Patents by Inventor Yoshiro Tada

Yoshiro Tada 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: 11972071
    Abstract: According to one embodiment, a lateral-electric-field liquid crystal display device includes a light-emitting display layer including OLEDs and a driving circuit controlling light emission of the OLEDs, a moisture impermeable film provided to be laminated on the light-emitting display layer to prevent infiltration of moisture into the light-emitting display layer, an optical substrate provided separately from the moisture impermeable film and subjecting light from the light-emitting display region to optical processing, a first touch electrode group serving as one electrode group of touch electrodes and provided on a back surface of the optical substrate, and an extraction electrode group formed to be laminated on the moisture impermeable film, the extraction electrode group and the optical substrate have an overlapping part in plan view, and electrodes of the first touch electrode group being electrically connected to electrodes of the extraction electrode group in the overlapping part.
    Type: Grant
    Filed: May 9, 2023
    Date of Patent: April 30, 2024
    Assignee: Japan Display Inc.
    Inventors: Yoshiro Aoki, Takashi Nakamura, Masahiro Tada, Hirotaka Hayashi, Makoto Shibusawa, Yutaka Umeda, Miyuki Ishikawa
  • Publication number: 20240116161
    Abstract: A power tool includes a motor, a driving mechanism, a main housing, a handle housing, a first guide part and a second guide part. The handle housing is movable relative to the main housing at least in a front-rear direction. The first and second guide parts are configured to guide relative sliding between the main housing and the handle housing in the front-rear direction. Each of the first guide part and the second guide part includes a first engagement part and a second engagement part engaged with each other to be slidable in the front-rear direction. The main housing has the first engagement part. The handle housing has the second engagement part. The second guide part is spaced apart from the first guide part and located rearward of the first guide part in the front-rear direction.
    Type: Application
    Filed: December 18, 2023
    Publication date: April 11, 2024
    Applicant: MAKITA CORPORATION
    Inventors: Kiyonobu YOSHIKANE, Yoshiro Tada
  • Patent number: 11926030
    Abstract: A power tool includes a motor, a driving mechanism, a main housing, a handle housing, a first guide part and a second guide part. The handle housing is movable relative to the main housing at least in a front-rear direction. The first and second guide parts are configured to guide relative sliding between the main housing and the handle housing in the front-rear direction. Each of the first guide part and the second guide part includes a first engagement part and a second engagement part engaged with each other to be slidable in the front-rear direction. The main housing has the first engagement part. The handle housing has the second engagement part. The second guide part is spaced apart from the first guide part and located rearward of the first guide part in the front-rear direction.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: March 12, 2024
    Assignee: MAKITA CORPORATION
    Inventors: Kiyonobu Yoshikane, Yoshiro Tada
  • Patent number: 11780069
    Abstract: A dust collecting system includes a power tool and a dust collector. The power tool is configured to perform processing operation on a workpiece by driving a tool accessory. The dust collector is configured to collect dust generated by the processing operation. The power tool includes a first motor and a driving mechanism configured to drive the tool accessory by power of the first motor. The dust collector includes a second motor and a fan configured to be rotationally driven by the second motor to generate air flow for collecting dust. The dust collecting system includes a first control device configured to control a rotation speed of the second motor according to a driving state of the power tool.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: October 10, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Hitoshi Iida, Yoshiro Tada, Hideki Tsuji, Taro Hisano
  • Patent number: 11679482
    Abstract: A power tool includes a motor, a housing, a battery holder and a cushion. The battery holder is held by the housing to be movable at least in a first direction relative to the housing. The battery holder is configured to removably receive a battery for supplying electric power to the motor. The cushion is held by the housing such that the first direction intersects the cushion. When the battery is attached to the battery holder, the cushion is directly or indirectly disposed between the battery and the housing.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: June 20, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Masanori Furusawa, Hajime Takeuchi, Hideki Tsuji, Yoshiro Tada
  • Publication number: 20230173652
    Abstract: A power tool, such as a hammer drill (100), has first and second battery mount parts (160A, 160B) that are aligned in a longitudinal direction of the power tool. First and second batteries (170A, 170B) are mountable thereon in series along a straight line that extends in the longitudinal direction. The first battery (170A) is mounted on the first battery mount part (160A) by sliding along the straight line towards the second battery mount part (160B). The second battery (170B) is mounted on the second battery mount part (170B) by sliding along the straight line towards the first battery mount part (170A).
