Patents by Inventor Ryosuke Kinugawa

Ryosuke Kinugawa 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: 20190200277
    Abstract: A communication system for a working machine includes a communication device disposed on the working machine, and a mobile terminal to be connected to the communication device, the mobile terminal having a first application and a second application. The communication device has a first communication circuit to transmit, to the mobile terminal, a beacon including a first application identifier corresponding to the first application, and a second application identifier corresponding to the second application. And, the mobile terminal has a calculation circuit to execute the second application after the first application is activated.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 27, 2019
    Applicant: KUBOTA CORPORATION
    Inventors: Ryosuke KINUGAWA, Keisuke EGASHIRA, Keisuke MIURA
  • Patent number: 10316496
    Abstract: A hydraulic system for a work machine includes a hydraulic pump to supply a pilot fluid, and a hydraulic switch valve to be switched to a plurality of switching positions based on a pilot pressure. The pilot pressure is a pressure of the pilot fluid supplied from the hydraulic pump. The hydraulic system includes a direction switch valve to apply a first pilot pressure to the hydraulic switch valve to switch the hydraulic switch valve into one of the plurality of switching positions. The hydraulic system includes a pressure applying device to apply a second pilot pressure to the hydraulic switch valve. The second pilot pressure is lower than the first pilot pressure.
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: June 11, 2019
    Assignee: KUBOTA CORPORATION
    Inventors: Yuji Fukuda, Kazuyoshi Arii, Keisuke Miura, Ryosuke Kinugawa, Ikuhiro Uotani, Satoshi Tajima, Ryohei Sumiyoshi, Kunihiro Suzuki
  • Patent number: 10316493
    Abstract: A hydraulic system includes a hydraulic pump to discharge an operation fluid, a hydraulic device to be operated by the operation fluid, a plurality of hydraulic pressure controllers each to change an operation state of the hydraulic pressure controller based on a pressure of the operation fluid so as to control the hydraulic device, and a proportional valve connected to the plurality of hydraulic pressure controllers. The proportional valve is configured to set a pressure of the operation fluid supplied to the hydraulic pressure controllers.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: June 11, 2019
    Assignee: KUBOTA CORPORATION
    Inventors: Yuji Fukuda, Hiroaki Nakagawa, Kazuyoshi Arii, Keisuke Miura, Ryosuke Kinugawa
  • Publication number: 20190100900
    Abstract: A hydraulic system for a working machine, includes a hydraulic device to change a flow rate of an operation fluid. The hydraulic device includes a first hydraulic receiver to which the operation fluid is applied, a second hydraulic receiver to which the operation fluid is applied, and a movable portion to be moved by the operation fluid applied to any one of the first hydraulic receiver and the second hydraulic portion. A hydraulic system further includes a differential pressure regulator to supply the operation fluid to the first hydraulic receiver and the second hydraulic receiver, the differential pressure regulator being configured to regulate a differential pressure between a first pressure that is a pressure of the operation fluid applied to the first hydraulic receiver and a second pressure that is a pressure of the operation fluid applied to the second hydraulic receiver.
    Type: Application
    Filed: October 2, 2018
    Publication date: April 4, 2019
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Tsuyoshi MATSUMOTO, Ryosuke KINUGAWA, Jun TOMITA, Nozomu MINAGAWA
  • Publication number: 20180354458
    Abstract: An anti-theft system for a working machine, includes a communication device disposed on the working machine, the communication device having a first communicator, a mobile terminal having a storage to store authentication information, and a second communicator, and a control device disposed on the working machine, the control device having an authentication processor to execute an authentication processing that determines whether to provide a permission of driving a driving portion of the working machine based on the authentication information. The first communicator sends a beacon to the mobile terminal before the authentication processing of the authentication processor is executed. The second communicator sends the authentication information to the communication device after receiving the beacon, the authentication information being stored by the storage.
