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).

  • Publication number: 20240076005
    Abstract: A vehicle, including: a body frame; a saddle-style seat provided on the body frame; a pair of front wheels provided at a front portion of the body frame; a pair of rear wheels provided at a rear portion of the body frame; an engine provided in the body frame and including a crank shaft extending in a width direction of the vehicle; and a footrest provided at the body frame and including a first step and a second step provided behind the first step and extending diagonally rearward. The crank shaft is located between an upper end and a lower end of the second step in a height direction of the vehicle, and further rearward than the second step in a fore-aft direction of the vehicle.
    Type: Application
    Filed: August 30, 2023
    Publication date: March 7, 2024
    Inventors: Masahiro YOSHIDA, Kensuke KAMADA, Tatsuya TANAKA
  • Publication number: 20240079918
    Abstract: [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: Application
    Filed: August 31, 2023
    Publication date: March 7, 2024
    Inventors: Takahiro MORIMOTO, Yuto KIMURA, Toshinobu SHINOHARA, Hitoshi ADACHI, Kohei OKURA, Tatsuya KAMADA
  • Patent number: 11614165
    Abstract: 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: Grant
    Filed: December 22, 2021
    Date of Patent: March 28, 2023
    Inventors: Shuji Nishimoto, Yasuhito Nakai, Tatsuya Kamada
  • Patent number: 11427088
    Abstract: 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: Grant
    Filed: June 27, 2019
    Date of Patent: August 30, 2022
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Tatsuya Kamada, Michio Tsukamoto, Masaru Iida
  • Publication number: 20220163111
    Abstract: 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: Application
    Filed: December 22, 2021
    Publication date: May 26, 2022
    Inventors: Shuji NISHIMOTO, Yasuhito NAKAI, Tatsuya KAMADA
  • Publication number: 20220131445
    Abstract: 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: Application
    Filed: September 30, 2021
    Publication date: April 28, 2022
    Inventors: Yusuke NAKAMURA, Shigeaki NAKAGAWA, Tatsuya KAMADA, Masato ARATA, Yoshitaka KOCHIDOMARI, Kousaku KITA, Yujiro TANAKA
  • Publication number: 20200244143
    Abstract: 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: Application
    Filed: January 21, 2020
    Publication date: July 30, 2020
    Inventors: Koji KIYOOKA, Takashi NISHIZAWA, Kousaku KITA, Tasuku INOUE, Tatsuya KAMADA
  • Publication number: 20200009969
    Abstract: 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: Application
    Filed: June 27, 2019
    Publication date: January 9, 2020
    Inventors: Tatsuya KAMADA, Michio TSUKAMOTO, Masaru IIDA
  • Patent number: 10326174
    Abstract: 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: Grant
    Filed: July 30, 2014
    Date of Patent: June 18, 2019
    Assignee: MAXELL HOLDINGS, LTD.
    Inventors: Tatsuya Kamada, Naoaki Ogino
  • Publication number: 20180328487
    Abstract: 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: Application
    Filed: November 20, 2017
    Publication date: November 15, 2018
    Inventors: Shuji NISHIMOTO, Yasuhito NAKAI, Tatsuya KAMADA
  • Patent number: 9797485
    Abstract: 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: Grant
    Filed: February 4, 2016
    Date of Patent: October 24, 2017
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Tomoyuki Ebihara, Tatsuya Kamada, Michio Tsukamoto, Koji Iwaki
  • Publication number: 20170284510
    Abstract: 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: Application
    Filed: March 29, 2017
    Publication date: October 5, 2017
    Inventors: Koji IWAKI, Jun MATSUURA, Nobuhiro SHIMOBAYASHI, Daisuke MURASHIMA, Tetsuya KAWATANI, Shuji NISHIMOTO, Tatsuya KAMADA, Takehiro OTA
  • Publication number: 20160197381
    Abstract: 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: Application
    Filed: July 30, 2014
    Publication date: July 7, 2016
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Tatsuya KAMADA, Naoaki OGINO
  • Publication number: 20160186841
    Abstract: 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: Application
    Filed: February 4, 2016
    Publication date: June 30, 2016
    Applicant: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Tomoyuki Ebihara, Tatsuya Kamada, Michio Tsukamoto, Koji Iwaki
  • Publication number: 20150011344
    Abstract: 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: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: TOMOYUKI EBIHARA, Tatsuya Kamada, Michio Tsukamoto, Koji Iwaki
  • Publication number: 20100266877
    Abstract: 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: Application
    Filed: April 20, 2010
    Publication date: October 21, 2010
    Inventors: Hideaki EBIHARA, Tatsuya KAMADA
  • Publication number: 20100216015
    Abstract: 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: Application
    Filed: February 19, 2010
    Publication date: August 26, 2010
    Inventors: Tatsuya Kamada, Takashi Sumida, Hideaki Ebihara
  • Publication number: 20070194753
    Abstract: 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: Application
    Filed: February 20, 2007
    Publication date: August 23, 2007
    Inventors: Takashi Sumida, Masanori Yamakata, Tatsuya Kamada