Patents by Inventor Kazuma Aoki

Kazuma Aoki 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).

  • Publication number: 20250058436
    Abstract: An impact tool (1) includes: a motor (6) having a rotor (27) that is rotatable about a rotational axis (AX); a spindle (8) disposed forward of the stator and rotating when the rotor rotates; an anvil (10) having at least a portion disposed forward of the spindle and mounting a bit (300); a hammer (47), which rotatably impacts the anvil; and a housing (2), which has a motor-housing part (21) that houses the motor. The maximum tightening torque is 140 N·m or more. Overall length (La), which is the distance—in the front-rear direction parallel to the rotational axis—between a rear-end portion of the motor-housing part and a front-end portion of the anvil, is 100 mm or less. The hammer has a base portion, a front-side ring portion protruding forward from the base portion, and hammer projection portions protruding radially inward from the front ring portion.
    Type: Application
    Filed: October 7, 2024
    Publication date: February 20, 2025
    Inventors: Kazuma AOKI, Tomoro AOYAMA
  • Patent number: 12138753
    Abstract: An impact tool (1) includes: a motor (6) having a rotor (27) that is rotatable about a rotational axis (AX); a spindle (8) disposed forward of the stator and rotating when the rotor rotates; an anvil (10) having at least a portion disposed forward of the spindle and mounting a bit (300); a hammer (47), which rotatably impacts the anvil; and a housing (2), which has a motor-housing part (21) that houses the motor. The maximum tightening torque is 140 N·m or more. Overall length (La), which is the distance—in the front-rear direction parallel to the rotational axis—between a rear-end portion of the motor-housing part and a front-end portion of the anvil, is 100 mm or less. Center height Hc, which is the distance in the up-down direction between the rotational axis and an upper-end portion of the motor-housing part, is 29 mm or less.
    Type: Grant
    Filed: May 30, 2023
    Date of Patent: November 12, 2024
    Assignee: MAKITA CORPORATION
    Inventors: Kazuma Aoki, Tomoro Aoyama
  • Patent number: 12138752
    Abstract: To improve operability it is desireable to decrease the size of an impact tool. The impact tool includes a motor, a spindle including a spindle shaft and a flange. An anvil of the tool includes an anvil shaft and an anvil projection. A hammer of the tool includes a base surrounding the spindle shaft, a front ring protruding frontward from an outer circumference of the base, and a hammer projection to strike the anvil projection in a rotation direction. The base has a groove at a boundary with the hammer projection. One of ordinary skill in the art would appreciate that the arrangement disclosed herein results in space savings that allows for overall decrease in the size of an impact too.
    Type: Grant
    Filed: April 26, 2023
    Date of Patent: November 12, 2024
    Assignee: MAKITA CORPORATION
    Inventors: Kazuma Aoki, Tomoro Aoyama
  • Patent number: 12115625
    Abstract: An impact tool has less size increase. An impact tool includes a motor, a spindle, an anvil including an anvil shaft and an anvil projection, a hammer including a hammer projection to strike the anvil projection in a rotation direction, a hammer case accommodating the hammer, an anvil bearing held in the hammer case and surrounding the anvil shaft, and a cup washer facing a front surface of the anvil projection. The cup washer includes an inner ring portion in contact with a rear end face of the anvil bearing, an outer ring portion surrounding the anvil bearing, and a connecting ring portion connecting an outer edge of the inner ring portion and an inner edge of the outer ring portion.
    Type: Grant
    Filed: May 2, 2023
    Date of Patent: October 15, 2024
    Assignee: MAKITA CORPORATION
    Inventors: Kazuma Aoki, Tomoro Aoyama
  • Publication number: 20240208013
    Abstract: An impact tool includes: a brushless motor; a spindle, which is rotated by the brushless motor; a hammer, which is held on the spindle; an anvil, which is impacted in a rotational direction by the hammer, a polymer housing, which houses the brushless motor; a hammer case, which is connected to the polymer housing and houses the hammer and the spindle; and a light unit, which is held on the hammer case and comprises a plurality of light-emitting devices. The maximum tightening torque of the anvil is 1,000 N·m or more and 2,500 N·m or less.
    Type: Application
    Filed: March 8, 2024
    Publication date: June 27, 2024
    Inventors: Tokuo HIRABAYASHI, Haruki TEJIMA, Kazuma AOKI, Kazunori KINOSHITA
  • Patent number: 11958170
    Abstract: An impact tool includes: a brushless motor; a spindle, which is rotated by the brushless motor; a hammer, which is held on the spindle; an anvil, which is impacted in a rotational direction by the hammer; a polymer housing, which houses the brushless motor; a hammer case, which is connected to the polymer housing and houses the hammer and the spindle; and a light unit, which is held on the hammer case and comprises a plurality of light-emitting devices. The maximum tightening torque of the anvil is 1,000 N·m or more and 2,500 N·m or less.
