Patents by Inventor Tomohiro Ukai

Tomohiro Ukai 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: 10315300
    Abstract: A dust collection device, that collects dust particles generated by an impact tool, has a feature that enables the attachment of the device to the impact tool, which is not provided with an attachment section for the device. The dust collection device has a tool body and an auxiliary handle, attached removably to the tool body, and is attached to an electric hammer that, in the lengthwise direction, linearly operates a tool bit mounted to the tip region of the tool body, and collects dust generated by the electric hammer. The dust collection device has: a dust collection unit that has a dust intake port at the tip; a dust collection hose, connected to the dust collection unit, for transferring dust to the downstream side; and a hose-holding unit that holds the dust collection hose. The hose-holding unit can be attached to and removed from the auxiliary handle.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: June 11, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Hiroki Ikuta, Ken Yamauchi, Takamasa Hanai, Masao Miwa, Tomohiro Ukai, Shusaku Wakatsuki, Akihiro Ito
  • Patent number: 10286464
    Abstract: A motor housing of housings forming an outer casing of a tool main body is provided with two battery attachment portions allowing attachment of rechargeable batteries. The two battery attachment portions are configured as slide attachment type battery attachment portions. The two battery attachment portions are suited to slide attachment type rechargeable batteries that are attached through sliding. The two rechargeable batteries are attached in the right-left direction of the tool main body so that the two rechargeable batteries can be arranged side by side in the direction in which the tool main body extends.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: May 14, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Tomohiro Ukai, Takayuki Tahara, Taisuke Ukai, Yudai Sugino
  • Patent number: 10259060
    Abstract: A reciprocating tool includes a motor, a crank, a connecting rod, a rod, a tool bit, and a counter weight. The tool bit is mounted such that the action portion is positioned on a side opposite to a side with the rod central axis or the extended line of the rod central axis viewing from the rotational center of the crank. The first eccentric shaft and the second eccentric shaft are disposed such that at a position where the first eccentric shaft causes the rod to reach top dead center (TDC), the second eccentric shaft causes the counter weight to reach bottom dead center (BDC) or a point before the BDC, and at a position where the first eccentric shaft causes the rod to reach the BDC, the second eccentric shaft causes the counter weight to reach a point before the TDC.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: April 16, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Yudai Sugino, Tomohiro Ukai
  • Publication number: 20180301957
    Abstract: A reciprocating tool includes a motor, a reciprocating member, and a crank mechanism. The motor is disposed in a housing. The reciprocating member projects from the housing. The crank mechanism converts rotation of a rotation shaft of the motor into reciprocation of the reciprocating member. The crank mechanism rotates around an axis in a lateral direction by rotation transmission from the rotation shaft, and the crank mechanism includes a crank member having an eccentric pin, a connecting rod coupling the eccentric pin to the reciprocating member, and a balancer coupled to the eccentric pin, and the balancer is supported by the eccentric pin alone in the housing.
    Type: Application
    Filed: June 18, 2018
    Publication date: October 18, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Ryosuke HARA, Tomohiro UKAI
  • Publication number: 20180236572
    Abstract: A reciprocating saw includes a motor having a rotor that is rotatable relative to a stator. A rotary shaft is fixedly connected to, and rotatably driven by the rotor. The rotary shaft has a rotational axis. A reciprocating-motion converting mechanism is driven by rotation of the rotary shaft, and a slider is reciprocally moved in a first direction by the reciprocating-motion converting mechanism. The rotational axis of the motor and the first direction form an angle of 45-135°.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 23, 2018
    Inventor: Tomohiro UKAI
  • Patent number: 10027201
    Abstract: A reciprocating tool includes a motor, a reciprocating member, and a crank mechanism. The motor is disposed in a housing. The reciprocating member projects from the housing. The crank mechanism converts rotation of a rotation shaft of the motor into reciprocation of the reciprocating member. The crank mechanism rotates around an axis ma lateral direction by rotation transmission from the rotation, shaft, and the crank, mechanism includes a crank member having an eccentric pin, a connecting rod coupling the eccentric pin to the reciprocating member, and a balancer coupled to the eccentric pin, and the balancer is supported by the eccentric pin alone in the housing.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: July 17, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Ryosuke Hara, Tomohiro Ukai
  • Publication number: 20180021866
    Abstract: A motor housing of housings forming an outer casing of a tool main body is provided with two battery attachment portions allowing attachment of rechargeable batteries. The two battery attachment portions are configured as slide attachment type battery attachment portions. The two battery attachment portions are suited to slide attachment type rechargeable batteries that are attached through sliding. The two rechargeable batteries are attached in the right-left direction of the tool main body so that the two rechargeable batteries can be arranged side by side in the direction in which the tool main body extends.