    Type: Application
    Filed: January 31, 2023
    Publication date: June 8, 2023
    Inventors: Kiyonobu YOSHIKANE, Hajime TAKEUCHI, Yoshiro TADA, Masanori FURUSAWA, Masao MIWA, Shinji ONODA, Yoshitaka MACHIDA
  • Patent number: 11597068
    Abstract: A power tool (100) comprises a motor (110) operably driving a tool bit (119), a tool body (101) housing the motor (110), a handle (109) coupled to the tool body (101), and at least two battery mount parts (160 A, 160B) defined on the handle (109) and/or the tool body (101). Each of the battery mount parts (160 A, 160B) comprises a battery engaging part (161) configured to detachably engage with battery packs (170 A, 170B) by sliding the battery packs (170 A, 170B) relative to the battery engaging part (161) in a direction perpendicular to the longitudinal direction of the tool bit (119). In a state in which at least one of the battery packs (170 A, 170B) is mounted on at least one of the battery mount parts (160 A, 160B), a length of the mounted battery in a driving axis extending direction is shorter than a length of the mounted battery in a cross direction.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: March 7, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Kiyonobu Yoshikane, Hajime Takeuchi, Yoshiro Tada, Masanori Furusawa, Masao Miwa, Shinji Onoda, Yoshitaka Machida
  • Patent number: 11491598
    Abstract: A dust collecting system includes a power tool and a stationary dust collector. The power tool is configured to perform processing operation on a workpiece by driving a tool accessory. The stationary dust collector is configured to be placed separately from the power tool and to collect dust generated by the processing operation. The power tool includes a first motor and a driving mechanism configured to drive the tool accessory by power of the first motor. The dust collector includes a second motor and a fan configured to be rotationally driven by the second motor to generate air flow for collecting dust. The dust collecting system includes a control device configured to control a rotation speed of the second motor according to a driving state of the power tool.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: November 8, 2022
    Assignee: MAKITA CORPORATION
    Inventors: Hitoshi Iida, Yoshiro Tada, Hideki Tsuji, Taro Hisano
  • Patent number: 11420314
    Abstract: An impact tool includes a switch for driving the tool accessory, an operation member configured to be movable between an OFF position and an ON position, a first lock member configured to lock the operation member in the ON position, a second lock member configured to be movable between a lock position and a lock-release position in response to an external operation by a user, and a holding mechanism configured to hold the second lock member in the lock position and also in the lock-release position. The second lock member in the lock position is capable of locking the operation member in the OFF position, and the second lock member in the lock-release position is incapable of locking the operation member in the OFF position.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: August 23, 2022
    Assignee: MAKITA CORPORATION
    Inventors: Yoshiro Tada, Kei Watanabe, Tetsuhisa Kaneko
  • Publication number: 20220055198
    Abstract: A power tool includes a motor, a driving mechanism, a main housing, a handle housing, a first guide part and a second guide part. The handle housing is movable relative to the main housing at least in a front-rear direction. The first and second guide parts are configured to guide relative sliding between the main housing and the handle housing in the front-rear direction. Each of the first guide part and the second guide part includes a first engagement part and a second engagement part engaged with each other to be slidable in the front-rear direction. The main housing has the first engagement part. The handle housing has the second engagement part. The second guide part is spaced apart from the first guide part and located rearward of the first guide part in the front-rear direction.
