Patents by Inventor Ryuki NISHIMOTO
Ryuki NISHIMOTO 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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Publication number: 20240052597Abstract: A hydraulic system for a working machine includes first and second hydraulic actuators actuated by hydraulic fluid delivered by a hydraulic pump, a first flow rate controller to control a first supply flow rate of hydraulic fluid supplied to the first hydraulic actuator to match a first required flow rate, a second flow rate controller to control a second supply flow rate of hydraulic fluid supplied to the second hydraulic actuator to match a second required flow rate, and a special flow rate control system to, if a sum of the first and second required flow rates is greater than a maximum delivery flow rate of the hydraulic pump, reduce the first supply flow rate to allow the second supply flow rate to approach the second required flow rate.Type: ApplicationFiled: August 9, 2023Publication date: February 15, 2024Inventors: Kohei NAGAO, Yuji FUKUDA, Ryuki NISHIMOTO
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Patent number: 11505922Abstract: The working machine includes a traveling device, a traveling motor, a hydraulic pump including a swashplate, a prime mover to drive the hydraulic pump, a first servo-cylinder to set an angle of the swashplate, a charge pump to supply pilot fluid to the first servo-cylinder, a switching valve shiftable between a traveling position to supply the pilot fluid from the charge pump to the first servo-cylinder and a neutral position to stop the pilot fluid supply to the first servo-cylinder, a switching operation member operable to select either a traveling mode or a neutral mode, and a controller to shift the switching valve between the traveling position and the neutral position. The controller holds the switching valve at the neutral position after the switching operation member is operated to select the traveling mode until a rotation speed of the prime mover becomes not less than a first predetermined rotation speed.Type: GrantFiled: September 28, 2021Date of Patent: November 22, 2022Assignee: KUBOTA CORPORATIONInventors: Ryuki Nishimoto, Teruhiko Iwamoto, Tsutomu Aizawa, Makoto Noguchi
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Patent number: 11414835Abstract: A working machine includes a hydraulic device, an operation valve to supply operation fluid to operate the hydraulic device and to vary the operation fluid to be supplied to the hydraulic device, an operation device having an operation member supported swingably, the operation device being configured to output an operation signal in accordance with an operation amount of the operation member, and a controller including a swing calculator to calculate an evaluation value representing a degree of swinging of the operation member, and a control signal generator to generate a control signal based on the evaluation value and the operation signal.Type: GrantFiled: October 21, 2020Date of Patent: August 16, 2022Assignee: KUBOTA CORPORATIONInventors: Masahiro Toyama, Ryuki Nishimoto, Yuji Fukuda, Kohei Nagao, Ryota Hamamoto, Hiroaki Nakagawa
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Patent number: 11306746Abstract: A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.Type: GrantFiled: August 7, 2020Date of Patent: April 19, 2022Assignee: KUBOTA CORPORATIONInventors: Yuji Fukuda, Keigo Honda, Ryosuke Kinugawa, Ryuki Nishimoto, Yuji Yamashita, Daisuke Sakurai
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Publication number: 20220018094Abstract: The working machine includes a traveling device, a traveling motor, a hydraulic pump including a swashplate, a prime mover to drive the hydraulic pump, a first servo-cylinder to set an angle of the swashplate, a charge pump to supply pilot fluid to the first servo-cylinder, a switching valve shiftable between a traveling position to supply the pilot fluid from the charge pump to the first servo-cylinder and a neutral position to stop the pilot fluid supply to the first servo-cylinder, a switching operation member operable to select either a traveling mode or a neutral mode, and a controller to shift the switching valve between the traveling position and the neutral position. The controller holds the switching valve at the neutral position after the switching operation member is operated to select the traveling mode until a rotation speed of the prime mover becomes not less than a first predetermined rotation speed.Type: ApplicationFiled: September 28, 2021Publication date: January 20, 2022Applicant: KUBOTA CORPORATIONInventors: Ryuki NISHIMOTO, Teruhiko IWAMOTO, Tsutomu AIZAWA, Makoto NOGUCHI
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Patent number: 11118609Abstract: A hydraulic system includes a control device to reduce a first movement speed to be lower than a second movement speed, the first movement speed being a speed at which a spool of a first control valve moves from a first supply position to a first stop position under a state where a second control valve is in the second supply position, the second movement speed being a speed at which the spool moves from the first supply position to the first stop position under a state where the second control valve is in the second stop position. The first supply position allows operation fluid to be supplied to a hydraulic actuator. The first stop position prevents the operation fluid from being supplied to the hydraulic actuator. The second stop position prevents the operation fluid from being supplied to a first fluid tube coupling a hydraulic pump to the hydraulic actuator.Type: GrantFiled: June 5, 2019Date of Patent: September 14, 2021Assignee: KUBOTA CORPORATIONInventors: Ryuki Nishimoto, Yuji Fukuda, Jun Tomita