    Type: Application
    Filed: June 6, 2018
    Publication date: December 13, 2018
    Applicant: KUBOTA CORPORATION
    Inventors: Ryosuke KINUGAWA, Keisuke MIURA, Keisuke EGASHIRA
  • Publication number: 20180298805
    Abstract: A cooling control system for a working machine includes a fan, a housing to which the fan is attached, a prime mover having an output shall, a rotor to be rotated by a rotating power of the output shaft and to be rotated with the housing by a fluid introduced to a gap formed between the housing and the rotor, a fluid setting circuit to set an introduction amount of the fluid introduced to the gap, and a control device to control the fluid setting circuit to control the fan. The control device includes a setting circuit to set a target rotation speed of the fan based on a responsiveness of an actual rotation speed of the fan at time of changing of the target rotation speed of the fan.
    Type: Application
    Filed: June 21, 2018
    Publication date: October 18, 2018
    Applicant: KUBOTA CORPORATION
    Inventors: Ryosuke KINUGAWA, Nozomu MINAGAWA, Hiroshi TATSUMI, Keisuke MIURA, Makoto NOGUCHI
  • Publication number: 20180180068
    Abstract: A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.
    Type: Application
    Filed: December 26, 2017
    Publication date: June 28, 2018
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Keigo HONDA, Ryosuke KINUGAWA, Ryuki NISHIMOTO, Yuji YAMASHITA, Daisuke SAKURAI
  • Patent number: 10006188
    Abstract: A hydraulic motor has a primary side and a secondary side. A hydraulic pump is to be driven by the engine to supply an operation fluid to the primary side. A bypass circuit is to connect the primary side and the secondary side. An electromagnetic valve is configured to control a flowing amount of the operation fluid in the bypass circuit to control an amount of the operation fluid supplied to the primary side. A filter is disposed in a fluid tube connected to the secondary side. A relief valve is disposed between the hydraulic pump and the primary side. A controller is to control the electromagnetic valve to drive the hydraulic motor in a case where a temperature of the operation fluid is low when the engine is started.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: June 26, 2018
    Assignee: KUBOTA CORPORATION
    Inventors: Yuji Fukuda, Hiroaki Nakagawa, Kazuyoshi Arii, Ryosuke Kinugawa
  • Patent number: 9988794
    Abstract: A flow rate setting system of a working machine, includes: an attachment configured to be attached to the working machine; a control part configured to control a flow of hydraulic operation fluid based on a maximum flow rate of the hydraulic operation fluid being to be supplied to the attachment, the control part being mounted on the working machine; and a mobile terminal configured to communicate in wireless communication, the mobile terminal including: a first obtaining part configured to obtain identification information, the identification information being used for identifying the attachment; a second obtaining part configured to obtain the maximum flow rate of the attachment; and an output part configured to output the identification information and the maximum flow rate to the working machine in the wireless communication, the identification information being obtained by the first obtaining part, the maximum flow rate being obtained by the second obtaining part.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: June 5, 2018
    Assignee: KUBOTA CORPORATION
    Inventors: Keisuke Miura, Ryosuke Kinugawa
  • Publication number: 20170370073
    Abstract: A work machine includes a prime mover, a hydraulic pump to be operated by the prime mover to output an operation fluid, a hydraulic device to be operated by the operation fluid, a measurement sensor to measure a first temperature and a second temperature, the first temperature being a temperature of the operation fluid at starting of the prime mover, the second temperature being a temperature of the operation fluid after the starting of the prime mover, and a controller including a determiner to determine an upper limit revolution speed based on the first temperature, the upper limit revolution speed being an upper limit of a revolution speed of the prime mover, and a changer to change the upper limit revolution speed based on the second temperature.
