Patents by Inventor Tetsuji Tanaka

Tetsuji Tanaka 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: 11101592
    Abstract: A connector holding structure is provided with a plurality of connectors to be connected to a plurality of mating connectors arranged in an arrangement direction, a plurality of wires drawn out from the plurality of connectors, and a connector holding member including a plurality of connector mounting portions for respectively holding the plurality of connectors, the connector holding member collectively holding the plurality of connectors. The connector holding member includes a deflectable and deformable flexible portion between adjacent ones of the plurality of connector mounting portions.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: August 24, 2021
    Inventors: Kosuke Sone, Kaho Hayashi, Tetsuji Tanaka, Makoto Higashikozono, Keishi Kitamura, Yasuto Takeda, Takahiro Maruyama
  • Publication number: 20210189690
    Abstract: Provided is a loading work vehicle capable of improving work efficiency even when working on a slippery road surface. An HST-traveling-drive wheel loader 1 comprises a step-on amount detection sensor 610, a discharge pressure detection sensor 75, a mode switch device 60, and a controller 5. The controller 5 is configured to: determine whether a limit mode is selected by the mode switch device 60; specify an operation state of the wheel loader 1 when determining that the limit mode is selected; limit maximum traction force to a first set value which is set based on a static friction coefficient ? and vehicle weight when specifying that a bucket 23 is pushed into a natural ground 100; and increase the maximum traction force from the first set value when specifying that excavation of the natural ground 100 is started.
    Type: Application
    Filed: September 28, 2018
    Publication date: June 24, 2021
    Inventors: Koji HYODO, Masaki YOSHIKAWA, Tetsuji TANAKA, Masaki NUKII
  • Publication number: 20210083418
    Abstract: A connector holding structure is provided with a plurality of connectors to be connected to a plurality of mating connectors arranged in an arrangement direction, a plurality of wires drawn out from the plurality of connectors, and a connector holding member including a plurality of connector mounting portions for respectively holding the plurality of connectors, the connector holding member collectively holding the plurality of connectors. The connector holding member includes a deflectable and deformable flexible portion between adjacent ones of the plurality of connector mounting portions.
    Type: Application
    Filed: July 24, 2018
    Publication date: March 18, 2021
    Inventors: Kosuke Sone, Kaho Hayashi, Tetsuji Tanaka, Makoto Higashikozono, Keishi Kitamura, Yasuto Takeda, Takahiro Maruyama
  • Patent number: 10947701
    Abstract: Provided is a working vehicle capable of, while reducing fuel consumption, improving traveling performance only when high traveling performance is required. A wheel loader 1 comprises: an engine 3; a variable displacement HST pump 41; a variable displacement HST motor 42 connected to the HST pump 41 through a closed circuit; pressure sensors 72A, 72B configured to load pressure of the HST motor 42; and a controller 5, wherein the controller 5 is configured to, in a case of determining that a load pressure detection value P is included in a predetermined pressure range of greater than load pressure P? corresponding to flat ground traveling and smaller than load pressure P? corresponding to an excavation operation, increase maximum rotational speed of the engine 3 only within the predetermined pressure range.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: March 16, 2021
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Koji Hyodo, Tetsuji Tanaka, Isamu Aoki, Masaki Nukii, Yuki Ahiko
  • Publication number: 20210047801
    Abstract: Provided is a working vehicle capable of increasing lifting operation speed of a working device without increasing cost, even when provided with a circuit configuration that prioritizes a steering operation over a working device operation. A wheel loader 1 comprises a priority valve 451 configured to allow hydraulic oil discharged from a hydraulic pump 41 to flow into a steering drive circuit 43 preferentially over a working device drive circuit 44, and further comprises: an electric steering lever 30; a pair of solenoid control valves 34A, 34B configured to control a steering directional control valve 33; and a controller 5. The controller 5 is configured to control the pair of solenoid control valves 34A, 34B so as to limit operation speed of a steering 3 when determining that an engine 40 is in a low idle state and a lift arm 21 is performing a lifting operation.
