Patents by Inventor Hiroaki Takeshima
Hiroaki Takeshima 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: 20130174682Abstract: A multi-shaft transmission is mounted on a work vehicle for performing loader work, and includes a power transmission mechanism for transmitting power from an input shaft through a countershaft to an output shaft. A shifting part shifts a drivetrain from the input shaft to the output shaft. The power transmission includes a forward clutch and a reverse clutch for forward-reverse shifting, and a plurality of speed stage shifting clutches for changing speed stages, wherein at least one of the forward clutch and the reverse clutch has a plurality of speed region shifting clutches. The shifting part shifts only one clutch among the plurality of speed stage shifting clutches and the plurality of speed region shifting clutches to change speeds when a plurality of speed stages are used in the loader work.Type: ApplicationFiled: April 24, 2012Publication date: July 11, 2013Inventors: Atsushi Sasada, Hiroaki Takeshima, Yoshito Komatsu
-
Patent number: 8483917Abstract: A backhoe loader includes: a transmission; a cab including an operator's seat allowed to be forwardly and backwardly oriented; a loader disposed forwards of the cab; a backhoe disposed rearwards of the cab; a hydraulic pump configured to supply an operating oil to a hydraulic clutch; a hydraulic circuit including a relief valve for setting an intra-circuit hydraulic pressure to be a first hydraulic pressure; a work mode determining unit configured to determine whether or not an operating mode is a backhoe work mode using the backhoe; and a relief valve controlling unit. The relief valve controlling unit is configured to control a relief pressure of the relief valve at a second hydraulic pressure lower than the first hydraulic pressure when the work mode determining unit determines that the operating mode is the backhoe work mode.Type: GrantFiled: April 18, 2012Date of Patent: July 9, 2013Assignee: Komatsu Ltd.Inventors: Hiroaki Takeshima, Yoshito Komatsu
-
Publication number: 20130146412Abstract: A work vehicle has a hydraulic pump and a transmission. The transmission includes a transmission body having a cylindrical input shaft, a torque converter body, a lock-up clutch device, a pump drive shaft, and an oil channel. The lock-up clutch device includes a piston, an oil chamber formed at a back surface of the piston, and a clutch portion. The pump drive shaft penetrates the input shaft and is disposed coaxially to the input shaft. The pump drive shaft transmits driving power to the hydraulic pump. The oil channel is formed between an inner circumference surface of the input shaft and an outer circumference surface of the pump drive shaft, and communicates with the oil chamber in the lock-up clutch device.Type: ApplicationFiled: April 18, 2012Publication date: June 13, 2013Inventors: Hiroaki Takeshima, Yoshito Komatsu
-
Publication number: 20130144496Abstract: A backhoe loader includes: a transmission; a cab including an operator's seat allowed to be forwardly and backwardly oriented; a loader disposed forwards of the cab; a backhoe disposed rearwards of the cab; a hydraulic pump configured to supply an operating oil to a hydraulic clutch; a hydraulic circuit including a relief valve for setting an intra-circuit hydraulic pressure to be a first hydraulic pressure; a work mode determining unit configured to determine whether or not an operating mode is a backhoe work mode using the backhoe; and a relief valve controlling unit. The relief valve controlling unit is configured to control a relief pressure of the relief valve at a second hydraulic pressure lower than the first hydraulic pressure when the work mode determining unit determines that the operating mode is the backhoe work mode.Type: ApplicationFiled: April 18, 2012Publication date: June 6, 2013Inventors: Hiroaki Takeshima, Yoshito Komatsu
-
Publication number: 20130139644Abstract: A backhoe loader includes a multi-axis transmission that includes: an input shaft to which power is inputted; a front output shaft coupled to a front wheel; a rear output shaft disposed in a position higher than that of the front output shaft and coupled to a rear wheel; an intermediate shaft disposed between the input shaft and the front output shaft; a first power transmission mechanism configured to transmit power from the input shaft to the intermediate shaft; and a second power transmission mechanism configured to transmit power from the intermediate shaft to the front output shaft and to transmit power from the front output shaft to the rear output shaft.Type: ApplicationFiled: April 18, 2012Publication date: June 6, 2013Inventors: Hiroaki Takeshima, Yoshito Komatsu
-
Patent number: 8359948Abstract: A transmission for an industrial vehicle has an input shaft, first and second transmission mechanisms, a clutch mechanism, a rotation direction switching gear train, a speed change gear train, and an output shaft. The first and second transmission mechanisms change the speed among a plurality of speeds of rotation from the input shaft. The clutch mechanism is disposed on the input side of the transmission mechanisms and includes forward and reverse clutches and first and second snap clutches for selecting which of the first and second transmission mechanisms will receive rotational input from the engine. The rotation direction switching gear train inputs rotations for forward and reverse travel to the forward and reverse clutches. The speed change gear train inputs to the first snap clutch and the second snap clutch the output from the forward clutch and the reverse clutch.Type: GrantFiled: February 12, 2008Date of Patent: January 29, 2013Assignee: Komatsu Ltd.Inventor: Hiroaki Takeshima
-