    Type: Application
    Filed: June 19, 2017
    Publication date: December 28, 2017
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Ryosuke KINUGAWA
  • Publication number: 20170282934
    Abstract: A hydraulic system for a work machine includes a prime mover, a setup member, a hydraulic pump, an operation valve, a hydraulic device, and a memory. The memory stores first control characteristics indicating relations between the first pressure and an actual revolution speed of the prime mover, and stores a second control characteristic indicating a relation between the first pressure and the actual revolution speed of the prime mover. The hydraulic system includes a controller to set the first pressure based on the second control characteristic when a dropping amount of the actual revolution speed from the target revolution speed is less than a threshold value and to set the first pressure based on the first control characteristics determined corresponding to the target revolution speed when the dropping amount of the actual revolution speed from the target revolution speed is the threshold value or more.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 5, 2017
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Ryosuke KINUGAWA, Kazuyoshi ARII
  • Publication number: 20170284063
    Abstract: A hydraulic system for a work machine includes a hydraulic bump to output an operation fluid, a hydraulic switch valve to be switched among switching positions in accordance with a pressure of the operation fluid, a proportional valve to change the pressure of the operation fluid applied to the hydraulic switch valve, a travel hydraulic device to change a thrust power in accordance with the switching positions of the hydraulic switch valve. And, the hydraulic system includes a controller to control the proportional valve in accordance with a state of the travel hydraulic device.
    Type: Application
    Filed: March 30, 2017
    Publication date: October 5, 2017
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Daiki ABE, Jun TOMITA, Yuya KONISHI, Ryosuke KINUGAWA
  • Publication number: 20170107696
    Abstract: A work machine includes an engine, a pilot pump to be driven by the engine to supply a pilot fluid, an operation pump to receive a first pilot fluid to change an output power in accordance with the first pilot fluid, a pilot fluid tube provided between the pilot pump and the operation pump, an operation valve connected to the pilot fluid tube to output the first pilot fluid, the first pilot fluid being a part of the pilot fluid supplied from the pilot fluid, a temperature sensor to measure a temperature of at least one of an operation fluid including the pilot fluid, a cooling water, an engine oil, and an outside air, and a pressure controller to control a first pilot pressure of the pilot fluid outputted from the operation valve when a temperature measured by the temperature sensor is equal to or higher than a first temperature.
    Type: Application
    Filed: December 27, 2016
    Publication date: April 20, 2017
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Ryosuke KINUGAWA, Hiroaki NAKAGAWA
  • Publication number: 20170107695
    Abstract: A hydraulic system for a work machine includes a hydraulic pump to supply a pilot fluid, and a hydraulic switch valve to be switched to a plurality of switching positions based on a pilot pressure. The pilot pressure is a pressure of the pilot fluid supplied from the hydraulic pump. The hydraulic system includes a direction switch valve to apply a first pilot pressure to the hydraulic switch valve to switch the hydraulic switch valve into one of the plurality of switching positions. The hydraulic system includes a pressure applying device to apply a second pilot pressure to the hydraulic switch valve. The second pilot pressure is lower than the first pilot pressure.
