Patents by Inventor Hidekazu Niu
Hidekazu Niu 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: 10761531Abstract: The present invention is an induction control system for an autonomous-traveling vehicle that performs traveling and work autonomously while measuring the position of the traveling vehicle by using a satellite positioning system, the induction control system being characterized by, when the autonomous-traveling vehicle is moved backward, setting a virtual antenna position more backward, by a predetermined distance, than the antenna position of the satellite positioning system, and performing a lateral control by using a lateral deviation from a target path at the virtual antenna position. This makes it possible to travel along a pre-designed target path during a forward movement, turning, and a backward movement of the autonomous-traveling vehicle.Type: GrantFiled: November 7, 2017Date of Patent: September 1, 2020Assignee: KPIT TECHNOLOGIES LIMITEDInventors: Keiji Matsumoto, Hidekazu Niu, Prashantkumar Bipinchandra Vora, Rituraj Shrivastava, Manuj Sharma, Soumyo Das
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Patent number: 10519990Abstract: The hydraulic apparatus is set so that the ratio of the pressure-receiving area of the respective bottom oil chambers of the boom cylinder, the arm cylinder and the bucket cylinder to the pressure-receiving area of the respective rod oil chambers matches the ratio of the extruded volume drawn into or discharged from the bottom oil chambers per single rotation by the respective extrusion members of the first hydraulic pump motor, the second hydraulic pump motor and the third hydraulic pump motor to the volume discharged from or drawn into the rod oil chambers.Type: GrantFiled: March 26, 2015Date of Patent: December 31, 2019Assignee: YANMAR CO., LTD.Inventors: Kazuhiro Owada, Keishi Yamanaka, Kensuke Kaneda, Hidekazu Niu
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Publication number: 20180321682Abstract: The present invention is an induction control system for an autonomous-traveling vehicle that performs traveling and work autonomously while measuring the position of the traveling vehicle by using a satellite positioning system, the induction control system being characterized by, when the autonomous-traveling vehicle is moved backward, setting a virtual antenna position more backward, by a predetermined distance, than the antenna position of the satellite positioning system, and performing a lateral control by using a lateral deviation from a target path at the virtual antenna position. This makes it possible to travel along a pre-designed target path during a forward movement, turning, and a backward movement of the autonomous-traveling vehicle.Type: ApplicationFiled: November 7, 2017Publication date: November 8, 2018Inventors: Keiji MATSUMOTO, Hidekazu NIU, Prashantkumar Bipinchandra VORA, Rituraj SHRIVASTAVA, Manuj SHARMA, Soumyo DAS
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Patent number: 10053166Abstract: A traveling vehicle includes: a vehicle body frame, a pair of right and left front crawler traveling devices, a pair of right and left rear crawler traveling devices, a front suspension device that suspends the pair of right and left front crawler traveling devices on the vehicle body frame, and a rear suspension device that suspends the pair of right and left rear crawler traveling devices on the vehicle body frame. The front suspension device integrally suspends the pair of right and left front crawler traveling devices on the vehicle body frame and allows the pair of right and left front crawler traveling devices to be swingable in the vertical direction with respect to the vehicle body frame.Type: GrantFiled: April 22, 2015Date of Patent: August 21, 2018Assignee: YANMAR CO., LTD.Inventors: Kazuma Moriguchi, Hidekazu Niu, Hideaki Aoki
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Publication number: 20170198730Abstract: The hydraulic apparatus is set so that the ratio of the pressure-receiving area of the respective bottom oil chambers of the boom cylinder, the arm cylinder and the bucket cylinder to the pressure-receiving area of the respective rod oil chambers matches the ratio of the extruded volume drawn into or discharged from the bottom oil chambers per single rotation by the respective extrusion members of the first hydraulic pump motor, the second hydraulic pump motor and the third hydraulic pump motor to the volume discharged from or drawn into the rod oil chambers.Type: ApplicationFiled: March 26, 2015Publication date: July 13, 2017Inventors: Kazuhiro OWADA, Keishi YAMANAKA, Kensuke KANEDA, Hidekazu NIU
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Publication number: 20170043818Abstract: A traveling vehicle includes: a vehicle body frame, a pair of right and left front crawler traveling devices, a pair of right and left rear crawler traveling devices, a front suspension device that suspends the pair of right and left front crawler traveling devices on the vehicle body frame, and a rear suspension device that suspends the pair of right and left rear crawler traveling devices on the vehicle body frame. The front suspension device integrally suspends the pair of right and left front crawler traveling devices on the vehicle body frame and allows the pair of right and left front crawler traveling devices to be swingable in the vertical direction with respect to the vehicle body frame.Type: ApplicationFiled: April 22, 2015Publication date: February 16, 2017Applicant: YANMAR CO., LTD.Inventors: Kazuma MORIGUCHI, Hidekazu NIU, Hideaki AOKI