Patent number: 8356528Abstract: A transmission for an industrial vehicle has an input shaft; first and second transmission mechanisms each having a plurality of speed-change steps; a second transmission mechanism; a clutch mechanism; a rotation direction switching mechanism; and an output shaft. The clutch mechanism is disposed on the input side of the first and second transmission mechanisms and is provided with a forward clutch and a reverse clutch for switching between forward and reverse travel, and is further provided with first and second snap clutches for selecting which of the first and second transmission mechanisms will receive rotational input from the engine. The rotation direction switching mechanism is a mechanism for switching the direction of rotation inputted to the first transmission mechanism or the second transmission mechanism to the direction of rotation for forward travel or the direction of rotation for reverse travel in accordance with the switching of forward and reverse travel.Type: GrantFiled: February 12, 2008Date of Patent: January 22, 2013Assignee: Komatsu Ltd.Inventors: Masaaki Kuma, Hiroaki Takeshima
-
Patent number: 8147376Abstract: A construction vehicle includes a control unit configured to shift gear after performing pre-shifting to couple a target speed-change gear that corresponds to a target speed with a target speed-change shaft in non-transmitting state of rotation of the input shaft when the gear shift is performed from a current speed to the target speed, in a state in which the current speed gear that corresponds to the current speed step and the current speed-change shaft that corresponds to the current speed gear are coupled. When the vehicle speed detected by the vehicle speed detecting section is zero, the control unit is configured to perform pre-shift auxiliary control prior to the pre-shifting control to input the rotation of the input shaft to the target speed-change shaft in a state in which the target speed-change shaft is not coupled to the plurality of speed-change gears.Type: GrantFiled: January 31, 2008Date of Patent: April 3, 2012Assignee: Komatsu Ltd.Inventors: Hiroaki Takeshima, Masaaki Kuma, Takashi Kuse
-
Publication number: 20100069198Abstract: A construction vehicle includes a control unit configured to shift gear after performing pre-shifting to couple a target speed-change gear that corresponds to a target speed with a target speed-change shaft in non-transmitting state of rotation of the input shaft when the gear shift is performed from a current speed to the target speed, in a state in which the current speed gear that corresponds to the current speed step and the current speed-change shaft that corresponds to the current speed gear are coupled. When the vehicle speed detected by the vehicle speed detecting section is zero, the control unit is configured to perform pre-shift auxiliary control prior to the pre-shifting control to input the rotation of the input shaft to the target speed-change shaft in a state in which the target speed-change shaft is not coupled to the plurality of speed-change gears.Type: ApplicationFiled: January 31, 2008Publication date: March 18, 2010Applicant: KOMATSU LTD.Inventors: Hiroaki Takeshima, Masaaki Kuma, Takashi Kuse
-
Publication number: 20100043596Abstract: A transmission for an industrial vehicle has an input shaft, first and second transmission mechanisms, a clutch mechanism, a rotation direction switching gear train, a speed change gear train, and an output shaft. The first and second transmission mechanisms change the speed among a plurality of speeds of rotation from the input shaft. The clutch mechanism is disposed on the input side of the transmission mechanisms and includes forward and reverse clutches and first and second snap clutches for selecting which of the first and second transmission mechanisms will receive rotational input from the engine. The rotation direction switching gear train inputs rotations for forward and reverse travel to the forward and reverse clutches. The speed change gear train inputs to the first snap clutch and the second snap clutch the output from the forward clutch and the reverse clutch.Type: ApplicationFiled: February 12, 2008Publication date: February 25, 2010Applicant: KOMATSU LTD.Inventor: Hiroaki Takeshima
-
Publication number: 20100018336Abstract: A transmission for an industrial vehicle has an input shaft; first and second transmission mechanisms, each having a plurality of speed-change steps; a second transmission mechanism; a clutch mechanism; a rotation direction switching mechanism; and an output shaft. The clutch mechanism is disposed on the input side of the first and second transmission mechanisms and is provided with a forward clutch and a reverse clutch for switching between forward and reverse travel, and is further provided with first and second snap clutches for selecting which of the first and second transmission mechanisms will receive rotational input from the engine. The rotation direction switching mechanism is a mechanism for switching the direction of rotation inputted to the first transmission mechanism or the second transmission mechanism to the direction of rotation for forward travel or the direction of rotation for reverse travel in accordance with the switching of forward and reverse travel.Type: ApplicationFiled: February 12, 2008Publication date: January 28, 2010Applicant: KOMATSU LTD.Inventors: Masaaki Kuma, Hiroaki Takeshima
-
Patent number: 6556314Abstract: A facsimile provided with a easily detachable scanner disclosed. When a button 7 provided in a panel 6 of a facsimile body F is pushed, lower a right end 10R of a release lever 10 is depressed, and the release lever 10 is turned on a pivot 10C to raise its left end 10L, thereby boosting a bottom 11 of the scanner S. In consequence thereof, the scanner S is ached from the facsimile body F.Type: GrantFiled: June 4, 1999Date of Patent: April 29, 2003Assignee: Sharp Kabushiki KaishaInventors: Kenichi Shiraishi, Hiroshi Kawamoto, Hiroaki Takeshima, Mamoru Fujii, Akihiko Kumagai