    Type: Application
    Filed: December 26, 2016
    Publication date: April 20, 2017
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Kazuyoshi ARII, Keisuke MIURA, Ryosuke KINUGAWA, Ikuhiro UOTANI, Satoshi TAJIMA, Ryohei SUMIYOSHI, Kunihiro SUZUKI
  • Patent number: 9624646
    Abstract: A working machine includes: a first switch operable to set an operation amount; a second switch operable by being pressed; a control unit capable of detecting an operation of the first switch and an operation of the second switch, the control unit outputting a control signal based on the operation amount of the first switch and continuously outputting the control signal when the operation of the first switch is detected after detecting a release of the operation of the second switch under a state where the operation of the second switch is detected; an actuator configured to be activated by a hydraulic operation fluid; a solenoid valve capable of controlling, based on the control signal, a pilot pressure; and a control valve configured to supply, based on the pilot pressure, the hydraulic operation fluid to the actuator.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: April 18, 2017
    Assignee: KUBOTA CORPORATION
    Inventors: Masahiro Kuroda, Ryosuke Kinugawa, Naohiro Saijo
  • Patent number: 9534551
    Abstract: In a backhoe comprising: a diesel engine able to increase a speed due to an accelerating operation; an exhaust gas cleaning device having a DPF for catching a particulate matter included in an exhaust gas exhausted from the diesel engine; and a filter regeneration means to combust and remove the particulate matter deposited in the DPF of the exhaust gas cleaning device, the filter regeneration means requires to increase the speed of the diesel engine during an automatic regeneration for automatically combusting and removing the particulate matter deposited in the DPF. In this manner, a working machine able to require an operator to increase the speed of the diesel engine at appropriate timing, in order to increase a temperature of the exhaust gas to a temperature required for regeneration of the DPF can be provided.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: January 3, 2017
    Assignee: KUBOTA CORPORATION
    Inventors: Keisuke Miura, Hiroaki Nakagawa, Ryosuke Kinugawa, Atsushi Matsumoto, Teruo Kunizawa, Ikuhiro Uotani, Masaru Soejima, Satoshi Tajima
  • Publication number: 20160305093
    Abstract: A hydraulic motor has a primary side and a secondary side. A hydraulic pump is to be driven by the engine to supply an operation fluid to the primary side. A bypass circuit is to connect the primary side and the secondary side. An electromagnetic valve is configured to control a flowing amount of the operation fluid in the bypass circuit to control an amount of the operation fluid supplied to the primary side. A filter is disposed in a fluid tube connected to the secondary side. A relief valve is disposed between the hydraulic pump and the primary side. A controller is to control the electromagnetic valve to drive the hydraulic motor in a case where a temperature of the operation fluid is low when the engine is started.
    Type: Application
    Filed: June 27, 2016
    Publication date: October 20, 2016
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Hiroaki NAKAGAWA, Kazuyoshi ARII, Ryosuke KINUGAWA
  • Patent number: 9437098
    Abstract: To accurately grasp a generation situation of a warning generated in an operation machine, the operation machine is provided with: warning generation means 55 adapted to determine whether or not there is abnormality, and in the case where there is abnormality, generate a warning; warning storage means 56 adapted to store warning information on the warning; display means adapted to display the warning information stored in the warning storage means 56; and warning erasing means adapted to erase the warning information, wherein the warning storage means 56 is configured to store warning information on a warning generated after the erasure by the warning erasing means 57.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: September 6, 2016
    Assignee: KUBOTA CORPORATION
    Inventors: Ryosuke Kinugawa, Atsushi Matsumoto, Keisuke Miura
  • Publication number: 20160230370
    Abstract: A hydraulic system includes a hydraulic pump to discharge an operation fluid, a hydraulic device to be operated by the operation fluid, a plurality of hydraulic pressure controllers each to change an operation state of the hydraulic pressure controller based on a pressure of the operation fluid so as to control the hydraulic device, and a proportional valve connected to the plurality of hydraulic pressure controllers. The proportional valve is configured to set a pressure of the operation fluid supplied to the hydraulic pressure controllers.
    Type: Application
    Filed: January 5, 2016
    Publication date: August 11, 2016
    Applicant: KOBOTA CORPORATION
    Inventors: Yuji Fukuda, Hiroaki Nakagawa, Kazuyoshi Arii, Keisuke Miura, Ryosuke Kinugawa
  • Patent number: 9316310
    Abstract: A pressure control valve for controlling a travel primary side pressure that is a pressure of a primary side of a travel operation device is controlled by a control unit, thus the travel primary side pressure is controlled, and thereby a traveling speed is intended to be increased, preventing an engine stall.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: April 19, 2016
    Assignee: KUBOTA CORPORATION
    Inventors: Ryosuke Kinugawa, Keisuke Miura, Isao Tanaka, Kazuyoshi Arii, Yuji Fukuda