    Type: Application
    Filed: September 11, 2017
    Publication date: January 25, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Tomohiro UKAI, Takayuki TAHARA, Taisuke UKAI, Yudai SUGINO
  • Patent number: 9764399
    Abstract: A motor housing of housings forming an outer casing of a tool main body is provided with two battery attachment portions allowing attachment of rechargeable batteries. The two battery attachment portions are configured as slide attachment type battery attachment portions. The two battery attachment portions are suited to slide attachment type rechargeable batteries that are attached through sliding. The two rechargeable batteries are attached in the right-left direction of the tool main body so that the two rechargeable batteries can be arranged side by side in the direction in which the tool main body extends.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: September 19, 2017
    Assignee: MAKITA CORPORATION
    Inventors: Tomohiro Ukai, Takayuki Tahara, Taisuke Ukai, Yudai Sugino
  • Publication number: 20160303668
    Abstract: A reciprocating tool includes a motor, a crank, a connecting rod, a rod, a tool bit, and a counter weight. The tool bit is mounted such that the action portion is positioned on a side opposite to a side with the rod central axis or the extended line of the rod central axis viewing from the rotational center of the crank. The first eccentric shaft and the second eccentric shaft are disposed such that at a position where the first eccentric shaft causes the rod to reach TDC, the second eccentric shaft causes the counter weight to reach BDC or a point before the BDC, and at a position where the first eccentric shaft causes the rod to reach the BDC, the second eccentric shaft causes the counter weight to reach a point before the TDC.
    Type: Application
    Filed: February 17, 2016
    Publication date: October 20, 2016
    Applicant: MAKITA CORPORATION
    Inventors: Yudai SUGINO, Tomohiro UKAI
  • Publication number: 20160294254
    Abstract: A reciprocating tool includes a motor, a reciprocating member, and a crank mechanism. The motor is disposed in a housing. The reciprocating member projects from the housing. The crank mechanism converts rotation of a rotation shaft of the motor into reciprocation of the reciprocating member. The crank mechanism rotates around an axis ma lateral direction by rotation transmission from the rotation, shaft, and the crank, mechanism includes a crank member having an eccentric pin, a connecting rod coupling the eccentric pin to the reciprocating member, and a balancer coupled to the eccentric pin, and the balancer is supported by the eccentric pin alone in the housing.
    Type: Application
    Filed: February 17, 2016
    Publication date: October 6, 2016
    Applicant: MAKITA CORPORATION
    Inventors: Ryosuke HARA, Tomohiro UKAI
  • Patent number: 9440344
    Abstract: A dust collection device, that collects dust particles generated by an impact tool, has a feature that enables the attachment of the device to the impact tool, which is not provided with an attachment section for the device. The dust collection device has a tool body and an auxiliary handle, attached removably to the tool body, and is attached to an electric hammer that, in the lengthwise direction, linearly operates a tool bit mounted to the tip region of the tool body, and collects dust generated by the electric hammer. The dust collection device has: a dust collection unit that has a dust intake port at the tip; a dust collection hose, connected to the dust collection unit, for transferring dust to the downstream side; and a hose-holding unit that holds the dust collection hose. The hose-holding unit can be attached to and removed from the auxiliary handle.
    Type: Grant
    Filed: July 4, 2011
    Date of Patent: September 13, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Hiroki Ikuta, Ken Yamauchi, Takamasa Hanai, Masao Miwa, Tomohiro Ukai, Shusaku Wakatsuki, Akihiro Ito
  • Publication number: 20160250740
    Abstract: A dust collection device, that collects dust particles generated by an impact tool, has a feature that enables the attachment of the device to the impact tool, which is not provided with an attachment section for the device. The dust collection device has a tool body and an auxiliary handle, attached removably to the tool body, and is attached to an electric hammer that, in the lengthwise direction, linearly operates a tool bit mounted to the tip region of the tool body, and collects dust generated by the electric hammer. The dust collection device has: a dust collection unit that has a dust intake port at the tip; a dust collection hose, connected to the dust collection unit, for transferring dust to the downstream side; and a hose-holding unit that holds the dust collection hose. The hose-holding unit can be attached to and removed from the auxiliary handle.
    Type: Application
    Filed: May 6, 2016
    Publication date: September 1, 2016
    Applicant: MAKITA CORPORATION
    Inventors: Hiroki IKUTA, Ken YAMAUCHI, Takamasa HANAI, Masao MIWA, Tomohiro UKAI, Shusaku WAKATSUKI, Akihiro ITO
  • Publication number: 20160165328
    Abstract: A rechargeable radio is provided with battery attachment portion for attaching electric power tool battery and radio communication section. An input section, of which an operation input is performed in rechargeable radio, is connected to control section. Input section includes an operation part and microphone part. Output section, of which a sound output and a display output are performed in rechargeable radio, is connected to control section. Audio output section outputs sound based on sound output signal transmitted from control section. Rechargeable radio is configured to access to radio communication function of smart phone via radio communication section, whereby it is possible to perform sound input and output relating to smart phone through rechargeable radio. As a result, added values of rechargeable radio are improved, thereby achieving improvement in terms of interests of rechargeable radio including convenience.
