Patents by Inventor Masayuki Yunoue
Masayuki Yunoue 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: 20240093463Abstract: There is provided a construction machine that makes it possible to easily return the posture of an earth removal plate from a rocking posture to a predetermined normal posture.Type: ApplicationFiled: January 18, 2022Publication date: March 21, 2024Inventors: Keisuke SAKISAKA, Masayuki YUNOUE, Masaya HARADA, Takuya NOMURA
-
Patent number: 11352765Abstract: A controller mounted on a small-sized hydraulic excavator includes an engine restart section that restarts an engine when a horn switch operation determining section determines that a horn switch is operated and a gate lock lever position determining section determines that a gate lock lever is at a lock position in a case where a restart standby time determining section determines that restart standby time does not yet elapse after the engine is automatically stopped by an idling stop function, and a power supply stopping section that stops an electric power supply of a vehicle body when the restart standby time determining section determines that the restart standby time has elapsed.Type: GrantFiled: May 31, 2018Date of Patent: June 7, 2022Assignee: HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD.Inventors: Hitoshi Kimura, Junya Kawamoto, Kohei Maeda, Masayuki Yunoue
-
Patent number: 11319694Abstract: An electric construction machine is provided that can travel from a work location to a charging location, and can suppress deterioration of work efficiency. The electric hydraulic excavator includes: a battery device (19); an electric motor (28) that is driven by power of the battery device (19); a hydraulic pump (29) that is driven by the electric motor (28); a travelling hydraulic motor (7) and a work hydraulic actuator that are driven by a hydraulic fluid delivered from the hydraulic pump (29); a controller (37); and a display device (24).Type: GrantFiled: September 28, 2018Date of Patent: May 3, 2022Assignee: Hitachi Construction Machinery Tierra Co., Ltd.Inventors: Wataru Takagi, Masayuki Yunoue, Takuya Nomura, Yuki Hirose
-
Publication number: 20220049467Abstract: A battery-operated work machine is provided which can perform a work while avoiding such a situation that the work machine cannot reach charging equipment. When the remaining capacity of a battery becomes lower than a first threshold value set in advance, a controller controls an inverter such that the revolution speed of an electric motor is kept at a target revolution speed and controls a first notification device to operate, and besides switches a traveling motor to a travel first speed side, in which the displacement volume is a large volume, irrespective of an input from a traveling mode instruction device, when the remaining capacity of the battery becomes lower than a first threshold value set in advance.Type: ApplicationFiled: March 16, 2020Publication date: February 17, 2022Inventors: Yuki HIROSE, Masayuki YUNOUE, Tatsuo TAKISHITA, Wataru TAKAGI, Takuya NOMURA
-
Patent number: 11136743Abstract: An electric construction machine that can travel from a work site to charging equipment and prevent the lowering of the work efficiency is provided. An electric hydraulic excavator includes a motor (28) that is driven by power of a battery device (19) and drives a hydraulic pump (29), a controller (37), and a display device (24). The controller (37) computes and stores the amount of consumed power of the motor (28) consumed during the period from the departure of the hydraulic excavator from the charging equipment to arrival at the work site, based on movement information of the hydraulic excavator acquired by a movement information acquiring device. The controller (37) subtracts the amount of consumed power from the amount of stored power of the battery device (19) to compute the amount of power consumable at the work site.Type: GrantFiled: September 28, 2018Date of Patent: October 5, 2021Assignee: Hitachi Construction Machinery Tierra Co., LtdInventors: Takuya Nomura, Masayuki Yunoue, Wataru Takagi, Hiromu Yukawa, Yuki Yamamoto
-
Publication number: 20210222399Abstract: An electric construction machine that can travel from a work site to charging equipment and prevent the lowering of the work efficiency is provided. An electric hydraulic excavator includes a motor (28) that is driven by power of a battery device (19) and drives a hydraulic pump (29), a controller (37), and a display device (24). The controller (37) computes and stores the amount of consumed power of the motor (28) consumed during the period from the departure of the hydraulic excavator from the charging equipment to arrival at the work site, based on movement information of the hydraulic excavator acquired by a movement information acquiring device. The controller (37) subtracts the amount of consumed power from the amount of stored power of the battery device (19) to compute the amount of power consumable at the work site.Type: ApplicationFiled: September 28, 2018Publication date: July 22, 2021Inventors: Takuya NOMURA, Masayuki YUNOUE, Wataru TAKAGI, Hiromu YUKAWA, Yuki YAMAMOTO
