Patents by Inventor Ryousuke ITOU

Ryousuke ITOU 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: 12584295
    Abstract: The present invention aims to provide a working machine capable of improving the responsiveness of the driving speed to the target speed of the hydraulic actuator. For this purpose, the controller calculates the target speed of the boom according to the input amount of the operation lever, calculates the actuator target flow rate based on the target speed, calculates the pump target flow rate based on the actuator target flow rate, and based on the input amount of the operation lever, the output value of the inertia measuring device, and the meter-out pressure of the actuator, calculates the target meter-in pressure, which is the target value of the actuator's meter-in pressure, calculates the difference between the driving speed of the boom and the target speed as a speed error, calculates the difference between the meter-in pressure and the target meter-in pressure as a pressure error, and corrects the pump target flow rate according to the speed error and the pressure error.
    Type: Grant
    Filed: March 10, 2023
    Date of Patent: March 24, 2026
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Ryousuke Itou, Hiroaki Amano, Kento Kumagai, Shinji Nishikawa, Akihiro Narazaki
  • Publication number: 20260062885
    Abstract: The present invention provides a work machine that can improve the accuracy of control to limit the operation of the work device within a predetermined range. The excavator includes a control valve that controls the flow of pressure oil to the boom hydraulic cylinder, multiple pilot solenoid valves that generate and output pilot pressure to operate the control valve, a controller with a limiting function that controls the multiple pilot solenoid valves to restrict the operation of the work device to a predetermined range, anti-drop valves with an anti-drop function to prevent the boom from falling, and solenoid valves that output release pressure to release the anti-drop function of the anti-drop valves. The controller calculates the release pressure for the anti-drop valves based on information related to the limiting function and controls the solenoid valves to output the calculated release pressure to the anti-drop valves as a signal to release the anti-drop function.
    Type: Application
    Filed: February 2, 2024
    Publication date: March 5, 2026
    Inventors: Teruki IGARASHI, Ryouhei FUKUCHI, Shouta ISHIDA, Ryousuke ITOU, Akihiro NARAZAKI
  • Publication number: 20250357314
    Abstract: A memory device includes an alternating stack of insulating layers and electrically conductive layers that alternate along a vertical direction, memory openings vertically extending through the alternating stack in a memory array region, memory opening fill structures located in the memory openings and including a respective vertical stack of memory elements and a respective vertical semiconductor channel, and layer contact via structures contacting the electrically conductive layers. Each electrically conductive layer within a subset of the electrically conductive layers includes a respective tab portion that laterally protrudes away from the memory array region relative to a respective underlying vertically-neighboring electrically conductive layer and relative to a respective overlying vertically-neighboring electrically conductive layer, and a subset of the layer contact via structures contacts a top surface of a respective one of the tab portions.
    Type: Application
    Filed: May 15, 2024
    Publication date: November 20, 2025
    Inventors: Airi YAMATE, Ryousuke ITOU, Yuki FUKUSHIGE, Tomohiro ASANO, Youko FURIHATA
  • Publication number: 20250263909
    Abstract: The present invention aims to provide a working machine capable of improving the responsiveness of the driving speed to the target speed of the hydraulic actuator. For this purpose, the controller calculates the target speed of the boom according to the input amount of the operation lever, calculates the actuator target flow rate based on the target speed, calculates the pump target flow rate based on the actuator target flow rate, and based on the input amount of the operation lever, the output value of the inertia measuring device, and the meter-out pressure of the actuator, calculates the target meter-in pressure, which is the target value of the actuator's meter-in pressure, calculates the difference between the driving speed of the boom and the target speed as a speed error, calculates the difference between the meter-in pressure and the target meter-in pressure as a pressure error, and corrects the pump target flow rate according to the speed error and the pressure error.