    Type: Grant
    Filed: November 30, 2022
    Date of Patent: April 16, 2024
    Assignee: MAKITA CORPORATION
    Inventors: Tokuo Hirabayashi, Haruki Tejima, Kazuma Aoki, Kazunori Kinoshita
  • Publication number: 20230398663
    Abstract: An impact tool has less size increase. An impact tool includes a motor, a spindle, an anvil including an anvil shaft and an anvil projection, a hammer including a hammer projection to strike the anvil projection in a rotation direction, a hammer case accommodating the hammer, an anvil bearing held in the hammer case and surrounding the anvil shaft, and a cup washer facing a front surface of the anvil projection. The cup washer includes an inner ring portion in contact with a rear end face of the anvil bearing, an outer ring portion surrounding the anvil bearing, and a connecting ring portion connecting an outer edge of the inner ring portion and an inner edge of the outer ring portion.
    Type: Application
    Filed: May 2, 2023
    Publication date: December 14, 2023
    Applicant: MAKITA CORPORATION
    Inventors: Kazuma AOKI, Tomoro AOYAMA
  • Publication number: 20230398662
    Abstract: An impact tool has less size increase. An impact tool includes a motor, a spindle including a spindle shaft and a flange, an anvil including an anvil shaft and an anvil projection, and a hammer including a base surrounding the spindle shaft, a front ring protruding frontward from an outer circumference of the base, and a hammer projection to strike the anvil projection in a rotation direction. The base has a groove at a boundary with the hammer projection.
    Type: Application
    Filed: April 26, 2023
    Publication date: December 14, 2023
    Applicant: MAKITA CORPORATION
    Inventors: Kazuma AOKI, Tomoro AOYAMA
  • Publication number: 20230398665
    Abstract: An impact tool (1) includes: a motor (6) having a rotor (27) that is rotatable about a rotational axis (AX); a spindle (8) disposed forward of the stator and rotating when the rotor rotates; an anvil (10) having at least a portion disposed forward of the spindle and mounting a bit (300); a hammer (47), which rotatably impacts the anvil; and a housing (2), which has a motor-housing part (21) that houses the motor. The maximum tightening torque is 140 N·m or more. Overall length (La), which is the distance—in the front-rear direction parallel to the rotational axis—between a rear-end portion of the motor-housing part and a front-end portion of the anvil, is 100 mm or less. Center height Hc, which is the distance in the up-down direction between the rotational axis and an upper-end portion of the motor-housing part, is 29 mm or less.
    Type: Application
    Filed: May 30, 2023
    Publication date: December 14, 2023
    Inventors: Kazuma AOKI, Tomoro AOYAMA
  • Patent number: 11685260
    Abstract: A vehicle includes a display device that displays information indicating an operation state of an internal combustion engine. A display control device which is a control device that controls the display device includes an acquisition unit configured to acquire the operation state of the internal combustion engine. The display control device includes a display control unit that switches information which is displayed on the display device between a warm-up indicator for notifying that warm-up of the internal combustion engine is being performed and a warm-up completion indicator for notifying that warm-up of the internal combustion engine has been completed. The display control unit is configured to prohibit switching from the warm-up completion indicator to the warm-up indicator when the warm-up completion indicator is being displayed on the display device while the internal combustion engine is operating.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: June 27, 2023
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuma Aoki, Koji Hokoi, Yusuke Furuhashi
  • Publication number: 20230182270
    Abstract: An impact tool includes: a brushless motor; a spindle, which is rotated by the brushless motor; a hammer, which is held on the spindle; an anvil, which is impacted in a rotational direction by the hammer; a polymer housing, which houses the brushless motor; a hammer case, which is connected to the polymer housing and houses the hammer and the spindle; and a light unit, which is held on the hammer case and comprises a plurality of light-emitting devices. The maximum tightening torque of the anvil is 1,000 N·m or more and 2,500 N·m or less.
    Type: Application
    Filed: November 30, 2022
    Publication date: June 15, 2023
    Inventors: Tokuo HIRABAYASHI, Haruki TEJIMA, Kazuma AOKI, Kazunori KINOSHITA
  • Publication number: 20230182269
    Abstract: An impact tool includes: a brushless motor; a spindle, which is rotated by the brushless motor; a hammer, which is held on the spindle; an anvil, which is impacted in a rotational direction by the hammer; a polymer housing, which houses the brushless motor; a hammer case, which is connected to the polymer housing and houses the hammer and the spindle; and a light unit, which is held on the hammer case and comprises a plurality of light-emitting devices. The maximum tightening torque of the anvil is 1,000 N·m or more and 2,500 N·m or less.