    Type: Application
    Filed: September 24, 2019
    Publication date: February 18, 2021
    Inventors: Tetsuji TANAKA, Koji HYODO, Yasunori MIYAMOTO, Isamu AOKI
  • Patent number: 10895062
    Abstract: Provide is a loading vehicle capable of quickly operating an object handling device in the upward direction while traveling forward. A wheel loader 1 comprises an engine 3, an HST pump 41, an HST motor 42, a forward/reverse changeover switch 62, a step-on amount sensor 610, a pressure sensor 73, and a controller 5. In a case where a specific condition for specifying lifting operation of a lift arm 21 during forward traveling of the vehicle body is satisfied, the controller 5 increases maximum rotational speed of the engine to a predetermined value Nmax2 which is greater than maximum engine rotational speed Nmax1 during traveling on the flat ground, and limit maximum vehicle speed to a predetermined value Vmax2 which is smaller than maximum vehicle speed Vmax1 prior to the lifting operation of the lift arm 2.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: January 19, 2021
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Koji Hyodo, Yuki Ahiko, Tetsuji Tanaka, Isamu Aoki, Masaki Nukii, Masashi Yamashita
  • Publication number: 20210002865
    Abstract: Provided is a working vehicle capable of, while reducing fuel consumption, improving traveling performance only when high traveling performance is required. A wheel loader 1 comprises: an engine 3; a variable displacement HST pump 41; a variable displacement HST motor 42 connected to the HST pump 41 through a closed circuit; pressure sensors 72A, 72B configured to load pressure of the HST motor 42; and a controller 5, wherein the controller 5 is configured to, in a case of determining that a load pressure detection value P is included in a predetermined pressure range of greater than load pressure Pa corresponding to flat ground traveling and smaller than load pressure P? corresponding to an excavation operation, increase maximum rotational speed of the engine 3 only within the predetermined pressure range.
    Type: Application
    Filed: September 24, 2019
    Publication date: January 7, 2021
    Inventors: Koji HYODO, Tetsuji TANAKA, Isamu AOKI, Masaki NUKII, Yuki AHIKO
  • Publication number: 20200388890
    Abstract: A coolant includes a refrigerant, a porous plate-shaped heat insulator, and an enclosure in which the refrigerant and the heat insulator are enclosed in a sealed state, and the heat insulator has a thermal conductivity per unit area of 300 W/(K·m2) or less and a thickness equal to or greater than 0.5 mm and equal to or less than 10.0 mm.
    Type: Application
    Filed: September 13, 2018
    Publication date: December 10, 2020
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., Sumitomo Wiring Systems, Ltd., AutoNetworks Technologies, Ltd.
    Inventors: Koma NUMATA, Masatoshi MAJIMA, Kazuki OKUNO, Hiroki HIRAI, Tetsuji TANAKA, Makoto HIGASHIKOZONO, Junichi ONO
  • Publication number: 20200378089
    Abstract: Provide is a loading vehicle capable of quickly operating an object handling device in the upward direction while traveling forward. A wheel loader 1 comprises an engine 3, an HST pump 41, an HST motor 42, a forward/reverse changeover switch 62, a step-on amount sensor 610, a pressure sensor 73, and a controller 5. In a case where a specific condition for specifying lifting operation of a lift arm 21 during forward traveling of the vehicle body is satisfied, the controller 5 increases maximum rotational speed of the engine to a predetermined value Nmax2 which is greater than maximum engine rotational speed Nmax1 during traveling on the flat ground, and limit maximum vehicle speed to a predetermined value Vmax2 which is smaller than maximum vehicle speed Vmax1 prior to the lifting operation of the lift arm 2.
    Type: Application
    Filed: September 28, 2018
    Publication date: December 3, 2020
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koji HYODO, Yuki AHIKO, Tetsuji TANAKA, Isamu AOKI, Masaki NUKII, Masashi YAMASHITA
  • Publication number: 20200362540
    Abstract: A work vehicle is provided. The work vehicle is capable of notifying an operator of a state close to overheating of a temperature of a cooling oil that cools a brake device before the temperature overheats. A controller (10) in a work vehicle (100) compares each detection value detected from a brake pressure sensor (26) and a vehicle speed sensor (15) to each threshold (V1, P1, R1) predetermined corresponding to each sensor. The controller (10) outputs a warning command that a temperature of a cooling oil is likely to overheat to a notification device (28) when a state that at least one detection value is equal to or more than the threshold and when a state that at least one detection value is equal to or more than the threshold continues for a first duration (t1) or more.