    Type: Application
    Filed: March 10, 2023
    Publication date: August 21, 2025
    Inventors: Ryousuke ITOU, Hiroaki AMANO, Kento KUMAGAI, Shinji NISHIKAWA, Akihiro NARAZAKI
  • Patent number: 12320097
    Abstract: A controller of a work machine computes a requested velocity of a hydraulic actuator based on an operation signal, computes a first estimated velocity of the hydraulic actuator based on a sensed value of a first sensing device that senses motion information of a driven member, computes a second estimated velocity of the hydraulic actuator based on a sensed value of a second sensing device that senses a flow rate of a directional control valve, computes an arbitrated velocity by arbitrating the first estimated velocity and the second estimated velocity according to a driving state of the hydraulic actuator, and controls the directional control valve based on a deviation between the requested velocity and the arbitrated velocity.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: June 3, 2025
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Naoya Takagawa, Kento Kumagai, Mitsuhiko Kanehama, Hiroaki Amano, Ryousuke Itou
  • Patent number: 12225720
    Abstract: A vertically alternating sequence of continuous insulating layers and continuous sacrificial material layers is formed over a substrate, and memory opening fill structures including vertical stacks of memory elements are formed through the vertically alternating sequence. Backside trenches are formed to divide the vertically alternating sequence into a plurality of alternating stacks of insulating layers and sacrificial material layers. Bridge structures are formed within each of the backside trenches. The sacrificial material layers are replaced with electrically conductive layers while the bridge structure are present within the backside trenches.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: February 11, 2025
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Ryousuke Itou, Akihisa Sai, Kenzo Iizuka
  • Patent number: 12193228
    Abstract: A memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening. The memory opening fill structure includes a memory film and a vertical semiconductor channel. The memory film includes a tunneling dielectric layer, a charge storage layer that laterally surrounds the tunneling dielectric layer, a dielectric metal oxide blocking dielectric layer that laterally surrounds the charge storage layer and contacts the vertical semiconductor channel, and a silicon oxide blocking dielectric layer that laterally surrounds the dielectric metal oxide blocking dielectric layer and contacts the vertical semiconductor channel.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: January 7, 2025
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Noriyuki Nagahata, Takashi Yuda, Ryousuke Itou
  • Patent number: 12178040
    Abstract: A vertically alternating sequence of continuous insulating layers and continuous sacrificial material layers is formed over a substrate, and memory opening fill structures including vertical stacks of memory elements are formed through the vertically alternating sequence. Backside trenches are formed to divide the vertically alternating sequence into a plurality of alternating stacks of insulating layers and sacrificial material layers. A set of one or more bridge structures including a doped semiconductor material is formed within each of the backside trenches. The sacrificial material layers are replaced with electrically conductive layers while the sets of at least one bridge structure are present within the backside trenches.
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: December 24, 2024
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Ryousuke Itou, Akihisa Sai, Kenzo Iizuka
  • Patent number: 12101936
    Abstract: A method of forming a three-dimensional memory device includes forming an alternating stack of insulating layers and sacrificial material layers over a substrate, forming a memory opening extending through the alternating stack, forming a sacrificial memory opening fill structure in the memory opening, replacing the sacrificial material layers with electrically conductive layers, removing the sacrificial memory opening fill structure selective to the electrically conductive layers, and forming a memory opening fill structure the memory opening after replacing the sacrificial material layers with electrically conductive layers and after removing the sacrificial memory opening fill structure. The memory opening fill structure includes a memory film and a vertical semiconductor channel.
    Type: Grant
    Filed: November 10, 2021
    Date of Patent: September 24, 2024
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Tatsuya Hinoue, Yusuke Mukae, Ryousuke Itou, Masanori Tsutsumi, Akio Nishida, Ramy Nashed Bassely Said
  • Publication number: 20240151003
    Abstract: A controller of a work machine computes a requested velocity of a hydraulic actuator based on an operation signal, computes a first estimated velocity of the hydraulic actuator based on a sensed value of a first sensing device that senses motion information of a driven member, computes a second estimated velocity of the hydraulic actuator based on a sensed value of a second sensing device that senses a flow rate of a directional control valve, computes an arbitrated velocity by arbitrating the first estimated velocity and the second estimated velocity according to a driving state of the hydraulic actuator, and controls the directional control valve based on a deviation between the requested velocity and the arbitrated velocity.
