Patents by Inventor Masanori Ikari

Masanori Ikari 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: 11339057
    Abstract: To a co-precipitating aqueous solution, aqueous solutions containing (a) Tb ions, (b) at least one other rare earth ions selected from the group consisting of Y ions and lanthanoid rare earth ions (excluding Tb ions), (c) Al ions and (d) Sc ions are added; the resulting solution is stirred at a liquid temperature of 50° C. or less to induce a co-precipitate of the components (a), (b), (c) and (d); the co-precipitate is filtered, heated and dehydrated; and the co-precipitate is fired thereafter at from 1,000° C. to 1,300° C., thereby forming a sinterable garnet-type complex oxide powder.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: May 24, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Keita Tanaka, Masanori Ikari
  • Publication number: 20220146866
    Abstract: An optical isolator includes a Faraday rotator including a trivalent ion exchange TAG (terbium-aluminum garnet), and arranged around the Faraday rotator, a central hollow magnet and a first and a second hollow magnet units arranged to sandwich the central hollow magnet in an optical axis direction. A magnetic flux density B [T] in the Faraday rotator and an optical path length L [mm] where the Faraday rotator is arranged satisfy 0<B??(1) and 14.0?L?24.0??(2). The optical isolator, compared with a conventional Faraday rotator such as a terbium-gallium garnet (TGG) crystal, contributes to reduction of a thermal lensing effect, being a pending problem, in a high-output fiber laser.
    Type: Application
    Filed: October 2, 2019
    Publication date: May 12, 2022
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira YAHAGI, Masanori IKARI, Takuto MATSUMOTO
  • Patent number: 11293164
    Abstract: A wheel loader includes a boom, a forward clutch, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for bringing the forward clutch into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 5, 2022
    Assignee: KOMATSU LTD.
    Inventors: Ryota Enomoto, Masanori Ikari, Kentaro Yajima, Takuma Nishimura
  • Patent number: 11167791
    Abstract: An articulated work vehicle in which front and rear frames are linked includes a joystick lever configured to be operated by an operator, a hydraulic actuator driven by hydraulic pressure, a control valve, a force imparting component, and a controller. The joystick lever is usable to set a target steering angle. The hydraulic actuator performs an articulation to change an actual steering angle of the front frame with respect to the rear frame in response to operation of the joystick lever. The control valve controls flow of fluid supplied to the hydraulic actuator so as to make the actual steering angle coincide with the target steering angle. The force imparting component applies an assisting force or a counterforce to operation of the joystick lever. The controller controls the force imparting component so as to generate resistance to operation of the joystick lever based on a start timing of an articulation.
    Type: Grant
    Filed: May 29, 2017
    Date of Patent: November 9, 2021
    Assignee: KOMATSU LTD.
    Inventors: Yuita Takenaka, Masanobu Nakabayashi, Masanori Ikari
  • Patent number: 11161274
    Abstract: A slurry or slip composed of a dispersion medium and a dispersoid including sinterable raw material powder containing a complex oxide powder represented by the following formula (1): (Tb1-x-yRxScy)3(Al1-zScz)5O12??(1) wherein R is yttrium and/or lutetium, 0.05?x<0.45, 0<y<0.1, 0.5<1-x-y<0.95, and 0.004<z<0.2 is prepared; the slurry or slip is subsequently enclosed in a mold container to be subjected to solid-liquid separation by centrifugal casting to mold a cast compact; the cast compact is dried thereafter; a dried compact is degreased; a degreased compact is sintered thereafter; and a sintered body is further subjected to a hot isostatic pressing treatment to obtain the transparent ceramic material composed of the sintered body of garnet-type rare earth complex oxide represented by the formula (1).
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: November 2, 2021
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takuto Matsumoto, Masanori Ikari
  • Publication number: 20210292241
    Abstract: Provided is a transparent spinel sintered body which is formed from an Mg—Al spinel powder having an Al/Mg ratio of from 1.97 to 2.03 or a mixed powder of an Mg oxide and an Al oxide, and wherein the total content of metal impurities excluding Al and Mg is less than 100 ppm. A sample of this transparent spinel sintered body having a thickness of 3 mm has a total light transmittance of 80% or more in the thickness direction for the wavelength range of from 190 nm to 400 nm; and this transparent spinel sintered body is usable as a medium that transmits light from an ultraviolet light emitting element.
    Type: Application
    Filed: October 5, 2017
    Publication date: September 23, 2021
    Applicants: Shin-Etsu Chemical Co., Ltd., Shin-Etsu Chemical Co., Ltd.