    Type: Application
    Filed: August 9, 2021
    Publication date: February 24, 2022
    Applicant: MAKITA CORPORATION
    Inventors: Kiyonobu YOSHIKANE, Yoshiro TADA
  • Publication number: 20220055197
    Abstract: A drilling tool includes a motor, a tool holder, a main housing, an elongate grip part, a hollow connection part and a detection device. The motor includes a motor shaft rotatable around a first axis. The tool holder is configured to be rotationally driven around a second axis extending parallel to the first axis and defining a front-rear direction. The grip part is behind the main housing and extends in a direction crossing the second axis. The grip part includes a first end portion located on the second axis and a second end portion spaced apart from the second axis. The connection part connects the second end portion and the main housing. The connection part and the grip part together form an annular part. The detection device is disposed in the connection part and configured to detect a rotation state of the main housing around the second axis.
    Type: Application
    Filed: August 9, 2021
    Publication date: February 24, 2022
    Applicant: MAKITA CORPORATION
    Inventors: Kiyonobu YOSHIKANE, Yoshiro TADA
  • Publication number: 20210402584
    Abstract: A power tool (100) comprises a motor (110) operably driving a tool bit (119), a tool body (101) housing the motor (110), a handle (109) coupled to the tool body (101), and at least two battery mount parts (160A, 160B) defined on the handle (109) and/or the tool body (101). Each of the battery mount parts (160A, 160B) comprises a battery engaging part (161) configured to detachably engage with battery packs (170A, 170B) by sliding the battery packs (170A, 170B) relative to the battery engaging part (161) in a direction perpendicular to the longitudinal direction of the tool bit (119). In a state in which at least one of the battery packs (170A, 170B) is mounted on at least one of the battery mount parts (160A, 160B), a length of the mounted battery in a driving axis extending direction is shorter than a length of the mounted battery in a cross direction.
    Type: Application
    Filed: September 13, 2021
    Publication date: December 30, 2021
    Inventors: Kiyonobu YOSHIKANE, Hajime TAKEUCHI, Yoshiro TADA, Masanori FURUSAWA, Masao MIWA, Shinji ONODA, Yoshitaka MACHIDA
  • Publication number: 20210370549
    Abstract: A power tool reduces the cost of a switch suitable for a power tool including a brushless motor and improves the operability of the switch. A power tool includes a brushless motor, a switch body that enters an on-state in response to an on-operation, and enters an off-state in response to the on-operation being released, an on-operation portion operable to perform the on-operation of the switch body, and an on-state retainer automatically engageable with the on-operation portion in response to an operation on the on-operation portion to retain the on-operation portion at a position to which the on-operation portion is operated.
    Type: Application
    Filed: October 17, 2019
    Publication date: December 2, 2021
    Applicant: MAKITA CORPORATION
    Inventors: Kiyonobu YOSHIKANE, Yoshiro TADA
  • Patent number: 11148272
    Abstract: A power tool (100) comprises a motor (110) operably driving a tool bit (119), a tool body (101) housing the motor (110), a handle (109) coupled to the tool body (101), and at least two battery mount parts (160A, 160B) defined on the handle (109) and/or the tool body (101). Each of the battery mount parts (160A, 160B) comprises a battery engaging part (161) configured to detachably engage with battery packs (170A, 170B) by sliding the battery packs (170A, 170B) relative to the battery engaging part (161) in a direction perpendicular to the longitudinal direction of the tool bit (119).