    Type: Application
    Filed: November 30, 2022
    Publication date: June 15, 2023
    Inventors: Tokuo HIRABAYASHI, Haruki TEJIMA, Kazuma AOKI, Kazunori KINOSHITA
  • Patent number: 11242046
    Abstract: A control system for a hybrid vehicle configured to prevent a reduction in the purifying performance of the catalyst in a predetermined operating mode. An operating mode of the hybrid vehicle can be selected from a first hybrid vehicle mode, a second hybrid vehicle mode, and a fixed mode. A controller that is configured to restrict a shifting operation between the first hybrid vehicle mode and the second hybrid vehicle mode via the fixed mode, when the purifying device is being warmed or the purifying device has to be warmed.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: February 8, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Kazuma Aoki, Yasuhiro Oshiumi, Yukari Okamura
  • Publication number: 20210221226
    Abstract: A vehicle includes a display device that displays information indicating an operation state of an internal combustion engine. A display control device which is a control device that controls the display device includes an acquisition unit configured to acquire the operation state of the internal combustion engine. The display control device includes a display control unit that switches information which is displayed on the display device between a warm-up indicator for notifying that warm-up of the internal combustion engine is being performed and a warm-up completion indicator for notifying that warm-up of the internal combustion engine has been completed. The display control unit is configured to prohibit switching from the warm-up completion indicator to the warm-up indicator when the warm-up completion indicator is being displayed on the display device while the internal combustion engine is operating.
    Type: Application
    Filed: October 29, 2020
    Publication date: July 22, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuma AOKI, Koji HOKOI, Yusuke FURUHASHI
  • Patent number: 11015542
    Abstract: A plug-in hybrid vehicle of the present disclosure includes an internal combustion engine, a particulate filter configured to collect particulate matter in exhaust gas of the internal combustion engine, an electric motor that outputs a driving force and a regenerative braking force to a wheel, a power storage device that exchanges electric power with the electric motor and is chargeable with electric power from an external power supply, and a controller programmed to decrease a target SOC for charging the power storage device with the electric power from the external power supply when a deposition amount of the particulate matter in the particulate filter is more than a predetermined value, compared to when the deposition amount of the particulate matter in the particulate filter is equal to or less than the predetermined value.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: May 25, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuma Aoki, Koji Hokoi, Yu Nakao, Kohichiroh Yonemura, Yusuke Furuhashi
  • Patent number: 11007997
    Abstract: A control system for preventing engine stall due to slippage of a wheel during propulsion in a fixed mode in which an engine and the wheel are rotated at a fixed ratio. When a wheel slips in a first mode in which an engine and the wheel are rotated at a predetermined ratio, an operating mode is shifted to a second mode in which a torque transmission between the engine and the wheel is interrupted and the vehicle is propelled by torque of driving machine connected to the wheel, or to a third mode in which the vehicle is propelled by delivering torque of the engine to the wheel while establishing a reaction torque by a predetermined rotary member.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: May 18, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yukari Okamura, Yasuhiro Oshiumi, Tatsuya Imamura, Kazuma Aoki
  • Patent number: 11001251
    Abstract: During a hybrid drive, a hybrid vehicle sets an engine required power based on a driving required power and controls an engine to output the engine required power, while controlling a motor to drive the hybrid vehicle with the driving required power. When a catalyst temperature of an exhaust emission control device is equal to or lower than a predetermined temperature that requires warming up, in the state that an output upper limit power which a power storage device is allowed to output is equal to or larger than a predetermined power, the hybrid vehicle sets a power calculated by subtracting the output upper limit power from the driving required power, to the engine required power. In the state that the output upper limit power is smaller than the predetermined power, the hybrid vehicle sets the driving required power to the engine required power.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 11, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideki Kamatani, Kazuma Aoki, Koji Hokoi
  • Patent number: 10955050
    Abstract: A drive control device for a vehicle is configured: to determine whether or not a sound pressure level inside a vehicle cabin becomes a predetermined value or less, under a state where it is predicted that a meshing-type engagement mechanism is changed from a disengaged state to an engaged state; and to prohibit the meshing-type engagement mechanism from entering the disengaged state, when it is determined that the sound pressure level becomes the predetermined value or less. In the disengaged state, transmission of a power output from a driving force source to driving wheels as drive energy is interrupted.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: March 23, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsuya Imamura, Yasuhiro Oshiumi, Kazuma Aoki, Yukari Okamura
  • Patent number: 10946853
    Abstract: A control system for hybrid vehicles to prevent a reduction in a brake force when an electrical input to a battery is restricted. A controller is configured to execute a regeneration control to deliver a regenerative torque resulting from operating second motor as a generator to the drive wheels, and an engine brake control to deliver a brake torque resulting from a power loss of an engine to the output member. The controller is further configured to select an HV-Lo mode when an input power allowed to accumulate in the battery is smaller than a threshold power.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: March 16, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuma Aoki, Tatsuya Imamura, Yasuhiro Oshiumi, Yukari Okamura
  • Patent number: 10850600
    Abstract: A drive force control system for hybrid vehicles to prevent a reduction in drive force during reverse propulsion while operating an engine. An operating mode of a transmission mechanism can be selected from a first mode in which the output torque of the engine is delivered to the output member at a first predetermined ratio and a second mode in which the output torque of the engine is delivered to the output member at a second predetermined ratio that is smaller than the first predetermined ratio. A controller is configured to restrict selection of the first mode when the engine generates a power greater than a predetermined power during propulsion of the hybrid vehicle in the reverse direction.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: December 1, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yukari Okamura, Tatsuya Imamura, Yasuhiro Oshiumi, Kazuma Aoki