    Type: Application
    Filed: March 11, 2022
    Publication date: May 9, 2024
    Inventors: Naoya TAKAGAWA, Kento KUMAGAI, Mitsuhiko KANEHAMA, Hiroaki AMANO, Ryousuke ITOU
  • Patent number: 11732441
    Abstract: There is provided a construction machine that draws attention from the surroundings of the machine body when the prime mover is started and that can have the operator reliably confirm the surroundings of the machine body before the prime mover is started. An engine start control section 23 of a main controller 22 inhibits an engine 18 from starting when a key switch 12 is operated while a horn switch 21 is not operated, inhibits the engine 18 from starting when the key switch 12 is operated for the duration until a first set time T1 elapses after the operation of the horn switch 21 has been finished, permits the engine 18 to start in a case the key switch 12 is operated for the duration until a second set time T2 elapses after the first set time T1 has elapsed, and inhibits the engine 18 again from starting when the key switch 12 is operated if the engine 18 is not started for the duration until the second set time T2 elapses.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: August 22, 2023
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Shinji Nishikawa, Ryousuke Itou, Katsuaki Kodaka
  • Publication number: 20230055230
    Abstract: A vertically alternating sequence of continuous insulating layers and continuous sacrificial material layers is formed over a substrate, and memory opening fill structures including vertical stacks of memory elements are formed through the vertically alternating sequence. Backside trenches are formed to divide the vertically alternating sequence into a plurality of alternating stacks of insulating layers and sacrificial material layers. Bridge structures are formed within each of the backside trenches. The sacrificial material layers are replaced with electrically conductive layers while the bridge structure are present within the backside trenches.
    Type: Application
    Filed: November 19, 2021
    Publication date: February 23, 2023
    Inventors: Ryousuke ITOU, Akihisa SAI, Kenzo IIZUKA
  • Publication number: 20230057885
    Abstract: A vertically alternating sequence of continuous insulating layers and continuous sacrificial material layers is formed over a substrate, and memory opening fill structures including vertical stacks of memory elements are formed through the vertically alternating sequence. Backside trenches are formed to divide the vertically alternating sequence into a plurality of alternating stacks of insulating layers and sacrificial material layers. A set of one or more bridge structures including a doped semiconductor material is formed within each of the backside trenches. The sacrificial material layers are replaced with electrically conductive layers while the sets of at least one bridge structure are present within the backside trenches.
    Type: Application
    Filed: August 19, 2021
    Publication date: February 23, 2023
    Inventors: Ryousuke ITOU, Akihisa SAI, Kenzo IIZUKA
  • Patent number: 11532570
    Abstract: A three-dimensional memory device includes a first word-line region including a first alternating stack of first word lines and continuous insulating layers, first memory stack structures vertically extending through the first alternating stack, a second word-line region comprising a second alternating stack of second word lines and the continuous insulating layers, second memory stack structures vertically extending through the second alternating stack, plural dielectric separator structures located between the first word-line region and the second word-line region, and at least one bridge region located between the plural dielectric separator structures and between the between the first word-line region and the second word-line region. The continuous insulating layers extend through the at least one bridge region between the first alternating stack in the first word-line region and the second alternating stack in the second word-line region.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: December 20, 2022
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Genta Mizuno, Kenzo Iizuka, Satoshi Shimizu, Keisuke Izumi, Tatsuya Hinoue, Yujin Terasawa, Seiji Shimabukuro, Ryousuke Itou, Yanli Zhang, Johann Alsmeier, Yusuke Yoshida
  • Publication number: 20220352201
    Abstract: A method of forming a three-dimensional memory device includes forming an alternating stack of insulating layers and sacrificial material layers over a substrate, forming a memory opening extending through the alternating stack, forming a sacrificial memory opening fill structure in the memory opening, replacing the sacrificial material layers with electrically conductive layers, removing the sacrificial memory opening fill structure selective to the electrically conductive layers, and forming a memory opening fill structure the memory opening after replacing the sacrificial material layers with electrically conductive layers and after removing the sacrificial memory opening fill structure. The memory opening fill structure includes a memory film and a vertical semiconductor channel.