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: October 19, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Kiyonobu Yoshikane, Hajime Takeuchi, Yoshiro Tada, Masanori Furusawa, Masao Miwa, Shinji Onoda, Yoshitaka Machida
  • Publication number: 20210283758
    Abstract: A power tool includes a motor, a housing, a battery holder and a cushion. The battery holder is held by the housing to be movable at least in a first direction relative to the housing. The battery holder is configured to removably receive a battery for supplying electric power to the motor. The cushion is held by the housing such that the first direction intersects the cushion. When the battery is attached to the battery holder, the cushion is directly or indirectly disposed between the battery and the housing.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 16, 2021
    Applicant: MAKITA CORPORATION
    Inventors: Masanori FURUSAWA, Hajime TAKEUCHI, Hideki TSUJI, Yoshiro TADA
  • Patent number: 11052525
    Abstract: A hammer drill includes a housing, a tool holder, a hammering member, a gear, and a conversion member. The gear is switched to a first state where a rotation of the intermediate shaft is transmitted and a second state where the rotation of the intermediate shaft is not transmitted, and a mode switching member is configured to perform a switching operation of the state of the gear from an outside of the housing. The switching of the state of the gear by the mode switching member provides at least two operation modes of a hammer drill mode where the gear integrally rotates with the intermediate shaft to generate the rotation and a reciprocation of the hammering member on the tool holder and a hammer mode where the gear is separated from the rotation of the intermediate shaft to generate only the reciprocation of the hammering member.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: July 6, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Masanori Furusawa, Keita Mori, Yoshiro Tada
  • Patent number: 10987792
    Abstract: An impact tool includes a tubular tool holder, a hammering mechanism, a resistor, and a biasing member. An impact element moves forward and rearward in conjunction with a piston. An intermediate element is housed movable back and forth between the impact element and a tip tool. The intermediate element abuts on a rear end of the tip tool to indirectly transmit a striking force from the impact element to the tip tool in a normal striking. The resistor is configured to abut on at least one of the intermediate element and the tip tool to apply a resistance to a front-rear movement of at least one of the intermediate element and the tip tool in a non-striking state. The biasing member disposed on the tool holder biases the resistor to a side of at least one of the intermediate element and the tip tool.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: April 27, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Kiyonobu Yoshikane, Yoshiro Tada, Mizuki Yamamoto
  • Publication number: 20200306669
    Abstract: The filter can receive timely dust removal in a reliable manner. A dust collection attachment connectable to a hammer drill includes a dust collection motor that generates a suction force, a filter that catches sucked dust, a solenoid that removes dust accumulating on the filter, and a dust collection controller that controls an operation of the dust collection motor and the solenoid and activates the solenoid when a predetermined condition is satisfied.
    Type: Application
    Filed: February 13, 2020
    Publication date: October 1, 2020
    Applicant: MAKITA CORPORATION
    Inventors: Yoshiro TADA, Masanori FURUSAWA
  • Publication number: 20200306907
    Abstract: A dust collecting system includes a power tool and a stationary dust collector. The power tool is configured to perform processing operation on a workpiece by driving a tool accessory. The stationary dust collector is configured to be placed separately from the power tool and to collect dust generated by the processing operation. The power tool includes a first motor and a driving mechanism configured to drive the tool accessory by power of the first motor. The dust collector includes a second motor and a fan configured to be rotationally driven by the second motor to generate air flow for collecting dust. The dust collecting system includes a control device configured to control a rotation speed of the second motor according to a driving state of the power tool.
    Type: Application
    Filed: March 26, 2020
    Publication date: October 1, 2020
    Applicant: MAKITA CORPORATION
    Inventors: Hitoshi IIDA, Yoshiro TADA, Hideki TSUJI, Taro HISANO
  • Publication number: 20200306904
    Abstract: A dust collecting system includes a power tool and a dust collector. The power tool is configured to perform processing operation on a workpiece by driving a tool accessory. The dust collector is configured to collect dust generated by the processing operation. The power tool includes a first motor and a driving mechanism configured to drive the tool accessory by power of the first motor. The dust collector includes a second motor and a fan configured to be rotationally driven by the second motor to generate air flow for collecting dust. The dust collecting system includes a first control device configured to control a rotation speed of the second motor according to a driving state of the power tool.
    Type: Application
    Filed: March 26, 2020
    Publication date: October 1, 2020
    Applicant: MAKITA CORPORATION
    Inventors: Hitoshi IIDA, Yoshiro TADA, Hideki TSUJI, Taro HISANO