-
Publication number: 20210222404Abstract: An electric construction machine is provided that can travel from a work location to a charging location, and can suppress deterioration of work efficiency. The electric hydraulic excavator includes: a battery device (19); an electric motor (28) that is driven by power of the battery device (19); a hydraulic pump (29) that is driven by the electric motor (28); a travelling hydraulic motor (7) and a work hydraulic actuator that are driven by a hydraulic fluid delivered from the hydraulic pump (29); a controller (37); and a display device (24).Type: ApplicationFiled: September 28, 2018Publication date: July 22, 2021Inventors: Wataru TAKAGI, Masayuki YUNOUE, Takuya NOMURA, Yuki HIROSE
-
Patent number: 10697150Abstract: A hydraulic drive system for an electrically-driven hydraulic work machine makes it possible to make a rated voltage of various electric equipment such as power storage devices common to one of an electrically-driven hydraulic work machine that is capable of being operated with lower horsepower and to prevent that only a power storage situation of one of the plurality of power storage devices significantly degrades together with operation of the electrically-driven hydraulic work machine and besides, to extend a time period within which each of actuators of the electrically-driven hydraulic work machine can obtain a predetermined speed. Accordingly, a controller 50 includes a virtual limitation torque calculation section 51 and electric motor rotational speed control sections 52 and 53.Type: GrantFiled: March 13, 2018Date of Patent: June 30, 2020Assignee: Hitachi Construction Machinery Tierra Co., Ltd.Inventors: Kiwamu Takahashi, Tatsuo Takishita, Masayuki Yunoue, Kenichirou Nakatani, Taihei Maehara
-
Publication number: 20200048867Abstract: A controller (27) mounted on a small-sized hydraulic excavator (1) includes an engine restart section (27E) that restarts an engine (10) when a horn switch operation determining section (27B) determines that a horn switch (14) is operated and a gate lock lever position determining section (27C) determines that a gate lock lever (16) is at a lock position in a case where a restart standby time determining section (27A) determines that restart standby time (T2) does not yet elapse after the engine (10) is automatically stopped by an idling stop function, and a power supply stopping section (27F) that stops an electric power supply of a vehicle body (2, 3) when the restart standby time determining section (27A) determines that the restart standby time (T2) has elapsed.Type: ApplicationFiled: May 31, 2018Publication date: February 13, 2020Inventors: Hitoshi KIMURA, Junya KAWAMOTO, Kohei MAEDA, Masayuki YUNOUE
-
Patent number: 10465719Abstract: A hydraulic excavator (1) includes a wireless authentication device (52) performing wireless authentication with a portable key device (51) and a vehicle body controller (48) for starting an engine (15) based on authentication by the wireless authentication device (52) and an operation of a start switch (12). The wireless authentication device (52) transmits a request signal within an authenticable range and performs authentication when it receives an ID code for authentication replied from the portable key device (51) based on the transmitted request signal. The vehicle body controller (48) prohibits driving of a hydraulic actuator (5E, 5F, 5G, 5H, 2E, 2F, 3A) when the portable key device (51) is outside of the authenticable range even if a gate lock lever (13) has been switched to an unlock position.Type: GrantFiled: October 30, 2015Date of Patent: November 5, 2019Assignee: Hitachi Construction Machinery Tierra Co., Ltd.Inventors: Takuya Nomura, Tatsuo Takishita, Masayuki Yunoue, Yuta Nakamura, Keisuke Sakisaka
-
Publication number: 20190194910Abstract: A hydraulic drive system for an electrically-driven hydraulic work machine makes it possible to make a rated voltage of various electric equipment such as power storage devices common to one of an electrically-driven hydraulic work machine that is capable of being operated with lower horsepower and to prevent that only a power storage situation of one of the plurality of power storage devices significantly degrades together with operation of the electrically-driven hydraulic work machine and besides, to extend a time period within which each of actuators of the electrically-driven hydraulic work machine can obtain a predetermined speed. Accordingly, a controller 50 includes a virtual limitation torque calculation section 51 and electric motor rotational speed control sections 52 and 53.Type: ApplicationFiled: March 13, 2018Publication date: June 27, 2019Inventors: Kiwamu TAKAHASHI, Tatsuo TAKISHITA, Masayuki YUNOUE, Kenichirou NAKATANI, Taihei MAEHARA
