Patents by Inventor Masaho Yamaguchi
Masaho Yamaguchi 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: 20240084546Abstract: An environment-friendly work machine is provided. A work implement includes a boom supported by a vehicular body frame, an arm coupled to the boom, and an attachment coupled to the arm. A boom foot pin rotatably couples the boom to the vehicular body frame. An arm motor is supported by the vehicular body frame. The arm motor generates drive force that moves the arm relatively to the boom. A motive power transmission apparatus mechanically transmits drive force generated by the arm motor to the arm. An arm gear member and a pivot member carry out rotational motion relative to the vehicular body frame as being concentric with the boom foot pin. An arm link transmits motive power to the arm as a result of the relative rotational motion.Type: ApplicationFiled: January 17, 2022Publication date: March 14, 2024Applicant: KOMATSU LTD.Inventor: Masaho YAMAGUCHI
-
Patent number: 8583322Abstract: A mobile crusher includes: a crusher that crushes raw material; a discharge conveyor being disposed on a downstream side of the crusher to discharge the material crushed by the crusher; an engine that serves as a driving source at least for the crusher and the discharge conveyer; a fuel injection quantity controlling unit that controls a speed of the engine; a crusher pressure sensor that determines a change in a load of the crushed material in the crusher; and a pressure sensor that determines presence or absence of the crushed material to be discharged on the discharge conveyor. When the crusher pressure sensor determines that the load on the crusher is reduced and the pressure sensor determines that the crushed material is not present on the discharge conveyor, the fuel injection quantity controlling unit lowers the speed of the engine to a decelerated speed.Type: GrantFiled: May 1, 2009Date of Patent: November 12, 2013Assignee: Komatsu Ltd.Inventors: Masaho Yamaguchi, Yasutaka Nishida, Mitsunobu Yamada, Tooru Nakayama, Ryouichi Togashi
-
Patent number: 8118246Abstract: A mobile crusher includes: a crusher for crushing raw materials; a discharge conveyor provided on a lower stream of the crusher for discharging the raw materials crushed by the crusher; a work implement provided on an upper stream of the crusher for producing the crushed materials; a conveyor sensor and conveyor pressure comparing unit for determining whether the crushed materials to be discharged are fed on the discharge conveyor or not; a crusher pressure sensor and crusher pressure comparing unit for determining whether the raw materials are present in the crusher or not; and a flow rate controller for controlling the speeds of the crusher, discharge conveyor and work implement based on determination results of the conveyor pressure sensor, conveyor pressure comparing unit, crusher pressure sensor and crusher pressure comparing unit.Type: GrantFiled: May 27, 2009Date of Patent: February 21, 2012Assignee: Komatsu Ltd.Inventors: Masaho Yamaguchi, Yasutaka Nishida, Mitsunobu Yamada, Tooru Nakayama, Ryouichi Togashi
-
Patent number: 8042753Abstract: A mobile crusher includes: a crusher having a fixed jaw and a swing jaw and adjusting an outlet gap between lower ends of the fixed jaw and the swing jaw, the crusher crushing raw materials by swing movement of the swing jaw toward the fixed jaw and discharging the raw materials crushed by the crusher from the outlet gap to produce crushed materials; a work implement disposed on an upper stream or a lower stream of the crusher to produce the crushed materials; and a controller that controls a work implement speed of the work implement depending on the outlet gap.Type: GrantFiled: May 12, 2009Date of Patent: October 25, 2011Assignee: Komatsu Ltd.Inventors: Masaho Yamaguchi, Yasutaka Nishida, Mitsunobu Yamada, Tooru Nakayama, Ryouichi Togashi
-
Publication number: 20110077821Abstract: A mobile crusher includes: a crusher that crushes raw material; a discharge conveyor being disposed on a downstream side of the crusher to discharge the material crushed by the crusher; an engine (49) that serves as a driving source at least for the crusher and the discharge conveyer; a fuel injection quantity controlling unit (711) that controls a speed of the engine (49); a crusher pressure sensor (57) that determines a change in a load of the crushed material in the crusher; and a pressure sensor (51) that determines presence or absence of the crushed material to be discharged on the discharge conveyor. When the crusher pressure sensor (57) determines that the load on the crusher is reduced and the pressure sensor (51) determines that the crushed material is not present on the discharge conveyor, the fuel injection quantity controlling unit (711) lowers the speed of the engine (49) to a decelerated speed.Type: ApplicationFiled: May 1, 2009Publication date: March 31, 2011Applicant: KOMATSU LTD.Inventors: Masaho Yamaguchi, Yasutaka Nishida, Mitsunobu Yamada, Tooru Nakayama, Ryouichi Togashi
-
