Patents by Inventor Chie Yabuki
Chie Yabuki 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: 9328789Abstract: A vibration damping device for railway vehicle includes an actuator and a damper circuit that causes the actuator to function as a damper. The actuator includes a cylinder coupled to a truck of a railway vehicle, a piston, a rod coupled to the piston and a body, a rod-side chamber and a piston-side chamber inside the cylinder, a first on-off valve for a first passage that communicates between a rod-side chamber and a piston-side chamber, a second on-off valve for a second passage that communicates between the piston-side chamber and a tank, and a pump that supplies a hydraulic fluid into the rod-side chamber. The hydraulic fluid has such kinematic viscosity-temperature characteristics that a kinematic viscosity of the hydraulic fluid ranges from 7 mm2/s to 50 mm2/s in a temperature range of from 20° C. to 60° C.Type: GrantFiled: August 6, 2012Date of Patent: May 3, 2016Assignee: KYB CorporationInventors: Takayuki Ogawa, Jun Aoki, Tsutomu Suzuki, Masaru Uchida, Chie Yabuki
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Patent number: 9233695Abstract: A railcar damping device includes: a tank storing a liquid; a first opening/closing valve provided in a first passage connecting a rod side chamber and a piston side chamber, which are defined by a piston, to be capable of opening and closing the first passage; a second opening/closing valve provided in a second passage connecting the piston side chamber and the tank to be capable of opening and closing the second passage; a pump that is driven to rotate at a predetermined normal rotation speed in order to supply the liquid from the tank to the rod side chamber; and a temperature determination unit that determines a temperature of the liquid supplied to the actuator, wherein a rotation speed of the pump is reduced below a normal rotation speed when the temperature determination unit determines that the temperature of the liquid is lower than a predetermined temperature.Type: GrantFiled: June 19, 2012Date of Patent: January 12, 2016Assignee: KAYABA INDUSTRY CO., LTD.Inventors: Takayuki Ogawa, Jun Aoki, Masaru Uchida, Chie Yabuki
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Patent number: 8997950Abstract: A vibration control device for railroad vehicle includes an actuator with a cylinder coupled to a truck of a railroad vehicle, a piston, a rod coupled to the piston and a vehicle body, a rod-side chamber and a piston-side chamber in the cylinder, a tank, a first on-off valve disposed at an intermediate position of a first passage communicating between the rod-side chamber and the piston-side chamber, a second on-off valve disposed at an intermediate position of a second passage communicating between the piston-side chamber and the tank, and a pump for supplying fluid to the rod-side chamber. A warm-up operation of the actuator is performed by opening the first and second on-off valves and driving the pump after the vibration control device is started and before a transition is made to a normal control mode for suppressing the vibration of the vehicle body.Type: GrantFiled: May 30, 2012Date of Patent: April 7, 2015Assignee: Kayaba Industry Co., Ltd.Inventors: Takayuki Ogawa, Jun Aoki, Masaru Uchida, Chie Yabuki
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Publication number: 20140196628Abstract: A railcar damping device includes: a tank storing a liquid; a first opening/closing valve provided in a first passage connecting a rod side chamber and a piston side chamber, which are defined by a piston, to be capable of opening and closing the first passage; a second opening/closing valve provided in a second passage connecting the piston side chamber and the tank to be capable of opening and closing the second passage; a pump that is driven to rotate at a predetermined normal rotation speed in order to supply the liquid from the tank to the rod side chamber; and a temperature determination unit that determines a temperature of the liquid supplied to the actuator, wherein a rotation speed of the pump is reduced below a normal rotation speed when the temperature determination unit determines that the temperature of the liquid is lower than a predetermined temperature.Type: ApplicationFiled: June 19, 2012Publication date: July 17, 2014Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Takayuki Ogawa, Jun Aoki, Masaru Uchida, Chie Yabuki
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Publication number: 20140083807Abstract: A vibration damping device for railway vehicle includes an actuator and a damper circuit that causes the actuator to function as a damper. The actuator includes a cylinder coupled to a truck of a railway vehicle, a piston, a rod coupled to the piston and a body, a rod-side chamber and a piston-side chamber inside the cylinder, a first on-off valve for a first passage that communicates between a rod-side chamber and a piston-side chamber, a second on-off valve for a second passage that communicates between the piston-side chamber and a tank, and a pump that supplies a hydraulic fluid into the rod-side chamber. The hydraulic fluid has such kinematic viscosity-temperature characteristics that a kinematic viscosity of the hydraulic fluid ranges from 7 mm2/s to 50 mm2/s in a temperature range of from 20° C. to 60° C.Type: ApplicationFiled: August 6, 2012Publication date: March 27, 2014Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Takayuki Ogawa, Jun Aoki, Tsutomu Suzuki, Masaru Uchida, Chie Yabuki
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Publication number: 20130248306Abstract: A vibration control device for railroad vehicle includes an actuator with a cylinder coupled to a truck of a railroad vehicle, a piston, a rod coupled to the piston and a vehicle body, a rod-side chamber and a piston-side chamber in the cylinder, a tank, a first on-off valve disposed at an intermediate position of a first passage communicating between the rod-side chamber and the piston-side chamber, a second on-off valve disposed at an intermediate position of a second passage communicating between the piston-side chamber and the tank, and a pump for supplying fluid to the rod-side chamber. A warm-up operation of the actuator is performed by opening the first and second on-off valves and driving the pump after the vibration control device is started and before a transition is made to a normal control mode for suppressing the vibration of the vehicle body.Type: ApplicationFiled: May 30, 2012Publication date: September 26, 2013Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Takayuki Ogawa, Jun Aoki, Masaru Uchida, Chie Yabuki