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Patent number: 7305822Abstract: The present invention relates to hydraulic equipment comprising input shaft (2) and output shaft; first and second plungers (8, 10) and first and second spool valves (9, 11) which are moved reciprocally axially; a cylinder block (7) which houses the plungers and spool valves and is rotated integrally with the input shaft; an input side swash plate (6) which touches the first plungers; and an output side swash plate (12) which touches the second plungers and is rotated integrally with the output shaft. The purpose of the present invention is to reduce number of parts concerning to the accuracy of the reciprocal movement of the first and second spool valves. Spool valve guides (37 and 47) on which guide grooves (37b and 47b) slanted against axis of the rotary shaft are formed, and the first or second spool valve is engaged with a holding member (38 or 48) attached to the guide groove or the guide groove.Type: GrantFiled: March 8, 2006Date of Patent: December 11, 2007Assignee: Yanmar Co., Ltd.Inventors: Takeshi Ouchida, Shuji Shiozaki, Hidekazu Niu, Hiroshi Matsuyama
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Patent number: 7117671Abstract: A hydraulic stepless transmission comprises a first hydraulic system. Formed in a cylinder block are first and second plunger holes that contain first and second plungers, respectively, a hydraulic closed circuit that connects the first and second plunger holes, and distributing valve holes that contain distributing valves, which switch flow direction of hydraulic fluid in the circuit. A shaft and cylinder block synchronously rotate, with the first and second plunger holes formed in parallel to the shaft, respectively, and the swash plate of the second hydraulic system is rotatably supported around the shaft. The first and second plungers are urged toward the swash plates by springs provided in the corresponding first and second plunger holes, respectively.Type: GrantFiled: June 17, 2003Date of Patent: October 10, 2006Assignee: Yanmar Co, Ltd.Inventors: Takeshi Oouchida, Shuji Shiozaki, Hiroshi Matsuyama, Hidekazu Niu
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Publication number: 20060174617Abstract: The present invention relates to hydraulic equipment comprising input shaft (2) and output shaft; first and second plungers (8, 10) and first and second spool valves (9, 11) which are moved reciprocally axially; a cylinder block (7) which houses the plungers and spool valves and is rotated integrally with the input shaft; an input side swash plate (6) which touches the first plungers; and an output side swash plate (12) which touches the second plungers and is rotated integrally with the output shaft. The purpose of the present invention is to reduce number of parts concerning to the accuracy of the reciprocal movement of the first and second spool valves. Spool valve guides (37 and 47) on which guide grooves (37b and 47b) slanted against axis of the rotary shaft are formed, and the first or second spool valve is engaged with a holding member (38 or 48) attached to the guide groove or the guide groove.Type: ApplicationFiled: March 8, 2006Publication date: August 10, 2006Inventors: Takeshi Ouchida, Shuji Shiozaki, Hidekazu Niu, Hiroshi Matsuyama
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Publication number: 20060156717Abstract: A hydraulic stepless transmission comprises a first hydraulic system which has first plungers and a swash plate which the first plungers abut on, and a second hydraulic system which has second plungers and a swash plate which the second plungers abut on. In a cylinder block, first and second plunger holes which contain first and second plungers respectively, a hydraulic closed circuit which connects the first and second plunger holes, and distributing valve holes which contain distributing valves which switch a flow direction of hydraulic fluid in the circuit are formed. A shaft, which extends through the cylinder block, and the cylinder block synchronously rotate. The first and second plunger holes are formed in parallel to the shaft respectively. The swash plate of the second hydraulic system is rotatably supported around the shaft. The shaft is supported by a combined thrust and radial bearing and a radial bearing on both sides of the cylinder block, respectively.Type: ApplicationFiled: June 17, 2003Publication date: July 20, 2006Inventors: Takeshi Oouchida, Shuji Shiozaki, Hiroshi Matsuyama, Hidekazu Niu
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Publication number: 20050166588Abstract: A hydraulic stepless transmission comprises a first hydraulic system. Formed in a cylinder block are first and second plunger holes that contain first and second plungers, respectively, a hydraulic closed circuit that connects the first and second plunger holes, and distributing valve holes that contain distributing valves, which switch flow direction of hydraulic fluid in the circuit. A shaft and cylinder block synchronously rotate, with the first and second plunger holes formed in parallel to the shaft, respectively, and the swash plate of the second hydraulic system is rotatably supported around the shaft. The first and second plungers are urged toward the swash plates by springs provided in the corresponding first and second plunger holes, respectively.Type: ApplicationFiled: June 17, 2003Publication date: August 4, 2005Inventors: Takeshi Oouchida, Shuji Shiozaki, Hiroshi Matsuyama, Hidekazu Niu