    Inventor: Masanori Ikari
  • Patent number: 11124426
    Abstract: A garnet-structure complex oxide powder having formula (1) is prepared by adding an aqueous solution containing (a) Tb ion, an aqueous solution containing (b) Al ion, and an aqueous solution containing (c) Sc ion to a co-precipitating aqueous solution, to induce a co-precipitate of components (a), (b) and (c), filtering, heat drying and firing the co-precipitate. (R1-xScx)3(A1-yScy)5O12??(1) R is yttrium or a lanthanoid element, typically Tb, A is a Group 13 element, typically Al, x and y are 0<x<0.08 and 0.004<y<0.16.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: September 21, 2021
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Keita Tanaka, Masanori Ikari
  • Patent number: 10865543
    Abstract: An articulated work vehicle includes a hydraulic actuator, a control valve, a joystick lever, and a first link mechanism. A front frame is linked to a rear frame. The hydraulic actuator is configured to be driven by hydraulic pressure and configured to change a steering angle of the front frame with respect to the rear frame. The control valve is configured to control flow of fluid supplied to the hydraulic actuator. The joystick lever is disposed in a cab provided on the rear frame. The joystick lever is configured to be operated by an operator. The first link mechanism is disposed below the cab. The first link mechanism is configured to transmit an operation of the joystick lever to the control valve.
    Type: Grant
    Filed: May 29, 2017
    Date of Patent: December 15, 2020
    Assignee: KOMATSU LTD.
    Inventors: Yuita Takenaka, Masanobu Nakabayashi, Masanori Ikari
  • Patent number: 10850767
    Abstract: A work vehicle includes a hydraulic actuator, a hydraulic pump, an operation member, a control valve, an angular velocity corresponding value sensing unit, a notification component, and a controller. The actuator changes a steering angle based on a supplied fluid. The pump supplies fluid to the actuator. The operation member is operated by an operator when the steering angle is changed. The valve controls flow of fluid supplied from the pump to the actuator based on an amount the operation member is operated. The sensing unit senses a corresponding value corresponding to a steering angular velocity changed based on the flow of fluid. The notification component notifies that the corresponding value has reached a threshold value preset based on an upper limit of the steering angular velocity. The controller causes the notification component to perform a notification when it is detected that the corresponding value has reached the threshold value.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: December 1, 2020
    Assignee: KOMATSU LTD.
    Inventors: Yuita Takenaka, Masanori Ikari, Masanobu Nakabayashi
  • Patent number: 10794043
    Abstract: A work vehicle includes a hydraulic actuator, a control valve, a pressure sensing unit, a force imparting component, and a controller. The hydraulic actuator varies a steering angle. The control valve controls flow of fluid supplied to the hydraulic actuator. The operation member is configured to be operated by an operator and to control the control valve when varying the steering angle. The pressure sensing unit senses a pressure produced by the hydraulic actuator. The force imparting component imparts an assisting force or a counterforce to operation of the operation member. The controller controls the force imparting component so as to generate resistance to operation of the operation member based on a pressure value sensed by the pressure sensing unit.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 6, 2020
    Assignee: KOMATSU LTD.
    Inventors: Yuita Takenaka, Masanori Ikari, Masanobu Nakabayashi
  • Publication number: 20200299923
    Abstract: A wheel loader includes a boom, a forward clutch, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for bringing the forward clutch into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.
    Type: Application
    Filed: August 10, 2017
    Publication date: September 24, 2020
    Applicant: KOMATSU LTD.
    Inventors: Ryota ENOMOTO, Masanori IKARI, Kentaro YAJIMA, Takuma NISHIMURA
  • Patent number: 10730549
    Abstract: An articulated work vehicle with linked front and rear frames includes a joystick lever, a force imparting component, a speed sensor, and a controller. The joystick lever is configured to change a steering angle of the front frame with respect to the rear frame by operation by an operator. The force imparting component is configured to impart an assist force or a counterforce to operation of the joystick lever by the operator. The speed sensor is configured to sense speed of the work vehicle. The controller is configured to control the force imparting component so as to impart the assist force or the counterforce according to the speed sensed by the speed sensor.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: August 4, 2020
    Assignee: KOMATSU LTD.
    Inventors: Yuita Takenaka, Masanobu Nakabayashi, Masanori Ikari
  • Publication number: 20200117026
    Abstract: A paramagnetic garnet-type transparent ceramic characterized by being a sintered body of a terbium-containing composite oxide represented by formula (1) in which the linear transmittance at a wavelength of 1,064 nm at an optical path length of 15 mm is 83% or higher. (Tb1-x-yScxCey)3(Al1-zScz)5O12??(1) (In the formula, 0<x<0.08, 0?y?0.01, 0.004<z<0.16.
    Type: Application
    Filed: April 4, 2018
    Publication date: April 16, 2020
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventor: Masanori Ikari
  • Patent number: 10562564
    Abstract: A work vehicle is articulated with a front frame and a rear frame linked to the front frame. The work vehicle includes a hydraulic actuator, a control valve, an operation member and a force imparting component. The hydraulic actuator is configured to be hydraulically driven to change a steering angle of the front frame with respect to the rear frame. The control valve is configured to control flow of fluid supplied to the hydraulic actuator. The operation member is linked to the control valve and configured to be operated by an operator. The force imparting component is configured to impart an assist force or a counterforce to an operation of the operation member.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: February 18, 2020
    Assignee: KOMATSU LTD.