    Type: Application
    Filed: November 10, 2021
    Publication date: November 3, 2022
    Inventors: Tatsuya HINOUE, Yusuke MUKAE, Ryousuke ITOU, Masanori TSUTSUMI, Akio NISHIDA, Ramy Nashed Bassely SAID
  • Publication number: 20220254733
    Abstract: A three-dimensional memory device includes a first word-line region including a first alternating stack of first word lines and continuous insulating layers, first memory stack structures vertically extending through the first alternating stack, a second word-line region comprising a second alternating stack of second word lines and the continuous insulating layers, second memory stack structures vertically extending through the second alternating stack, plural dielectric separator structures located between the first word-line region and the second word-line region, and at least one bridge region located between the plural dielectric separator structures and between the between the first word-line region and the second word-line region. The continuous insulating layers extend through the at least one bridge region between the first alternating stack in the first word-line region and the second alternating stack in the second word-line region.
    Type: Application
    Filed: February 11, 2021
    Publication date: August 11, 2022
    Inventors: Genta MIZUNO, Kenzo IIZUKA, Satoshi SHIMIZU, Keisuke IZUMI, Tatsuya HINOUE, Yujin TERASAWA, Seiji SHIMABUKURO, Ryousuke ITOU, Yanli ZHANG, Johann ALSMEIER, Yusuke YOSHIDA
  • Publication number: 20220109003
    Abstract: A memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening. The memory opening fill structure includes a memory film and a vertical semiconductor channel. The memory film includes a tunneling dielectric layer, a charge storage layer that laterally surrounds the tunneling dielectric layer, a dielectric metal oxide blocking dielectric layer that laterally surrounds the charge storage layer and contacts the vertical semiconductor channel, and a silicon oxide blocking dielectric layer that laterally surrounds the dielectric metal oxide blocking dielectric layer and contacts the vertical semiconductor channel.
    Type: Application
    Filed: October 7, 2020
    Publication date: April 7, 2022
    Inventors: Noriyuki NAGAHATA, Takashi YUDA, Ryousuke ITOU
  • Publication number: 20210348362
    Abstract: There is provided a construction machine that draws attention from the surroundings of the machine body when the prime mover is started and that can have the operator reliably confirm the surroundings of the machine body before the prime mover is started. An engine start control section 23 of a main controller 22 inhibits an engine 18 from starting when a key switch 12 is operated while a horn switch 21 is not operated, inhibits the engine 18 from starting when the key switch 12 is operated for the duration until a first set time T1 elapses after the operation of the horn switch 21 has been finished, permits the engine 18 to start in a case the key switch 12 is operated for the duration until a second set time T2 elapses after the first set time T1 has elapsed, and inhibits the engine 18 again from starting when the key switch 12 is operated if the engine 18 is not started for the duration until the second set time T2 elapses.
    Type: Application
    Filed: January 15, 2020
    Publication date: November 11, 2021
    Inventors: Shinji NISHIKAWA, Ryousuke ITOU, Katsuaki KODAKA
  • Patent number: 11018152
    Abstract: First memory openings are formed through a first alternating stack of first insulating layers and first spacer material layers. Each first memory opening is filled with a first memory film, a sacrificial dielectric liner, and a first-tier opening fill material portion. Second memory openings are formed through a second alternating stack of second insulating layers and second spacer material layers. A second memory film is formed in each second memory opening. The first-tier opening fill material portions are removed selective to the sacrificial dielectric liners. The sacrificial dielectric liners are removed selective to the second memory films and the first memory films. A vertical semiconductor channel can be formed on each vertical stack of a first memory film and a second memory film.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: May 25, 2021
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Tatsuya Hinoue, Kengo Kajiwara, Ryousuke Itou, Naohiro Hosoda
  • Patent number: 9754999
    Abstract: A method is provided that includes forming a transistor by forming a gate disposed in a first direction above a substrate, the gate including a first bridge portion and a second bridge portion, forming the first bridge portion extending in the first direction and disposed near a top of the gate, and forming the second bridge portion extending in the first direction and disposed near a bottom of the gate.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: September 5, 2017
    Assignee: SanDisk Technologies LLC
    Inventors: Seje Takaki, Manabu Hayashi, Ryousuke Itou, Takuro Maede, Kengo Kajiwara, Tetsuya Yamada, Yusuke Oda