Patents by Inventor Kazuo Koike

Kazuo Koike 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: 10562567
    Abstract: A work vehicle includes a battery that outputs a DC power, at least two electric motors, and at least two inverters, each inverter being configured to convert the DC power from the battery into an AC power and to supply the AC power to one of the electric motors. The work vehicle further includes an accommodation box attachable/detachable to/from the vehicle body, the accommodation box accommodating a plurality of electrical equipments including the inverters.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: February 18, 2020
    Assignee: Kubota Corporation
    Inventors: Kazuo Koike, Hirokazu Ito
  • Publication number: 20200031215
    Abstract: An electric work vehicle includes: a battery pack that is arranged between a left rear wheel arranged outside of a left frame and a right rear wheel arranged outside of a right frame, the front end of the battery pack being located forward of an axle center of a rear wheel unit; a left motor that is arranged above the battery pack, in the periphery of the left rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the left rear wheel; and a right motor that is arranged above the battery pack, in the periphery of the right rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the right rear wheel.
    Type: Application
    Filed: October 2, 2019
    Publication date: January 30, 2020
    Inventors: Hirokazu Ito, Kazuo Koike, Yasuhiro Manji
  • Patent number: 10499565
    Abstract: A grass mower machine includes a mower deck 30 that protrudes from a frame unit in a machine body transverse direction, cutter blades 20 attached respectively to a first rotation shaft 21, a second rotation shaft 22 and a third rotation shaft 23 that are disposed side by side and spaced apart from each other in the machine body transverse direction, a first power transmitting body 71 for transmitting power from an output shaft 41 of an electric motor 4 which is disposed on an outer side of rotation paths of the cutter blades 20 as seen in a plane view to the first rotation shaft 21, a second power transmitting body 72 for transmitting power from the first rotation shaft 21 to the second rotation shaft 22, and a third power transmitting body 73 for transmitting power from the second rotation shaft 22 to the third rotation shaft 23.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: December 10, 2019
    Assignee: Kubota Corporation
    Inventors: Hirokazu Ito, Kazuo Koike
  • Patent number: 10493835
    Abstract: An electric work vehicle includes: a battery pack that is arranged between a left rear wheel arranged outside of a left frame and a right rear wheel arranged outside of a right frame, the front end of the battery pack being located forward of an axle center of a rear wheel unit; a left motor that is arranged above the battery pack, in the periphery of the left rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the left rear wheel; and a right motor that is arranged above the battery pack, in the periphery of the right rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the right rear wheel.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: December 3, 2019
    Assignee: KUBOTA CORPORATION
    Inventors: Hirokazu Ito, Kazuo Koike, Yasuhiro Manji
  • Patent number: 10485175
    Abstract: A grass mower is provided with a plurality of rotating shafts passing through a ceiling wall of a mower deck and extending upward, disposed in a side-by-side state; cutting blades respectively linked to the rotating shafts in an internal space of the mower deck; an electric motor mounted at a location to the lateral outside relative to a rotation path of the cutting blades within the mower deck, and having an output shaft extending upward; and a power transmission mechanism positioned above the ceiling wall of the mower deck, and configured to transmit power from the output shaft to the rotating shafts of the cutting blades.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: November 26, 2019
    Assignee: Kubota Corporation
    Inventors: Hirokazu Ito, Kazuo Koike
  • Patent number: 10440885
    Abstract: Mower blade utilizes a blade portion formed on the blade main body and an air circulator portion formed on the blade main body and generating airflow via rotation centered around the vertically-oriented axis of the mower blade. The blade portion is arranged in a length-direction end portion of the blade main body and extends along a predetermined area in the length-direction. The air circulator portion is located opposite the blade portion in a width direction, has a rising upward portion, and extends along a predetermined area in the length-direction. A boundary portion is arranged between the blade main body and a rising upward portion of the air circulator portion has a portion inclined or angled with respect to the blade portion such that, beginning at the length-direction end portion, a distance between the boundary portion and the blade portion increases along the length-direction and moving toward the vertically-oriented axis.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: October 15, 2019
    Assignee: KUBOTA CORPORATION
    Inventors: Motosumi Shiotsuki, Akira Minoura, Kazuo Koike, Hirokazu Ito
  • Patent number: 10311791
