Patents by Inventor Tatsuya Kamada
Tatsuya Kamada 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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Publication number: 20240364175Abstract: [Problem] To provide a motor capable of restricting relative rotation of a stator without reducing a magnetic field of the stator or increasing the number of components. [Solution] The motor 1 includes a rotor 2 rotatable about a rotary shaft 10, a stator 3 disposed radially outward of the rotor 2, and a housing 4 that houses the rotor 2 and the stator 3. The stator 3 is press-fitted to an inner peripheral surface of the housing 4. The motor has a stator core 20 provided to surround the rotor 2 and a coil 21 wound around the stator core 20. The stator core 20 has an engaging portion 23 protruding radially outward from an outer peripheral surface. The housing 4 has an engaged portion 32 that is recessed radially outward from the inner peripheral surface and with which the engaging portion 23 engages.Type: ApplicationFiled: April 23, 2024Publication date: October 31, 2024Inventor: Tatsuya KAMADA
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Patent number: 12062971Abstract: A moving body driving unit includes: a casing; an electric motor placed in a motor storage portion formed in an inner side of the casing on one side in a first direction which is predetermined and that has a motor shaft which extends in the first direction; a gear device placed in a gear storage portion formed in the inner side of the casing on the other side in the first direction and which also functions as an oil reservoir; a motive power transmitting mechanism placed at the inner side of the casing and that transmits motive power between the motor shaft and the gear device; an oil passage that interconnects the motor storage portion and the gear storage portion at the inner side of the casing; an oil introduction port; an oil discharge port; and an external oil path.Type: GrantFiled: January 21, 2020Date of Patent: August 13, 2024Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.Inventors: Koji Kiyooka, Takashi Nishizawa, Kousaku Kita, Tasuku Inoue, Tatsuya Kamada
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Publication number: 20240079918Abstract: [Problem] To provide a rotor unit that may effectively prevent detachment of a magnet with a holder while absorbing dimensional errors of a rotor main body and the magnet. [Solution] In the rotor unit according to the present invention, the holder mountable on the rotor main body prevents the magnet from being detached from the rotor main body. The holder includes an elastically deformable insertion arm extending from a flat-plate like holder main body, a hook portion provided on a free end side of the insertion arm, an elastically deformable magnet pressing arm extending from the holder main body, and a magnet pressing portion provided on a free end side of the magnet pressing arm. The rotor main body includes a hook hole into which the insertion arm is inserted, and the hook hole is provided with a locking portion in which the hook portion is lockable.Type: ApplicationFiled: August 31, 2023Publication date: March 7, 2024Inventors: Takahiro MORIMOTO, Yuto KIMURA, Toshinobu SHINOHARA, Hitoshi ADACHI, Kohei OKURA, Tatsuya KAMADA
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Patent number: 11614165Abstract: A fork guide groove of a drum member guides a shift fork so that a shifter member is in a reference position not engaged with first and second speed change members when the drum member is placed in a neutral position, is movable between a first speed-change position engaged with the first speed-change member and the reference position when the drum member is placed in a first operational position, and is movable between a second speed-change position engaged with the second speed-change member and the reference position when the drum member is placed in a second operational position. A slider guide groove of the drum member guides a slider member supported by a fork shaft in an axially movable manner so as not to obstruct movement of the shifter member between the reference position and the first speed-change position when the drum member is placed in the first operational position.Type: GrantFiled: December 22, 2021Date of Patent: March 28, 2023Inventors: Shuji Nishimoto, Yasuhito Nakai, Tatsuya Kamada
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Patent number: 11427088Abstract: A movable structure driving unit is a movable structure driving unit used for a movable structure, including: an electric motor that is electrically connected to a power supply and that drives a front wheel; a rear-side motive power source that drives a rear wheel; a jump detector that detects a jump of the front wheel from ground; and a motor controller that controls driving of the electric motor. The motor controller stops supply of a driving current from the power supply to the electric motor when the jump of the front wheel from the ground is detected in a state in which driving of the front wheel and the rear wheel is instructed.Type: GrantFiled: June 27, 2019Date of Patent: August 30, 2022Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.Inventors: Tatsuya Kamada, Michio Tsukamoto, Masaru Iida