-
Patent number: 10329736Abstract: Provided is a grip heater apparatus for a construction machine that can improve operability by heating the grip portions of left and right operating levers and maintaining a favorable operating environment for the left and right operating levers when work is carried out in a cold region and the operator's hands get cold. The grip heater apparatus includes: left and right grip heaters 31 and 32 provided in grip portions of left and right operation levers 26 and 28, respectively; a battery supplying electric power to the left and right grip heaters; a heater switch 34 for instructing the left and right grip heaters to be turned on or off; and a control device supplying the electric power from the battery to the left and right grip heaters only when the engine is running, the gate lock lever 27 is at a getting-on/off prevention position, and the heater switch instructs the left and right grip heaters to be turned on.Type: GrantFiled: February 23, 2016Date of Patent: June 25, 2019Assignee: Hitachi Construction Machinery Tierra Co., LtdInventors: Takuya Nomura, Tatsuo Takishita, Masayuki Yunoue, Takeyuki Omiya, Wataru Takagi
-
Patent number: 9975522Abstract: A hydraulic excavator (1) includes a wireless authentication device (42) performing wireless authentication with a portable key device (41) and a vehicle body controller (39) allowing or prohibiting start of the engine (15) on the basis of authentication by the wireless authentication device (42) and an operation of a power switch (12). The wireless authentication device (42) transmits a request signal within an authenticable range and performs authentication when it receives an ID code for authentication replied from the portable key device (41) on the basis of the transmitted request signal. The vehicle body controller (39) allows start of the engine (15) by the power switch (12) when a gate lock lever (13) is switched to a lock position and the wireless authentication device (42) performs authentication by the portable key device (41).Type: GrantFiled: October 29, 2015Date of Patent: May 22, 2018Assignee: Hitachi Construction Machinery Tierra Co., Ltd.Inventors: Yuta Nakamura, Tatsuo Takishita, Masayuki Yunoue, Takuya Nomura, Keisuke Sakisaka
-
Patent number: 9889750Abstract: Provided is an electric construction machine adapted to prevent an electric current, after flowing in via a junction at which power transmission systems join together, from flowing into at least one connector to which an external power supply is not connected. Power transmission systems 71A, 71B, 71C connected to connectors 59A, 59B, 59C are all caused to join with a common system 73 at a junction before being connected to a control unit 35. The power transmission systems 71A, 71B, and 71C include switches 74Aa, 74Ab, 74Ba, 74Bb, 74Ca, 74Cb.Type: GrantFiled: June 19, 2013Date of Patent: February 13, 2018Assignee: Hitachi Construction Machinery Tierra Co., Ltd.Inventors: Masayuki Yunoue, Tatsuo Takishita, Hajime Kurikuma
-
Publication number: 20180038077Abstract: Provided is a grip heater apparatus for a construction machine that can improve operability by heating the grip portions of left and right operating levers and maintaining a favorable operating environment for the left and right operating levers when work is carried out in a cold region and the operator's hands get cold. The grip heater apparatus includes: left and right grip heaters 31 and 32 provided in grip portions of left and right operation levers 26 and 28, respectively; a battery supplying electric power to the left and right grip heaters; a heater switch 34 for instructing the left and right grip heaters to be turned on or off; and a control device supplying the electric power from the battery to the left and right grip heaters only when the engine is running, the gate lock lever 27 is at a getting-on/off prevention position, and the heater switch instructs the left and right grip heaters to be turned on.Type: ApplicationFiled: February 23, 2016Publication date: February 8, 2018Inventors: Takuya NOMURA, Tatsuo TAKISHITA, Masayuki YUNOUE, Takeyuki OMIYA, Wataru TAKAGI
-
