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).
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Patent number: 10315300Abstract: 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: GrantFiled: May 6, 2016Date of Patent: June 11, 2019Assignee: MAKITA CORPORATIONInventors: Hiroki Ikuta, Ken Yamauchi, Takamasa Hanai, Masao Miwa, Tomohiro Ukai, Shusaku Wakatsuki, Akihiro Ito
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Patent number: 10286464Abstract: 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: GrantFiled: September 11, 2017Date of Patent: May 14, 2019Assignee: MAKITA CORPORATIONInventors: Tomohiro Ukai, Takayuki Tahara, Taisuke Ukai, Yudai Sugino
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Patent number: 10259060Abstract: 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: GrantFiled: February 17, 2016Date of Patent: April 16, 2019Assignee: MAKITA CORPORATIONInventors: Yudai Sugino, Tomohiro Ukai
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Publication number: 20180301957Abstract: 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: ApplicationFiled: June 18, 2018Publication date: October 18, 2018Applicant: MAKITA CORPORATIONInventors: Ryosuke HARA, Tomohiro UKAI
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Publication number: 20180236572Abstract: 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: ApplicationFiled: February 15, 2018Publication date: August 23, 2018Inventor: Tomohiro UKAI
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Patent number: 10027201Abstract: 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: GrantFiled: February 17, 2016Date of Patent: July 17, 2018Assignee: MAKITA CORPORATIONInventors: Ryosuke Hara, Tomohiro Ukai
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Publication number: 20180021866Abstract: 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: ApplicationFiled: September 11, 2017Publication date: January 25, 2018Applicant: MAKITA CORPORATIONInventors: Tomohiro UKAI, Takayuki TAHARA, Taisuke UKAI, Yudai SUGINO
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Patent number: 9764399Abstract: 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: GrantFiled: December 26, 2013Date of Patent: September 19, 2017Assignee: MAKITA CORPORATIONInventors: Tomohiro Ukai, Takayuki Tahara, Taisuke Ukai, Yudai Sugino
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Publication number: 20160303668Abstract: 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: ApplicationFiled: February 17, 2016Publication date: October 20, 2016Applicant: MAKITA CORPORATIONInventors: Yudai SUGINO, Tomohiro UKAI
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Publication number: 20160294254Abstract: 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: ApplicationFiled: February 17, 2016Publication date: October 6, 2016Applicant: MAKITA CORPORATIONInventors: Ryosuke HARA, Tomohiro UKAI
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Patent number: 9440344Abstract: 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: GrantFiled: July 4, 2011Date of Patent: September 13, 2016Assignee: MAKITA CORPORATIONInventors: Hiroki Ikuta, Ken Yamauchi, Takamasa Hanai, Masao Miwa, Tomohiro Ukai, Shusaku Wakatsuki, Akihiro Ito
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Publication number: 20160250740Abstract: 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: ApplicationFiled: May 6, 2016Publication date: September 1, 2016Applicant: MAKITA CORPORATIONInventors: Hiroki IKUTA, Ken YAMAUCHI, Takamasa HANAI, Masao MIWA, Tomohiro UKAI, Shusaku WAKATSUKI, Akihiro ITO
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Publication number: 20160165328Abstract: 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: ApplicationFiled: March 26, 2014Publication date: June 9, 2016Applicant: MAKITA CORPORATIONInventors: Tomoyuki OTA, Kazunori TSUGE, Kentaro KOURA, Tomohiro UKAI, Yasushi OGURA, Taosuke UKAI
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Patent number: 9302363Abstract: 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: GrantFiled: July 4, 2011Date of Patent: April 5, 2016Assignee: MAKITA CORPORATIONInventors: Hiroki Ikuta, Ken Yamauchi, Takamasa Hanai, Masao Miwa, Tomohiro Ukai, Shusaku Wakatsuki, Akihiro Ito
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Patent number: 9259832Abstract: 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: GrantFiled: August 10, 2011Date of Patent: February 16, 2016Assignee: MAKITA CORPORATIONInventors: Masamichi Miyazawa, Tomohiro Ukai
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Publication number: 20150375315Abstract: 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: ApplicationFiled: December 26, 2013Publication date: December 31, 2015Applicant: MAKITA CORPORATIONInventors: Tomohiro UKAI, Takayuki TAHARA, Taisuke UKAI, Yudai SUGINO
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Patent number: 8944180Abstract: 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: GrantFiled: December 21, 2011Date of Patent: February 3, 2015Assignee: Makita CorporationInventors: Hiroki Ikuta, Tomohiro Ukai, Yuta Matsuura, Yosuke Nishio
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Patent number: 8944179Abstract: 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: GrantFiled: December 21, 2011Date of Patent: February 3, 2015Assignee: Makita CorporationInventors: Tomohiro Ukai, Yuta Matsuura, Takamasa Hanai, Junpei Kamimoto, Akihiro Ito
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Publication number: 20150014007Abstract: 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: ApplicationFiled: December 26, 2012Publication date: January 15, 2015Inventors: Tomohiro Ukai, Tooru Itakura, Akinori Ito
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Patent number: D845730Type: GrantFiled: November 10, 2017Date of Patent: April 16, 2019Assignee: MAKITA CORPORATIONInventors: Koji Takahashi, Tomohiro Ukai