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Publication number: 20220163111Abstract: A fork guide groove of a drum member guides a shift fork so that a shifter member is in a reference position not engaged with first and second speed change members when the drum member is placed in a neutral position, is movable between a first speed-change position engaged with the first speed-change member and the reference position when the drum member is placed in a first operational position, and is movable between a second speed-change position engaged with the second speed-change member and the reference position when the drum member is placed in a second operational position. A slider guide groove of the drum member guides a slider member supported by a fork shaft in an axially movable manner so as not to obstruct movement of the shifter member between the reference position and the first speed-change position when the drum member is placed in the first operational position.Type: ApplicationFiled: December 22, 2021Publication date: May 26, 2022Inventors: Shuji NISHIMOTO, Yasuhito NAKAI, Tatsuya KAMADA
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Publication number: 20220131445Abstract: In a driving device according to the present invention, an internal space of a fixed housing provided with an electric motor and an electric circuit board configured to control drive of the electric motor is partitioned into a first chamber arranged therein with the electric motor and a second chamber arranged therein with the electric circuit board. The driving device includes a heat dissipation part configured to efficiently dissipate heat generated from the electric circuit board, from the second chamber to the outside of the fixed housing, and thus, heat generated from the electric motor is not easily transmitted to the second chamber via the fixed housing, and moisture is prevented from entering the fixed housing when outside air flows into the fixed housing.Type: ApplicationFiled: September 30, 2021Publication date: April 28, 2022Inventors: Yusuke NAKAMURA, Shigeaki NAKAGAWA, Tatsuya KAMADA, Masato ARATA, Yoshitaka KOCHIDOMARI, Kousaku KITA, Yujiro TANAKA
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Publication number: 20200244143Abstract: A moving body driving unit includes: a casing; an electric motor placed in a motor storage portion formed in an inner side of the casing on one side in a first direction which is predetermined and that has a motor shaft which extends in the first direction; a gear device placed in a gear storage portion formed in the inner side of the casing on the other side in the first direction and which also functions as an oil reservoir; a motive power transmitting mechanism placed at the inner side of the casing and that transmits motive power between the motor shaft and the gear device; an oil passage that interconnects the motor storage portion and the gear storage portion at the inner side of the casing; an oil introduction port; an oil discharge port; and an external oil path.Type: ApplicationFiled: January 21, 2020Publication date: July 30, 2020Inventors: Koji KIYOOKA, Takashi NISHIZAWA, Kousaku KITA, Tasuku INOUE, Tatsuya KAMADA
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Publication number: 20200009969Abstract: A movable structure driving unit is a movable structure driving unit used for a movable structure, including: an electric motor that is electrically connected to a power supply and that drives a front wheel; a rear-side motive power source that drives a rear wheel; a jump detector that detects a jump of the front wheel from ground; and a motor controller that controls driving of the electric motor. The motor controller stops supply of a driving current from the power supply to the electric motor when the jump of the front wheel from the ground is detected in a state in which driving of the front wheel and the rear wheel is instructed.Type: ApplicationFiled: June 27, 2019Publication date: January 9, 2020Inventors: Tatsuya KAMADA, Michio TSUKAMOTO, Masaru IIDA