    Abstract: The purpose of the present invention is to suppress the fluctuation of a data line voltage that occurs when an analog voltage signal is sampled and held in a data line in a display device provided with a current-driven display element. Transistors (SWr, SWG, SWb) of each demultiplexer (252) are successively switched on, for each predetermined period, in a selection period of a write control line (SW_LR(i)). In a period when the transistor (SWr) is switched on, an analog video signal (Dj) from a data voltage output unit circuit (211d) is applied to a data line (SLrj) and a pixel circuit (50r). When the transistor SWr is then switched off, the voltage held by the data line (SLrj) decreases below the voltage of the analog video signal (Dj) due to a parasitic capacitance (Cssdr). However, the voltage of a voltage fluctuation compensation line (G3_Cnt (i)) changes from a low level to a high level within the selection period.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: June 4, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masanori Ohara, Hideki Uchida, Katsuhiro Kikuchi, Satoshi Inoue, Yuto Tsukamoto, Eiji Koike, Kazuo Takizawa, Noboru Noguchi, Noritaka Kishi
  • Patent number: 10293853
    Abstract: A self-propelled vehicle includes a maneuvering unit, a drive unit including first and second drive sections, which are driven and controlled by drive wheel control commands, a drive wheel unit including left and right drive wheels driven by the first and second drive sections, respectively, at least one caster wheel which is controlled by a caster wheel control command, a bank detector for detecting a degree of bank of the vehicle and a control unit including a drive wheel control section for generating the drive wheel control commands. The control unit further includes a caster wheel control section which generates the caster wheel control command for controlling the steering angle of the caster wheel during a bank traversing travel, based on the bank degree so as to resolve a difference between a target travel and the actual travel which occurs during the bank traversing travel.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: May 21, 2019
    Assignee: Kubota Corporation
    Inventors: Kazuo Koike, Hirokazu Ito, Yoshikazu Togoshi
  • Patent number: 10112469
    Abstract: An electric work vehicle includes a left frame and a right frame extending in a vehicle fore/aft direction, a battery assembly mounted between the left frame and the right frame, a left rear wheel mounted outward of the left frame in a vehicle lateral direction, a right rear wheel mounted outward of the right frame in the vehicle lateral direction, a left motor mounted outward of the left frame in the vehicle lateral direction and forward of an axis of the left rear wheel for transmitting rotary driving power to the left rear wheel, and a right motor mounted outward of the right frame in the vehicle lateral direction and forward of an axis of the right rear wheel for transmitting rotary driving power to the right rear wheel.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: October 30, 2018
    Assignee: Kubota Corporation
    Inventors: Yuto Fujii, Hirokazu Ito, Kazuo Koike
  • Patent number: 10112645
    Abstract: A traveling vehicle including a traveling machine body supported by a pair of left and right driving wheels; a pair of left motor and the right motor configured to independently drive the driving wheels; a riding part disposed behind the traveling machine body and connected to the traveling machine body, and configured to enable riding of a worker; a handle connected to the traveling machine body so as to be swingable left and right with respect to the traveling machine body; a plurality of load sensors for detecting a forward and backward weight shift of the worker who is riding on the riding part; a rotation angle sensor for detecting a leftward and rightward swinging operation amount of the handle; and a controller for controlling operation of the left and right motors based on detection values by the plurality of load sensors and the rotation angle sensor.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: October 30, 2018
    Assignee: KUBOTA CORPORATION
    Inventors: Hirokazu Ito, Kazuo Koike, Yoshikazu Togoshi
  • Publication number: 20180304735
    Abstract: An electric work vehicle includes: a battery pack that is arranged between a left rear wheel arranged outside of a left frame and a right rear wheel arranged outside of a right frame, the front end of the battery pack being located forward of an axle center of a rear wheel unit; a left motor that is arranged above the battery pack, in the periphery of the left rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the left rear wheel; and a right motor that is arranged above the battery pack, in the periphery of the right rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the right rear wheel.
    Type: Application
    Filed: June 25, 2018
    Publication date: October 25, 2018
    Inventors: Hirokazu Ito, Kazuo Koike, Yasuhiro Manji
  • Publication number: 20180303027
    Abstract: A work vehicle includes a battery that outputs a DC power, at least two electric motors, and at least two inverters, each inverter being configured to convert the DC power from the battery into an AC power and to supply the AC power to one of the electric motors. The work vehicle further includes an accommodation box attachable/detachable to/from the vehicle body, the accommodation box accommodating a plurality of electrical equipments including the inverters.
    Type: Application
    Filed: November 29, 2017
    Publication date: October 25, 2018
    Inventors: Kazuo Koike, Hirokazu Ito
  • Patent number: 10063016
    Abstract: An electric connector includes a socket connector, a bar-like plug connector to be inserted/withdrawn to/from the socket connector and a fuse. When the plug connector is inserted to the socket connector, electric conduction is established in the electric circuit via the fuse. The fuse is attached to the socket connector.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: August 28, 2018
    Assignees: Kubota Corporation, DDK Ltd.