Publication number: 20090302141Abstract: A mobile crusher includes: a crusher having a fixed jaw and a swing jaw and adjusting an outlet gap between lower ends of the fixed jaw and the swing jaw, the crusher crushing raw materials by swing movement of the swing jaw toward the fixed jaw and discharging the raw materials crushed by the crusher from the outlet gap to produce crushed materials; a work implement disposed on an upper stream or a lower stream of the crusher to produce the crushed materials; and a controller that controls a work implement speed of the work implement depending on the outlet gap.Type: ApplicationFiled: May 12, 2009Publication date: December 10, 2009Applicant: KOMATSU LTD.Inventors: Masaho Yamaguchi, Yasutaka Nishida, Mitsunobu Yamada, Tooru Nakayama, Ryouichi Togashi
-
Publication number: 20090294560Abstract: A mobile crusher includes: a crusher for crushing raw materials; a discharge conveyor provided on a lower stream of the crusher for discharging the raw materials crushed by the crusher; a work implement provided on an upper stream of the crusher for producing the crushed materials; a conveyor sensor and conveyor pressure comparing unit for determining whether the crushed materials to be discharged are fed on the discharge conveyor or not; a crusher pressure sensor and crusher pressure comparing unit for determining whether the raw materials are present in the crusher or not; and a flow rate controller for controlling the speeds of the crusher, discharge conveyor and work implement based on determination results of the conveyor pressure sensor, conveyor pressure comparing unit, crusher pressure sensor and crusher pressure comparing unit.Type: ApplicationFiled: May 27, 2009Publication date: December 3, 2009Applicant: KOMATSU LTD.Inventors: Masaho Yamaguchi, Yasutaka Nishida, Mitsunobu Yamada, Tooru Nakayama, Ryouichi Togashi
-
Patent number: 6474577Abstract: The present invention provides a self-propelled crushing machine in which a crushed material having a widely desired grain size can be obtained, a degree of freedom for automatically controlling a rotary tub and a rotary crusher can be preferably improved, and a crushing having a high efficiency can be performed.Type: GrantFiled: August 31, 2001Date of Patent: November 5, 2002Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Masaho Yamaguchi, Satoru Koyanagi
-
Publication number: 20020030130Abstract: The present invention provides a self-propelled crushing machine in which a crushed material having a widely desired grain size can be obtained, a degree of freedom for automatically controlling a rotary tab and a rotary crusher can be preferably improved, and a crushing having a high efficiency can be performed.Type: ApplicationFiled: August 31, 2001Publication date: March 14, 2002Applicant: KOMATSU LTD.,Inventors: Katsuhiro Ikegami, Masaho Yamaguchi, Satoru Koyanagi
-
Patent number: 6332582Abstract: The present invention provides a self-propelled crushing machine in which a crushed material having a widely desired grain size can be obtained, a degree of freedom for automatically controlling a rotary tab and a rotary crusher can be preferably improved, and a crushing having a high efficiency can be performed.Type: GrantFiled: June 25, 1999Date of Patent: December 25, 2001Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Masaho Yamaguchi, Satoru Koyanagi
-
Patent number: 5730373Abstract: There is provided a crusher system drive control apparatus for a traveling type crushing machine including a vehicle body that is equipped with a traveling body and that has mounted thereon a crusher system including a feeder, a crusher and a belt conveyer, which drive control apparatus comprises an abnormal condition detecting means for sensing an abnormal stop of the said belt conveyer, and an operation terminating means in response to a detection signal that is output by the said abnormal condition detecting means for stopping an operation of each of the said feeder and the said crusher.Type: GrantFiled: June 13, 1996Date of Patent: March 24, 1998Assignee: Komatsu Ltd.Inventors: Yukio Tamura, Yasutaka Nishida, Masaho Yamaguchi, Motoki Kurohara, Toru Nakayama
-
Patent number: 5580004Abstract: When objects of crushing are clogged between a bottom plate and a crusher, a locking of the bottom plate that may ensue is automatically released in a self-propelled crushing machine. The machine comprises a feeder hydraulic motor (54) for reciprocating the bottom plate of a hopper and a feeder valve (50) for supplying a first port (54a) and a second port (54b) of the feeder hydraulic motor (54) with a pressurized discharged fluid from a hydraulic pump. The feeder valve (50) takes a first position (B) upon a first solenoid (55) thereof being electrically energized and takes a second position (C) upon a second solenoid (56) thereof being electrically energized. a keep relay (59) electrically energizes the first solenoid (55) and the second solenoid (56) by passing an electric current through each of them, and a first pressure switch (57) and a second pressure switch (58) are turned on when a pressure of the first port (54a) and a pressure of the second port (54b) exceeds a set pressure, respectively.Type: GrantFiled: August 4, 1995Date of Patent: December 3, 1996Assignee: Kabushiki Kaisha Komatsu SeisakushoInventors: Yukio Tamura, Satoru Koyanagi, Yasutaka Nishida, Toru Nakayama, Masaho Yamaguchi