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Patent number: 10326174Abstract: A battery pack (1) includes: a battery stack (20) in which a plurality of laminar battery cells (10) are connected in series; a voltage monitoring unit (3) that monitors the voltage of each battery cell; a power unit (4) that has power lines (41p, 41n) for connecting the battery stack (20) and external connection terminals (42p, 42n), a current monitoring unit (44) for monitoring the current of the power lines, and a switch (43) for disconnecting the power lines; and a control unit (5) that receives signals from the voltage monitoring unit and the current monitoring unit, and outputs to the switch a signal for shutting off the power line. The power unit (4) is provided on a power board (74) separately from boards (73, 75) on which the voltage monitoring unit (3) and the control unit (5) are provided. Wiring formed on the power board (74) is thicker than that formed on the boards (73, 75) on which the voltage monitoring unit and the control unit are provided.Type: GrantFiled: July 30, 2014Date of Patent: June 18, 2019Assignee: MAXELL HOLDINGS, LTD.Inventors: Tatsuya Kamada, Naoaki Ogino
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Publication number: 20180328487Abstract: In a shift-drum speed change operation mechanism, a fork guide groove of a drum member guides a shift fork such that the shift fork is secured in a reference position where it is not depression/projection-engaged with any of first and second speed change members. The shift fork is capable of moving between the reference position and a first speed change position or a second speed change position, where it is depression/projection-engaged with the first or second speed change member respectively, when the drum member is placed in neutral, first and second speed change positions. A slider guide groove of the drum member guides a slider member, which is supported on a boss part of the shift fork in an axially movable manner, so that the slider member does not obstruct movement of the shifter member between the reference and first speed change positions when the drum member is placed in the first speed change position.Type: ApplicationFiled: November 20, 2017Publication date: November 15, 2018Inventors: Shuji NISHIMOTO, Yasuhito NAKAI, Tatsuya KAMADA
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Patent number: 9797485Abstract: A belt type continuously variable transmission device includes an actuator that moves a moveable sheave member of a drive pulley which is a one-side pulley in an axial direction. The actuator includes a moveable feed member, a gear case, and an electric motor. The moveable feed member includes an inner tube section in which a moveable-side feed screw is provided, an outer tube section in which an outer gear is provided, and a lid section. The gear case has a fixed tube section in which a fixed-side feed screw is provided, and an outer cover. The electric motor drives a motor-side gear that intermeshes with the outer gear. The outer cover has an opening into which the outer tube section is inserted and that proximately opposes an outer circumferential surface of the outer tube section.Type: GrantFiled: February 4, 2016Date of Patent: October 24, 2017Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.Inventors: Tomoyuki Ebihara, Tatsuya Kamada, Michio Tsukamoto, Koji Iwaki
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Publication number: 20170284510Abstract: A dual clutch transmission comprises a housing formed therein with a gear chamber incorporating an odd-numbered speed gear train group and an even-numbered speed gear train group. An end of the input shaft is connected to an engine, and a cover is detachably attached to the housing opposite the end of the input shaft so as to define a clutch chamber divided from the gear chamber. A first clutch for the odd-numbered speed gear train group and a second clutch for the even-numbered speed gear train group are disposed in the clutch chamber. Fluid passages for supplying hydraulic fluid to the first and second clutches are formed in the cover.Type: ApplicationFiled: March 29, 2017Publication date: October 5, 2017Inventors: Koji IWAKI, Jun MATSUURA, Nobuhiro SHIMOBAYASHI, Daisuke MURASHIMA, Tetsuya KAWATANI, Shuji NISHIMOTO, Tatsuya KAMADA, Takehiro OTA
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Publication number: 20160197381Abstract: A battery pack (1) includes: a battery stack (20) in which a plurality of laminar battery cells (10) are connected in series; a voltage monitoring unit (3) that monitors the voltage of each battery cell; a power unit (4) that has power lines (41p, 41n) for connecting the battery stack (20) and external connection terminals (42p, 42n), a current monitoring unit (44) for monitoring the current of the power lines, and a switch (43) for disconnecting the power lines; and a control unit (5) that receives signals from the voltage monitoring unit and the current monitoring unit, and outputs to the switch a signal for shutting off the power line. The power unit (4) is provided on a power board (74) separately from boards (73, 75) on which the voltage monitoring unit (3) and the control unit (5) are provided. Wiring formed on the power board (74) is thicker than that formed on the boards (73, 75) on which the voltage monitoring unit and the control unit are provided.Type: ApplicationFiled: July 30, 2014Publication date: July 7, 2016Applicant: HITACHI MAXELL, LTD.Inventors: Tatsuya KAMADA, Naoaki OGINO