    Inventors: Hirokazu Ito, Kazuo Koike, Masatake Takai, Koichi Yokota, Kazuyuki Ozai
  • Publication number: 20180235149
    Abstract: A grass mower is provided with a plurality of rotating shafts passing through a ceiling wall of a mower deck and extending upward, disposed in a side-by-side state; cutting blades respectively linked to the rotating shafts in an internal space of the mower deck; an electric motor mounted at a location to the lateral outside relative to a rotation path of the cutting blades within the mower deck, and having an output shaft extending upward; and a power transmission mechanism positioned above the ceiling wall of the mower deck, and configured to transmit power from the output shaft to the rotating shafts of the cutting blades.
    Type: Application
    Filed: April 20, 2018
    Publication date: August 23, 2018
    Inventors: Hirokazu Ito, Kazuo Koike
  • Patent number: 10029551
    Abstract: An electric work vehicle includes: a battery pack that is arranged between a left rear wheel arranged outside of a left frame and a right rear wheel arranged outside of a right frame, the front end of the battery pack being located forward of an axle center of a rear wheel unit; a left motor that is arranged above the battery pack, in the periphery of the left rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the left rear wheel; and a right motor that is arranged above the battery pack, in the periphery of the right rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the right rear wheel.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: July 24, 2018
    Assignee: Kubota Corporation
    Inventors: Hirokazu Ito, Kazuo Koike, Yasuhiro Manji
  • Patent number: 10021831
    Abstract: An electric work vehicle includes a casing structure connected to a vehicle frame and having a central casing, a left casing, and a right casing. The vehicle further includes a left rear wheel supported by the left casing, a right rear wheel supported by the right casing, a left motor housed in a left region of the central casing, a right motor housed in a right region of the central casing, a left transmission mechanism housed in the left casing for transmitting power from the left motor to the left rear wheel, and a right transmission mechanism housed in the right casing for transmitting power from the right motor to the right rear wheel.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: July 17, 2018
    Assignee: Kubota Corporation
    Inventors: Hirokazu Ito, Kazuo Koike
  • Patent number: 10020470
    Abstract: A battery pack (6) for an electric work vehicle includes a battery unit (6A), a casing (60) for tightly housing the battery unit (6A), a circulation fan (6B) mounted in an inner space of the casing (60), and an air guide (50) provided in the casing (60) to direct cooling air produced by the circulation fan (6B) to the battery unit (6A).
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: July 10, 2018
    Assignee: Kubota Corporation
    Inventors: Hirokazu Ito, Kazuo Koike
  • Patent number: 9981544
    Abstract: An electric work vehicle includes a left motor 4L that drives a left drive wheel 12L and a right motor 4R that drives a right drive wheel 12R, a cooling liquid circulation flow path 7 connected to the left motor 4L and the right motor 4R, and a cooling liquid distribution mechanism 6 that, according to a travel state, adjusts a ratio between a cooling liquid flow amount that flows from a pump 72 disposed on the cooling liquid circulation flow path 7 to the left motor 4L, and a cooling liquid flow amount that flows from the pump 72 to the right motor 4R.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: May 29, 2018
    Assignee: Kubota Corporation
    Inventors: Hirokazu Ito, Kazuo Koike
  • Patent number: 9949436
    Abstract: A grass mower is provided with a plurality of rotating shafts passing through a ceiling wall of a mower deck and extending upward, disposed in a side-by-side state; cutting blades respectively linked to the rotating shafts in an internal space of the mower deck; an electric motor mounted at a location to the lateral outside relative to a rotation path of the cutting blades within the mower deck, and having an output shaft extending upward; and a power transmission mechanism positioned above the ceiling wall of the mower deck, and configured to transmit power from the output shaft to the rotating shafts of the cutting blades.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: April 24, 2018
    Assignee: Kubota Corporation
    Inventors: Hirokazu Ito, Kazuo Koike
  • Patent number: 9937779
    Abstract: Vehicle according to the present invention includes a traveling vehicle body and left and right drive wheels. Left and right propulsion motors drive the left and right drive wheels. A battery supplies electric power to the left and right propulsion motors. The left and right drive wheels are positioned on two width-direction ends of the traveling vehicle body. The left and right propulsion motors are positioned on the traveling vehicle body so as to align with the left and right drive wheels in the width direction of the vehicle body. The battery is positioned in a battery installation space of the traveling vehicle body. The battery installation space is located in at least a space located below the left and right propulsion motors.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: April 10, 2018
    Assignee: KUBOTA CORPORATION
    Inventors: Kazuo Koike, Hirokazu Ito, Takafumi Komatsu