Patents by Inventor Katsumasa UJI
Katsumasa UJI 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).
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Patent number: 11913198Abstract: A controller mounted in a hydraulic excavator includes: a state transition section that performs switchover between two types of control that are manual control and semiautomatic control, on the basis of input of a state switching signal; and a velocity transition section that changes a rate of change with time in a velocity of a boom cylinder from a first rate of change I1 to a second rate of change I2 greater than the first rate of change I1 in a case in which input to an operation lever changes since the state transition section switches over between the two types of control until the velocity of the boom cylinder changes to a velocity Vo(t) specified by the control after the switchover between the two types of control.Type: GrantFiled: June 10, 2019Date of Patent: February 27, 2024Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Hiroyuki Yamada, Katsumasa Uji
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Patent number: 11866913Abstract: First to third inertial sensors (16, 17, 18) are respectively mounted on a boom (5A), an arm (5B) and a bucket (5C) to rotate in coordinate axes different from each other at the time of operating the boom (5A). In a case where the boom (5A) is operated in a state where a traveling operation pressure Pa and a revolving operation pressure Pb are equal to or less than respective preset operation pressure threshold values, a controller (20) makes a determination on which movable part of the boom (5A), the arm (5B) and the bucket (5C) each of the inertial sensors (16, 17, 18) is mounted, based upon sensor outputs outputted from the inertial sensors (16, 17, 18). The controller (20) sets a corresponding relation between each of the boom (5A), the arm (5B) and the bucket (5C) and each of the inertial sensors (16, 17, 18) based upon the determination result.Type: GrantFiled: July 2, 2019Date of Patent: January 9, 2024Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventor: Katsumasa Uji
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Patent number: 10975551Abstract: There is provided an information controller (60) that calculates a work amount based on the positions of a construction target surface and a current surface in a set coordinate system set in the operational plane of a multi-joint type front work device (30), and a construction distance (L) by which a construction target surface and a current surface of configurations equivalent to those of the construction target surface and the current surface continue on a construction object, and that calculates a predicted requisite time of the work amount of a work based on the work amount and processing speed. A construction completion prediction time calculated by the information controller (60) or a prediction time calculated from the construction completion prediction time is displayed by a display device (67).Type: GrantFiled: February 28, 2017Date of Patent: April 13, 2021Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Katsumasa Uji, Yuichiro Morita, Kouichi Shibata
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Publication number: 20210054600Abstract: First to third inertial sensors (16, 17, 18) are respectively mounted on a boom (5A), an arm (5B) and a bucket (5C) to rotate in coordinate axes different from each other at the time of operating the boom (5A). In a case where the boom (5A) is operated in a state where a traveling operation pressure Pa and a revolving operation pressure Pb are equal to or less than respective preset operation pressure threshold values, a controller (20) makes a determination on which movable part of the boom (5A), the arm (5B) and the bucket (5C) each of the inertial sensors (16, 17, 18) is mounted, based upon sensor outputs outputted from the inertial sensors (16, 17, 18). The controller (20) sets a corresponding relation between each of the boom (5A), the arm (5B) and the bucket (5C) and each of the inertial sensors (16, 17, 18) based upon the determination result.Type: ApplicationFiled: July 2, 2019Publication date: February 25, 2021Applicant: Hitachi Construction Machinery Co., Ltd.Inventor: Katsumasa UJI
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Publication number: 20210047808Abstract: A controller mounted in a hydraulic excavator includes: a state transition section that performs switchover between two types of control that are manual control and semiautomatic control, on the basis of input of a state switching signal; and a velocity transition section that changes a rate of change with time in a velocity of a boom cylinder from a first rate of change I1 to a second rate of change I2 greater than the first rate of change I1 in a case in which input to an operation lever changes since the state transition section switches over between the two types of control until the velocity of the boom cylinder changes to a velocity Vo(t) specified by the control after the switchover between the two types of control.Type: ApplicationFiled: June 10, 2019Publication date: February 18, 2021Inventors: Hiroyuki YAMADA, Katsumasa UJI
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Patent number: 10876274Abstract: To provide an identification system for a work machine which is capable of preventing a setting error, the identification system for a work machine includes: a main control unit to control the entirety of a work machine; and a plurality of power control units to control components of the work machine. The main control unit acquires information about the entire vehicle body of the work machine. Each of the power control units acquires different information about a state of one of the components from that acquired by the other power control units, on the basis of a installation site of the power control unit installed on the work machine. In addition, the power control unit sets a function of the power control unit on the basis of the information about the state and the information about the entire vehicle body.Type: GrantFiled: January 27, 2017Date of Patent: December 29, 2020Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Kouichi Shibata, Yuichiro Morita, Taiki Aizawa, Katsumasa Uji