    Type: Application
    Filed: March 26, 2014
    Publication date: June 9, 2016
    Applicant: MAKITA CORPORATION
    Inventors: Tomoyuki OTA, Kazunori TSUGE, Kentaro KOURA, Tomohiro UKAI, Yasushi OGURA, Taosuke UKAI
  • Patent number: 9302363
    Abstract: Disclosed is a feature that collects dust particles that arise from a processing operation of an impact tool. The dust collection device collects dust that arises from of a processing operation and is attached to the impact tool that performs a pre-determined processing operation on a processed member by way of a tool bit mounted to the tip region of the tool body being linearly operated at least in the lengthwise direction. The dust collection device has a dust collection unit of which the tip opens as a dust intake port and the contour shape is formed unevenly around the long axis of the tool bit. The position of the dust collection unit is freely selected around the long axis of the tool bit, and it is possible to cause the position to change around the long axis of the bit.
    Type: Grant
    Filed: July 4, 2011
    Date of Patent: April 5, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Hiroki Ikuta, Ken Yamauchi, Takamasa Hanai, Masao Miwa, Tomohiro Ukai, Shusaku Wakatsuki, Akihiro Ito
  • Patent number: 9259832
    Abstract: A handheld electrical power tool may include a plurality of grasping portions, and at least one manipulating member to actuate and deactuate a drive source of the electrical power tool. The at least one manipulating member is positioned to correspond to all of the grasping portions.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: February 16, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Masamichi Miyazawa, Tomohiro Ukai
  • Publication number: 20150375315
    Abstract: A motor housing of housings forming an outer casing of a tool main body is provided with two battery attachment portions allowing attachment of rechargeable batteries. The two battery attachment portions are configured as slide attachment type battery attachment portions. The two battery attachment portions are suited to slide attachment type rechargeable batteries that are attached through sliding. The two rechargeable batteries are attached in the right-left direction of the tool main body so that the two rechargeable batteries can be arranged side by side in the direction in which the tool main body extends.
    Type: Application
    Filed: December 26, 2013
    Publication date: December 31, 2015
    Applicant: MAKITA CORPORATION
    Inventors: Tomohiro UKAI, Takayuki TAHARA, Taisuke UKAI, Yudai SUGINO
  • Patent number: 8944179
    Abstract: A power tool that includes a driving motor and a power transmitting mechanism. The power transmitting mechanism includes a first clutch cam part, a second clutch cam part, clutch teeth, a clutch detecting mechanism and a controller that can control the driving motor in a first control mode in which the driving motor is controlled to rotate at a first rotation speed until before the first and second clutch cam parts are engaged with each other at the clutch teeth and in a second control mode in which the driving motor is controlled to rotate at a second rotation speed higher than the first rotation speed after the first and second clutch cam parts are engaged with each other at the clutch teeth.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 3, 2015
    Assignee: Makita Corporation
    Inventors: Tomohiro Ukai, Yuta Matsuura, Takamasa Hanai, Junpei Kamimoto, Akihiro Ito
  • Patent number: 8944180
    Abstract: The power tool has a power transmitting mechanism. When a tool bit is not pressed against a workpiece, the power transmitting mechanism is held in a power transmission interrupted state, and when the tool bit is pressed against the workpiece, the power transmitting mechanism is held in a power transmission state in which the tool bit moves together with the driven-side member in an axial direction of the tool bit so that the driving-side member receives the torque from the driven-side member and the tool bit is driven. Tapered portions are provided between the driving-side member and the driven-side member and inclined with respect to the axial direction of the tool bit. When the driven-side member moves in the axial direction of the tool bit, frictional force is caused on the tapered portions and the torque of the driving-side member is transmitted to the driven-side member by the frictional force.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 3, 2015
    Assignee: Makita Corporation
    Inventors: Hiroki Ikuta, Tomohiro Ukai, Yuta Matsuura, Yosuke Nishio
  • Publication number: 20150014007
    Abstract: A power tool includes an outer rotor electric motor, a spindle and a gear train, and a tool accessory can be attached the spindle. The gear train transmits the rotational output of the electric motor to the spindle, and the speed reduction ratio of the gear train may be less than the speed reduction ratio of the gear train would need to be if the motor were instead an inner rotor electric motor.
    Type: Application
    Filed: December 26, 2012
    Publication date: January 15, 2015
    Inventors: Tomohiro Ukai, Tooru Itakura, Akinori Ito
  • Patent number: D845730
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: April 16, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Koji Takahashi, Tomohiro Ukai