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).

  • 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: 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
  • 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
  • Patent number: 10751868
    Abstract: It is an object of the invention to provide rational structure for vibration proofing in hammering operation. A driving motor 110 and a striking mechanism 140 are provided in a first body element 101a, and a handle 109 and a battery mounting part 160 are provided in a second body element 101b. The first and second body elements 101a, 101b are moved with respect to each other via a biasing member 181 when vibration is caused by driving of the striking mechanism 140. Further, a first region 100a close to the striking mechanism 140 forms a long-distance moving region 200 in which the first and second body elements 101a, 101b move a longer distance in a longitudinal direction than in the second region 100b less close to the striking mechanism 140.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: August 25, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Yoshiro Tada, Masanori Furusawa, Kei Watanabe
  • Patent number: 10744609
    Abstract: A dust collector for electric power tool includes a casing, a ring-shaped suction opening, a dust collecting route, and a filter. The suction opening protrudes forward from the casing. The tool bit of the electric power tool is insertable into the suction opening in a state where the suction opening is brought into contact with a surface to be processed. The dust collecting route is formed within the casing and guides an air suctioned from the suction opening to a dust collection portion in the casing. The filter is disposed in the dust collection portion to capture dust suctioned with the air. On the dust collecting route in the dust collection portion, a first filter and a second filter are disposed. The first filter includes a dust collecting chamber partitioned inside the dust collection portion. The second filter is arranged outside the first filter independently from the first filter.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: August 18, 2020
    Assignee: MAKITA CORPORATION
    Inventor: Yoshiro Tada
  • Patent number: 10744634
    Abstract: An impact tool is provided which has a driving mechanism, that drives a tool bit, a motor that drives the driving mechanism, an inner housing that houses the driving mechanism, an outer housing that has an internal space for housing the inner housing and the motor, an opening that leads from the outside to the internal space of the outer housing, and a covering member that covers the opening.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: August 18, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Yasuhiro Kakiuchi, Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
  • Publication number: 20200078918
    Abstract: An impact tool includes a motor, a driving mechanism, a body housing, a battery-mounting part, a first detection part and a control part. The driving mechanism is configured to linearly drive a tool accessory along a driving axis by power of the motor, the driving axis extending in a front-rear direction of the impact tool. The body housing houses the motor and the driving mechanism. The battery-mounting part is configured to removably receive a battery. The first detection part is configured to detect a rearward push of the tool accessory relative to the body housing. The control part is configured to start driving of the motor in response to detection of the rearward push of the tool accessory by the first detection part.
    Type: Application
    Filed: September 9, 2019
    Publication date: March 12, 2020
    Applicant: MAKITA CORPORATION
    Inventors: Kiyonobu YOSHIKANE, Yoshiro TADA, Yoshitaka MACHIDA
  • Publication number: 20190381646
    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: Application
    Filed: September 3, 2019
    Publication date: December 19, 2019
    Inventors: Kiyonobu YOSHIKANE, Hajime TAKEUCHI, Yoshiro TADA, Masanori FURUSAWA, Masao MIWA, Shinji ONODA, Yoshitaka MACHIDA
  • Publication number: 20190344416
    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: Application
    Filed: April 23, 2019
    Publication date: November 14, 2019
    Applicant: MAKITA CORPORATION
    Inventors: Yoshiro TADA, Kei WATANABE, Tetsuhisa KANEKO
  • Publication number: 20190314971
    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: Application
    Filed: February 28, 2019
    Publication date: October 17, 2019
    Applicant: MAKITA CORPORATION
    Inventors: Kiyonobu YOSHIKANE, Yoshiro TADA, Mizuki YAMAMOTO
  • Publication number: 20190291226
    Abstract: A dust collector for electric power tool includes a casing, a ring-shaped suction opening, a dust collecting route, and a filter. The suction opening protrudes forward from the casing. The tool bit of the electric power tool is insertable into the suction opening in a state where the suction opening is brought into contact with a surface to be processed. The dust collecting route is formed within the casing and guides an air suctioned from the suction opening to a dust collection portion in the casing. The filter is disposed in the dust collection portion to capture dust suctioned with the air. On the dust collecting route in the dust collection portion, a first filter and a second filter are disposed. The first filter includes a dust collecting chamber partitioned inside the dust collection portion. The second filter is arranged outside the first filter independently from the first filter.
    Type: Application
    Filed: January 31, 2019
    Publication date: September 26, 2019
    Applicant: MAKITA CORPORATION
    Inventor: Yoshiro TADA
  • Patent number: 10076833
    Abstract: An electric tool may include a battery mount portion having a guide groove structure that can be slidably fitted with a guide projection structure of a rechargeable battery. A reinforcing member may be attached to the guide groove structure of the battery mount portion and may include a connecting structure for detachably connecting the reinforcing member to the guide groove structure.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: September 18, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Yoshiro Tada, Masanori Furusawa
  • Patent number: 9956659
    Abstract: A dust collecting device 140 is provided which is attached to an electric hammer 101 having a side handle 110 which is removably attached to a body 103. The dust collecting device 140 has a dust collecting hood 141 and a hose holder 145. The side handle 110 has a mounting ring 111 which is mounted on the body 103, a grip 121 and a grip securing part 131. The grip 121 is secured by moving relative to the grip securing part 131 in a direction crossing an axial direction of the hammer bit 200. By this relative movement for securing the grip 121, the hose holder 145 is held between the grip 121 and the grip securing part 131.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: May 1, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
  • Patent number: 9950418
    Abstract: An impact tool is provided which has a driving mechanism 120, 140 that drives a tool bit 119, a motor 110 that drives the driving mechanism 120, 140, an inner housing 103 that houses the driving mechanism 120, 140, an outer housing 101 that has an internal space for housing the inner housing 103 and the motor 110, an opening 193 that leads from the outside to the internal space of the outer housing 101, and a covering member 195 that covers the opening 193.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: April 24, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Yasuhiro Kakiuchi, Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
  • Publication number: 20180065240
    Abstract: An impact tool is provided which has a driving mechanism, that drives a tool bit, a motor that drives the driving mechanism, an inner housing that houses the driving mechanism, an outer housing that has an internal space for housing the inner housing and the motor, an opening that leads from the outside to the internal space of the outer housing, and a covering member that covers the opening.
    Type: Application
    Filed: November 9, 2017
    Publication date: March 8, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Yasuhiro KAKIUCHI, Hajime TAKEUCHI, Masanori FURUSAWA, Yoshiro TADA