characteristic representing the relation between the pressure and the brake fluid quantity in the accumulation chamber is set based on a characteristic representing the relation between the pressure and the brake fluid quantity in a wheel cylinder and the dead band so that, when brake fluid is flowing into and from the accumulation chamber, a force of the magnitude corresponding to the master chamber hydraulic pressure does not act on the brake operating member.Type: GrantFiled: January 25, 2013Date of Patent: October 24, 2017Assignee: ADVICS CO., LTD.Inventors: Yoshihiro Miyata, Yasuhiro Hineno, Keita Nakano, Takanori Iida
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Publication number: 20170217862Abstract: The present invention is a method for producing a cyclopentyl alkyl ether compound comprising reacting substituted or unsubstituted cyclopentene with an alcohol compound represented by a formula (2): R1OH in the presence of an acidic zeolite, the cyclopentyl alkyl ether compound being represented by a formula (1): R1—O—R2, wherein R1 represents a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 8 carbon atoms, and R2 represents a substituted or unsubstituted cyclopentyl group. The present invention provides a method that can produce a cyclopentyl alkyl ether with high reaction efficiency through a liquid-phase reaction even when the raw material feed rate (amount) is increased.Type: ApplicationFiled: March 25, 2015Publication date: August 3, 2017Applicants: ZEON CORPORATION, THE UNIVERSITY OF TOKYOInventors: Keita NAKANO, Mitsuru SUGAWARA, Shu KOBAYASHI