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Publication number: 20160186841Abstract: A belt type continuously variable transmission device includes an actuator that moves a moveable sheave member of a drive pulley which is a one-side pulley in an axial direction. The actuator includes a moveable feed member, a gear case, and an electric motor. The moveable feed member includes an inner tube section in which a moveable-side feed screw is provided, an outer tube section in which an outer gear is provided, and a lid section. The gear case has a fixed tube section in which a fixed-side feed screw is provided, and an outer cover. The electric motor drives a motor-side gear that intermeshes with the outer gear. The outer cover has an opening into which the outer tube section is inserted and that proximately opposes an outer circumferential surface of the outer tube section.Type: ApplicationFiled: February 4, 2016Publication date: June 30, 2016Applicant: Kanzaki Kokyukoki Mfg. Co., Ltd.Inventors: Tomoyuki Ebihara, Tatsuya Kamada, Michio Tsukamoto, Koji Iwaki
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Publication number: 20150011344Abstract: A belt type continuously variable transmission device includes an actuator that moves a moveable sheave member of a drive pulley which is a one-side pulley in an axial direction. The actuator includes a moveable feed member, a gear case, and an electric motor. The moveable feed member includes an inner tube section in which a moveable-side feed screw is provided, an outer tube section in which an outer gear is provided, and a lid section. The gear case has a fixed tube section in which a fixed-side feed screw is provided, and an outer cover. The electric motor drives a motor-side gear that intermeshes with the outer gear. The outer cover has an opening into which the outer tube section is inserted and that proximately opposes an outer circumferential surface of the outer tube section.Type: ApplicationFiled: July 3, 2014Publication date: January 8, 2015Inventors: TOMOYUKI EBIHARA, Tatsuya Kamada, Michio Tsukamoto, Koji Iwaki
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Publication number: 20100266877Abstract: In a battery pack in which a protective circuit is fitted to a unit cell and accommodated in an exterior cover, a frame is provided in the exterior cover, the frame being fixed to the unit cell and supporting the protective circuit, where a protruding portion protruded from the frame and an engaging hole provided in the unit cell are engaged with each other. As a result of this, when external force acts on the exterior cover, movement of the frame integrated with the exterior cover can be inhibited.Type: ApplicationFiled: April 20, 2010Publication date: October 21, 2010Inventors: Hideaki EBIHARA, Tatsuya KAMADA
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Publication number: 20100216015Abstract: In a battery pack in which accessory parts are fitted to a unit cell, the unit cell has a terminal portion, accessory parts include an electrical-connection use lead and a frame having an engagement portion to be engaged with the lead, and the lead and the terminal portion are bonded together by welding while the lead is engaged with the engagement portion. As a result of this, movement of the frame can be inhibited under action of external force. Moreover, in a structure in which an exterior cover is fitted to the frame or in which resin mold is integrally molded with the frame, movement of these members can be inhibited when external force acts on the exterior cover or the resin mold.Type: ApplicationFiled: February 19, 2010Publication date: August 26, 2010Inventors: Tatsuya Kamada, Takashi Sumida, Hideaki Ebihara
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Publication number: 20070194753Abstract: A battery pack whose resin mold is hard to peel off from the outer peripheral surface of its unit cell and which can be manufactured at low cost is obtained. The battery pack includes a flat prismatic box-shaped unit cell and a resin mold formed on the outer peripheral side surface of the unit cell. In order to prevent the resin mold from easily peeling off, a rough surface portion 25 is formed on the outer peripheral side surface of the unit cell 1 by forming numbers of minute dots by laser beam machining on the outer peripheral side surface put in contact with the resin mold.Type: ApplicationFiled: February 20, 2007Publication date: August 23, 2007Inventors: Takashi Sumida, Masanori Yamakata, Tatsuya Kamada