Publication number: 20170284426Abstract: A hydraulic excavator (1) includes a wireless authentication device (52) performing wireless authentication with a portable key device (51) and a vehicle body controller (48) for starting an engine (15) based on authentication by the wireless authentication device (52) and an operation of a start switch (12). The wireless authentication device (52) transmits a request signal within an authenticable range and performs authentication when it receives an ID code for authentication replied from the portable key device (51) based on the transmitted request signal. The vehicle body controller (48) prohibits driving of a hydraulic actuator (5E, 5F, 5G, 5H, 2E, 2F, 3A) when the portable key device (51) is outside of the authenticable range even if a gate lock lever (13) has been switched to an unlock position.Type: ApplicationFiled: October 30, 2015Publication date: October 5, 2017Inventors: Takuya NOMURA, Tatsuo TAKISHITA, Masayuki YUNOUE, Yuta NAKAMURA, Keisuke SAKISAKA
-
Publication number: 20170282857Abstract: A hydraulic excavator (1) includes a wireless authentication device (42) performing wireless authentication with a portable key device (41) and a vehicle body controller (39) allowing or prohibiting start of the engine (15) on the basis of authentication by the wireless authentication device (42) and an operation of a power switch (12). The wireless authentication device (42) transmits a request signal within an authenticable range and performs authentication when it receives an ID code for authentication replied from the portable key device (41) on the basis of the transmitted request signal. The vehicle body controller (39) allows start of the engine (15) by the power switch (12) when a gate lock lever (13) is switched to a lock position and the wireless authentication device (42) performs authentication by the portable key device (41).Type: ApplicationFiled: October 29, 2015Publication date: October 5, 2017Inventors: Yuta NAKAMURA, Tatsuo TAKISHITA, Masayuki YUNOUE, Takuya NOMURA, Keisuke SAKISAKA
-
Publication number: 20170058489Abstract: A hydraulic excavator (1) includes a wireless authentication starting device (37) for switching conduction or non-conduction between a battery (18) and a starter motor (16) as well as a first electrical component (24) on the basis of an operation of a power switch (12) provided in the vicinity of an operator's seat (9) and authentication of a portable key (38) by wireless communication. The wireless authentication starting device (37) switches an “engine stop/conduction OFF” state to an “engine stop/conduction ON” state when, in the “engine stop/conduction OFF” state, the portable key (38) is within an authenticable range, the gate lock lever (13) is at an unlock position, and the power switch (12) is operated.Type: ApplicationFiled: July 17, 2015Publication date: March 2, 2017Inventors: Takuya NOMURA, Tatsuo TAKISHITA, Masayuki YUNOUE, Wataru TAKAGI, Yoshikatsu SUMIDA
-
Publication number: 20150231974Abstract: Provided is an electric construction machine adapted to prevent an electric current, after flowing in via a junction at which power transmission systems join together, from flowing into at least one connector to which an external power supply is not connected. Power transmission systems 71A, 71B, 71C connected to connectors 59A, 59B, 59C are all caused to join with a common system 73 at a junction before being connected to a control unit 35. The power transmission systems 71A, 71B, and 71C include switches 74Aa, 74Ab, 74Ba, 74Bb, 74Ca, 74Cb.Type: ApplicationFiled: June 19, 2013Publication date: August 20, 2015Inventors: Masayuki Yunoue, Tatsuo Takishita, Hajime Kurikuma
-
Publication number: 20140117934Abstract: An electric construction machine is capable of increasing a battery device charging rate in a short charging time. The battery device includes a plurality of battery systems and an inverter device which has a motor driving control function of selectively connecting one of the battery systems, converting DC power supplied from the connected battery system into AC power, and supplying the AC power to an electric motor. The inverter has a battery charging control function of selectively connecting one of the battery systems and supplying electric power from an external commercial power supply to the connected battery system. When the voltages of the battery systems are less than an upper limit value V1 at the start of the charging, constant-current charging of one battery system is started. Before the one battery system reaches the fully charged state, the connection is switched to another battery system to start constant-current charging thereof.Type: ApplicationFiled: August 7, 2012Publication date: May 1, 2014Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Hajime Kurikuma, Tatsuo Takishita, Masayuki Yunoue