    Type: Application
    Filed: March 15, 2019
    Publication date: November 19, 2020
    Inventors: Koji HYODO, Tetsuji TANAKA, Isamu AOKI, Kouji SHIMAZAKI
  • Patent number: 10773590
    Abstract: The present invention relates to a work vehicle including an engine, a hydraulic pump, a hydraulic motor to drive wheels, an HST circuit in which the hydraulic pump and the hydraulic motor are connected to each other in the form of a closed circuit, a reducing agent sensor that detects the state of a reducing agent used to clean exhaust gas from the engine, and an engine restrictor that restricts the rotational speed of the engine based on the output from the reducing agent sensor, and the work vehicle further includes a control unit that changes the tilting angle of the hydraulic pump or the hydraulic motor independently of the rotational speed of the engine to a tilting angle associated with minimum travel drive force necessary for self-travel of the work vehicle when the control unit determines that the engine restrictor has restricted the rotational speed of the engine.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: September 15, 2020
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Masaki Nukii, Koji Hyodo, Isamu Aoki, Tetsuji Tanaka
  • Patent number: 10767342
    Abstract: The work vehicle includes an engine, a radiator; a hydraulic pump; a cooling fan that blows a cooling air to the radiator; a hydraulic motor which is driven by a pressure oil delivered from the hydraulic pump, and rotates the cooling fan; a directional control valve that switches a flow direction of the pressure oil from the hydraulic pump to rotate the hydraulic motor in forward and reverse directions; and a controller that controls the directional control valve so as to cause the repetitive operation of the forward and reverse rotation of the cooling fan to be performed at predetermined time intervals, in which the controller reduces the time intervals more than a normal time initially set when a relationship between the outside air temperature detected by the outside air temperature sensor and the refrigerant temperature detected by the refrigerant temperature sensor satisfies a predetermined condition.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: September 8, 2020
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koji Hyodo, Isamu Aoki, Tetsuji Tanaka, Koji Shimazaki
  • Publication number: 20200248436
    Abstract: A wheel loader is provided that can reduce the traveling distance required for a raise and run operation, and reduce fuel consumption. A wheel loader 1 includes: an engine 3; a torque converter 41; a forward and reverse switch 62; a stepping amount sensor 610; an operation amount sensor 73; and a controller 5. The controller 5 determines whether a specific condition for specifying an operation of the lift arm 21 in an upper direction during forward travel of the vehicle body, on the basis of a forward and reverse switching signal, the stepping amount on the accelerator pedal 61, and a pilot pressure Ti pertaining to the lifting operation amount for the lift aim 21. When the specific condition is satisfied, the vehicle speed is limited by reducing the maximum rotational speed of the engine 3 in response to increase in the pilot pressure Ti.
    Type: Application
    Filed: September 4, 2018
    Publication date: August 6, 2020
    Inventors: Koji HYODO, Isamu AOKI, Tetsuji TANAKA, Koji SHIMAZAKI, Hironao SUZUKI
  • Patent number: 10704223
    Abstract: Provided is a work vehicle which is capable of appropriately setting the height of a work tool as a control threshold value for a ride control device or an automatic transmission control device, and which is excellent in operability, travel stability, and work efficiency. A value detected by an angle sensor (39) when a signal import switch (46) is operated by an operator is stored in a height position storage unit (35b) of a main controller (35) as height position information about a bucket (13) for excavation work. In the height position storage unit (35b), the height position of the bucket (13) for hauling work and the height position of the bucket (13) for loading work are stored in advance as offset values from the height position information about the bucket (13) for excavation work. In this way, the ride control device or the automatic transmission control device can be appropriately controlled regardless of the preference or habit of the operator.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: July 7, 2020
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Isamu Aoki, Koji Hyodo, Tetsuji Tanaka, Keigo Kikuchi
  • Publication number: 20200208377
    Abstract: Provided is a wheel loader capable of moving up a lift arm in a short time during excavation work. A wheel loader comprises a controller configured to control maximum traction force of the wheel loader and input torque of a working device hydraulic pump, and include a specific condition determination section configured to determine whether a specific condition for specifying excavation work is satisfied, an elapsed time measurement section configured to measure an elapsed time from start of the excavation work, and an input torque control section configured to limit the input torque to a first input torque value when the specific condition is satisfied and increase the input torque from the first input torque value when a second set time elapses from the elapse of a first set time.
    Type: Application
    Filed: December 26, 2018
    Publication date: July 2, 2020
    Inventors: Koji HYODO, Tetsuji TANAKA, Isamu AOKI, Kouji SHIMAZAKI, Jumpei KAMIYA
  • Publication number: 20200199852
    Abstract: A wheel loader is provided that can suppress abrupt change in vehicle speed accompanied by erroneous determination on a lift arm lifting operation. A wheel loader includes: an engine; an HST pump; an HST motor; a forward and reverse switch; a stepping amount sensor; an operation amount sensor; and a controller. The controller determines whether a specific condition for specifying an operation of the lift arm in an upper direction during forward travel of the vehicle body, on the basis of a forward and reverse switching signal, the stepping amount, and a pilot pressure pertaining to the lifting operation for the lift arm. In a case of the specific condition being satisfied, the vehicle speed is limited by controlling the displacement volume of the HST motor in conformity with increase in the pilot pressure.