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Patent number: 11035267Abstract: A working machine includes a manual switch, a filter to catch particulate matters included in exhaust gas that is exhausted from a prime mover, a first cleaning controller to perform automatic cleaning that automatically combusts the particulate matters when a deposits amount of the particulate matters caught by the filter is a first deposits amount threshold or more, a second cleaning controller to perform manual cleaning that combusts the particulate matters based on a command of the manual switch when the deposits amount is equal to or more than a second deposits amount threshold that is larger than the first deposits amount threshold, and a third cleaning controller to perform assist cleaning that combusts the particulate matters based on the command of the manual switch when the deposits amount is equal to or more than the first deposits amount threshold and smaller than the second deposits amount threshold.Type: GrantFiled: October 23, 2019Date of Patent: June 15, 2021Assignee: KUBOTA CORPORATIONInventors: Ryuki Nishimoto, Keisuke Miura, Ryosuke Kinugawa
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Publication number: 20210123212Abstract: A working machine includes a hydraulic device, an operation valve to supply operation fluid to operate the hydraulic device and to vary the operation fluid to be supplied to the hydraulic device, an operation device having an operation member supported swingably, the operation device being configured to output an operation signal in accordance with an operation amount of the operation member, and a controller including a swing calculator to calculate an evaluation value representing a degree of swinging of the operation member, and a control signal generator to generate a control signal based on the evaluation value and the operation signal.Type: ApplicationFiled: October 21, 2020Publication date: April 29, 2021Applicant: KUBOTA CORPORATIONInventors: Masahiro TOYAMA, Ryuki NISHIMOTO, Yuji FUKUDA, Kohei NAGAO, Ryota HAMAMOTO, Hiroaki NAKAGAWA
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Publication number: 20200362884Abstract: A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.Type: ApplicationFiled: August 7, 2020Publication date: November 19, 2020Applicant: KUBOTA CORPORATIONInventors: Yuji FUKUDA, Keigo HONDA, Ryosuke KINUGAWA, Ryuki NISHIMOTO, Yuji YAMASHITA, Daisuke SAKURAI
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Patent number: 10774852Abstract: A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.Type: GrantFiled: December 26, 2017Date of Patent: September 15, 2020Assignee: KUBOTA CORPORATIONInventors: Yuji Fukuda, Keigo Honda, Ryosuke Kinugawa, Ryuki Nishimoto, Yuji Yamashita, Daisuke Sakurai
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Publication number: 20200056520Abstract: A working machine includes a manual switch, a filter to catch particulate matters included in exhaust gas that is exhausted from a prime mover, a first cleaning controller to perform automatic cleaning that automatically combusts the particulate matters when a deposits amount of the particulate matters caught by the filter is a first deposits amount threshold or more, a second cleaning controller to perform manual cleaning that combusts the particulate matters based on a command of the manual switch when the deposits amount is equal to or more than a second deposits amount threshold that is larger than the first deposits amount threshold, and a third cleaning controller to perform assist cleaning that combusts the particulate matters based on the command of the manual switch when the deposits amount is equal to or more than the first deposits amount threshold and smaller than the second deposits amount threshold.Type: ApplicationFiled: October 23, 2019Publication date: February 20, 2020Applicant: KUBOTA CORPORATIONInventors: Ryuki NISHIMOTO, Keisuke MIURA, Ryosuke KINUGAWA
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Publication number: 20200048868Abstract: A hydraulic system includes a control device to reduce a first movement speed to be lower than a second movement speed, the first movement speed being a speed at which a spool of a first control valve moves from a first supply position to a first stop position under a state where a second control valve is in the second supply position, the second movement speed being a speed at which the spool moves from the first supply position to the first stop position under a state where the second control valve is in the second stop position. The first supply position allows operation fluid to be supplied to a hydraulic actuator. The first stop position prevents the operation fluid from being supplied to the hydraulic actuator. The second stop position prevents the operation fluid from being supplied to a first fluid tube coupling a hydraulic pump to the hydraulic actuator.Type: ApplicationFiled: June 5, 2019Publication date: February 13, 2020Applicant: KUBOTA CORPORATIONInventors: Ryuki NISHIMOTO, Yuji FUKUDA, Jun TOMITA
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Publication number: 20180180068Abstract: A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.Type: ApplicationFiled: December 26, 2017Publication date: June 28, 2018Applicant: KUBOTA CORPORATIONInventors: Yuji FUKUDA, Keigo HONDA, Ryosuke KINUGAWA, Ryuki NISHIMOTO, Yuji YAMASHITA, Daisuke SAKURAI