    Inventors: Masanori Ikari, Masanobu Nakabayashi, Yuita Takenaka, Masahiko Hamaguchi, Jun Itou, Kenichi Muramoto
  • Patent number: 10550548
    Abstract: A wheel loader includes a forward clutch, an accelerator pedal, a brake pedal, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for reducing the hydraulic pressure of the hydraulic oil supplied to the forward clutch according to an operation amount of the brake pedal on condition that at least the brake pedal is operated while the accelerator pedal is being operated. The controller continues the clutch hydraulic pressure control even after the clutch shifts from a complete engagement state to a semi-engagement state by the clutch hydraulic pressure control.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: February 4, 2020
    Assignee: KOMATSU LTD.
    Inventors: Ryota Enomoto, Masanori Ikari, Kentaro Yajima, Takuma Nishimura
  • Patent number: 10526725
    Abstract: This invention provides a transparent magnetooptical material that is suitable for use in a magnetooptical device such as an optical isolator. Said magnetooptical material comprises either a transparent ceramic consisting primarily of a complex oxide that can be represented by formula (1) or a single crystal of such a complex oxide. Said magnetooptical material does not absorb fiber-laser light in the 0.9-1.1 ?m wavelength range, does not cause heat lensing, and has a higher Verdet constant than TGG crystals, with a Verdet constant of at least 0.14 min/(Oe·cm) at a wavelength of 1,064 nm. Tb2R2O7??(1) (In formula (1), R represents one or more elements selected from among the group consisting of silicon, germanium, titanium, tantalum, tin, hafnium, and zirconium (but not silicon only, germanium only, or tantalum only)).
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: January 7, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Masanori Ikari
  • Patent number: 10518803
    Abstract: An articulated work vehicle with linked front and rear frames includes a joystick lever, a hydraulic actuator, a control valve, a force imparting component, a joystick displacement sensor, a steering angle sensor, and a controller. The joystick lever is operated to allow a target steering angle to be set. The hydraulic actuator is driven hydraulically to change an actual steering angle. The control valve controls flow of fluid supplied to the hydraulic actuator to eliminate deviation between the target and actual steering angles. The force imparting component imparts an assist force or a counterforce to the operation of the joystick lever. The controller controls the force imparting component so that a counterforce is imparted to the operation of the joystick lever when the joystick lever has been operated in an opposite direction from a rotation direction of the front frame based on detections of the sensors.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: December 31, 2019
    Assignee: KOMATSU LTD.
    Inventors: Yuita Takenaka, Masanobu Nakabayashi, Masanori Ikari
  • Publication number: 20190366584
    Abstract: A slurry or slip composed of a dispersion medium and a dispersoid including sinterable raw material powder containing a complex oxide powder represented by the following formula (1): (Tb1-x-yRxScy)3(Al1-zScz)5O12??(1) wherein R is yttrium and/or lutetium, 0.05?x<0.45, 0<y<0.1, 0.5<1-x-y<0.95, and 0.004<z<0.2 is prepared; the slurry or slip is subsequently enclosed in a mold container to be subjected to solid-liquid separation by centrifugal casting to mold a cast compact; the cast compact is dried thereafter; a dried compact is degreased; a degreased compact is sintered thereafter; and a sintered body is further subjected to a hot isostatic pressing treatment to obtain the transparent ceramic material composed of the sintered body of garnet-type rare earth complex oxide represented by the formula (1).
    Type: Application
    Filed: May 29, 2019
    Publication date: December 5, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takuto Matsumoto, Masanori Ikari
  • Publication number: 20190359496
    Abstract: To a co-precipitating aqueous solution, aqueous solutions containing (a) Tb ions, (b) at least one other rare earth ions selected from the group consisting of Y ions and lanthanoid rare earth ions (excluding Tb ions), (c) Al ions and (d) Sc ions are added; the resulting solution is stirred at a liquid temperature of 50° C. or less to induce a co-precipitate of the components (a), (b), (c) and (d); the co-precipitate is filtered, heated and dehydrated; and the co-precipitate is fired thereafter at from 1,000° C. to 1,300° C., thereby forming a sinterable garnet-type complex oxide powder.
    Type: Application
    Filed: May 22, 2019
    Publication date: November 28, 2019
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Keita TANAKA, Masanori IKARI
  • Publication number: 20190360173
    Abstract: A work vehicle includes a steering wheel, a steering cylinder, a steering valve, a feed line, a return line, an electromagnetic valve, and a controller. The steering valve is configured to supply hydraulic fluid to the steering cylinder in response to steering of the steering wheel. The feed line is configured to feed the hydraulic fluid from the steering valve to the steering cylinder. The return line is configured to return the hydraulic fluid from the steering cylinder to the steering valve. The electromagnetic valve is disposed between the feed line and the return line. The controller opens the electromagnetic valve in response to an oil pressure in the feed line.
    Type: Application
    Filed: June 21, 2018
    Publication date: November 28, 2019
    Inventors: Keiichi HAYASHI, Masanori IKARI, Hirotaka KAMEKURA