    Type: Application
    Filed: September 4, 2018
    Publication date: June 25, 2020
    Inventors: Koji HYODO, Isamu AOKI, Tetsuji TANAKA, Masaki NUKII
  • Publication number: 20200141434
    Abstract: A method of manufacturing a metal member-welded structure includes: a preparing step of preparing an Al alloy member formed of an Al-based alloy and a Cu member containing Cu as a main component; and a welding step of applying laser from a side of the Al alloy member to the Al alloy member and the Cu member disposed to face each other, and welding the Al alloy member and the Cu member to each other. The Al-based alloy contains, as an additional element, one of: 1 mass % or more and 17 mass % or less of Si; 0.05 mass % or more and 2.5 mass % or less of Fe; and 0.05 mass % or more and 2.5 mass % or less of Mn. A laser applying condition satisfies an output of 550 W or more and a scanning rate of 10 min/sec or more.
    Type: Application
    Filed: May 30, 2018
    Publication date: May 7, 2020
    Applicants: Sumitomo Electric Industries, Ltd., AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd.
    Inventors: Koki SUGIMURA, Kazuhiro GOTO, Tetsuya KUWABARA, Hiroki HIRAI, Junichi ONO, Tetsuji TANAKA, Osamu NAKAYAMA, Kazuaki HAMADA, Kenji MIYAMOTO
  • Publication number: 20200044215
    Abstract: Disclosed is a base plate structure for an electricity storage pack including an electricity storage module including a plurality of electricity storage elements, the base plate structure including: a unit base plate that has a shape having a plurality of sides in a plan view, and on which at least one electricity storage module is to be placed; and a wiring member that is to be connected to the electricity storage module. The unit base plate includes: a plurality of unit routing grooves configured to route the wiring member such that a routing direction of the wiring member can be changed; and a unit coupling portion that is formed on each of the sides, and that is configured to couple the unit base plate to another unit base plate.
    Type: Application
    Filed: April 2, 2018
    Publication date: February 6, 2020
    Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiroshi SHIMIZU, Hiroki HIRAI, Tetsuji TANAKA, Ryouya OKAMOTO, Hitoshi TAKEDA, Ken FURUSAWA, Tomoki IDOTA, Yuki FUJIMURA
  • Publication number: 20200011025
    Abstract: The work vehicle includes an engine, a radiator; a hydraulic pump; a cooling fan that blows a cooling air to the radiator; a hydraulic motor which is driven by a pressure oil delivered from the hydraulic pump, and rotates the cooling fan; a directional control valve that switches a flow direction of the pressure oil from the hydraulic pump to rotate the hydraulic motor in forward and reverse directions; and a controller that controls the directional control valve so as to cause the repetitive operation of the forward and reverse rotation of the cooling fan to be performed at predetermined time intervals, in which the controller reduces the time intervals more than a normal time initially set when a relationship between the outside air temperature detected by the outside air temperature sensor and the refrigerant temperature detected by the refrigerant temperature sensor satisfies a predetermined condition.
    Type: Application
    Filed: September 4, 2018
    Publication date: January 9, 2020
    Inventors: Koji HYODO, Isamu AOKI, Tetsuji TANAKA, Koji SHIMAZAKI
  • Patent number: 10483508
    Abstract: In a battery wiring module that is to be attached from a Y-axis direction (second direction) to a single battery group in which multiple single batteries that have electrode terminals are aligned in the X-axis direction (first direction), multiple holding units that are coupled in the X-axis direction and constitute a holding plate are each provided with a locking hook including a first locking surface and a second locking surface, and a locked hook that includes a first locked surface and a second locked surface, and by relatively sliding the holding units in the X-axis direction, the holding units can be coupled in a first locking state in which the first locked surface is locked to the second locking surface, or in a second locking state in which the first locked surface is locked to the first locking surface of the locking hook and the second locked surface is locked to the second locking surface.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: November 19, 2019
    Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiroshi Shimizu, Hiroki Hirai, Tetsuji Tanaka, Ryouya Okamoto, Hitoshi Takeda