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Publication number: 20200224386Abstract: To provide an identification system for a work machine which is capable of preventing a setting error, the identification system for a work machine includes: a first control device to control the entirety of a work machine; and a plurality of second control devices to control components of the work machine. The first control device acquires information about the entire vehicle body of the work machine. Each of the second control devices acquires different information about a state of one of the components from that acquired by the other second control devices, on the basis of a installation site of the second control device installed on the work machine. In addition, the second control device sets a function of the second control device on the basis of the information about the state and the information about the entire vehicle body.Type: ApplicationFiled: January 27, 2017Publication date: July 16, 2020Inventors: Kouichi SHIBATA, Yuichiro MORITA, Taiki AIZAWA, Katsumasa UJI
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Patent number: 10207703Abstract: At the time of starting up an engine (9) using an assist motor generator (10), a main controller (28) lowers a lower limit value in a charge/discharge range of an electricity storage device (19) from a first lower limit value (min1) to a second lower limit value (min2) through an energy management control part (28B). The main controller (28) heightens the lower limit value in the charge/discharge range of an electricity storage device (19) from the second lower limit value (min2) to the first lower limit value (min1) when the start of the engine (9) is completed. Further, the main controller (28) displays engine stop prohibition information on a display device (30) when the start of the engine (9) is completed and when an SOC of the electricity storage device (19) falls below the first lower limit value (min1).Type: GrantFiled: December 3, 2015Date of Patent: February 19, 2019Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Katsumasa Uji, Yuichiro Morita, Kouichi Shibata
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Publication number: 20190017249Abstract: There is provided an information controller (60) that calculates a work amount based on the positions of a construction target surface and a current surface in a set coordinate system set in the operational plane of a multi-joint type front work device (30), and a construction distance (L) by which a construction target surface and a current surface of configurations equivalent to those of the construction target surface and the current surface continue on a construction object, and that calculates a predicted requisite time of the work amount of a work based on the work amount and processing speed. A construction completion prediction time calculated by the information controller (60) or a prediction time calculated from the construction completion prediction time is displayed by a display device (67).Type: ApplicationFiled: February 28, 2017Publication date: January 17, 2019Inventors: Katsumasa UJI, Yuichiro MORITA, Kouichi SHIBATA
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Patent number: 9988791Abstract: A management server (32) is provided in a position away from a hydraulic excavator (1). An operator ID and a vehicle body ID and output characteristic information are stored in a memory device (32A) in the management server (32) in such a manner as to be associated with operability desired by each of operators. The management server (32) extracts the output characteristic information in conformity with the operability desired by an operator from the operator ID and the vehicle body ID, and outputs the extracted output characteristic information to the hydraulic excavator (1). A control device (17) in the hydraulic excavator (1) changes the output characteristics of hydraulic actuators (4D), (4E), (4F), (2B), (3B) based upon the output characteristic information stored in a memory (19).Type: GrantFiled: March 31, 2016Date of Patent: June 5, 2018Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Katsumasa Uji, Yuuichirou Morita, Kouichi Shibata
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Publication number: 20180106016Abstract: A management server (32) is provided in a position away from a hydraulic excavator (1). An operator ID and a vehicle body ID and output characteristic information are stored in a memory device (32A) in the management server (32) in such a manner as to be associated with operability desired by each of operators. The management server (32) extracts the output characteristic information in conformity with the operability desired by an operator from the operator ID and the vehicle body ID, and outputs the extracted output characteristic information to the hydraulic excavator (1). A control device (17) in the hydraulic excavator (1) changes the output characteristics of hydraulic actuators (4D), (4E), (4F), (2B), (3B) based upon the output characteristic information stored in a memory (19).Type: ApplicationFiled: March 31, 2016Publication date: April 19, 2018Inventors: Katsumasa UJI, Yuuichirou MORITA, Kouichi SHIBATA
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Publication number: 20170282907Abstract: At the time of starting up an engine (9) using an assist motor generator (10), a main controller (28) lowers a lower limit value in a charge/discharge range of an electricity storage device (19) from a first lower limit value (min1) to a second lower limit value (min2) through an energy management control part (28B). The main controller (28) heightens the lower limit value in the charge/discharge range of an electricity storage device (19) from the second lower limit value (min2) to the first lower limit value (min1) when the start of the engine (9) is completed. Further, the main controller (28) displays engine stop prohibition information on a display device (30) when the start of the engine (9) is completed and when an SOC of the electricity storage device (19) falls below the first lower limit value (min1).Type: ApplicationFiled: December 3, 2015Publication date: October 5, 2017Inventors: Katsumasa UJI, Yuichiro MORITA, Kouichi SHIBATA