Patents by Inventor Norihiko Kurita
Norihiko Kurita 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: 20190048966Abstract: A shock absorber according to the present invention includes a shock absorber main body in which an internal air pressure is set to a pressure exceeding an atmospheric pressure, a relief valve configured to open when the air pressure in an air chamber of the shock absorber main body reaches a valve opening pressure, and a lock device capable of maintaining the relief valve in a closed state, and the air pressure in the shock absorber main body can be adjusted to the valve opening pressure of the relief valve.Type: ApplicationFiled: August 6, 2018Publication date: February 14, 2019Applicant: KYB CORPORATIONInventor: Norihiko Kurita
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Patent number: 10138977Abstract: A controller of a shock absorber has a differential path configured to perform derivative compensation on the basis of a difference between a target pressure and a detected pressure or on the basis of the detected pressure, multiply the compensated value by a negative gain, and output a resulting value of the multiplication, and obtains an electric current instruction applied to a pressure control solenoid valve.Type: GrantFiled: October 5, 2015Date of Patent: November 27, 2018Assignee: KYB CorporationInventor: Norihiko Kurita
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Patent number: 10124644Abstract: A damper control device includes a rate sensor that detects a pitching angular velocity of a vehicle body, a vehicle speed sensor, a steering angle sensor and a calculation unit that detect a roll angle and a yaw angular velocity of the vehicle body, a pressure sensor that detects a pressure of a contraction-side chamber in a front-wheel side damper, a pressure sensor that detects a pressure of a contraction-side chamber in a rear-wheel side damper, and a correction unit that corrects the pitching angular velocity. The pressures are controlled on the basis of the corrected pitching angular velocity and the pressures. The vehicle speed sensor, the steering angle sensor and the calculation unit detect the roll angle and the yaw angular velocity on the basis of a traveling speed and a steering angle.Type: GrantFiled: April 23, 2015Date of Patent: November 13, 2018Assignee: KYB CorporationInventor: Norihiko Kurita
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Patent number: 10035398Abstract: A damper control device feeds back a pressure within an extension-side chamber to control an extension-side solenoid valve that adjusts the pressure within the extension-side chamber, and feeds back a pressure within a compression-side chamber to control a compression-side solenoid valve that adjusts the pressure within the compression-side chamber. The damper control device performs a compression-side reduction correction which reduces a compression-side current supplied to the compression-side solenoid valve during extension of a damper, and performs an extension-side reduction correction which reduces an extension-side current supplied to the extension-side solenoid valve during contraction of the damper.Type: GrantFiled: July 22, 2015Date of Patent: July 31, 2018Assignee: KYB CorporationInventor: Norihiko Kurita
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Publication number: 20170356522Abstract: A controller of a shock absorber has a differential path configured to perform derivative compensation on the basis of a difference between a target pressure and a detected pressure or on the basis of the detected pressure, multiply the compensated value by a negative gain, and output a resulting value of the multiplication, and obtains an electric current instruction applied to a pressure control solenoid valve.Type: ApplicationFiled: October 5, 2015Publication date: December 14, 2017Applicant: KYB CorporationInventor: Norihiko KURITA
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Patent number: 9751373Abstract: The damper control device includes a three axis rate sensor that detects a pitching angular velocity of a vehicle body of a two-wheeled vehicle, a pressure sensor that detects a pressure of a contraction-side chamber in a front-wheel side damper, a pressure sensor that detects a pressure of a contraction-side chamber of a rear-wheel side damper, and a correction unit that corrects the pitching angular velocity. The damper control device controls the pressure of the contraction-side chamber in the front-wheel side damper and the pressure of the contraction-side chamber of the rear-wheel side damper on the basis of the corrected pitching angular velocity, the pressure of the contraction-side chamber in the front-wheel side damper and the pressure of the contraction-side chamber of the rear-wheel side damper.Type: GrantFiled: April 23, 2015Date of Patent: September 5, 2017Assignee: KYB CorporationInventor: Norihiko Kurita
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Publication number: 20170240242Abstract: A suspension apparatus includes a pair of dampers configured to extend/contract to exert a damping force, each of the dampers includes a cylinder, a piston slidably inserted into the cylinder and configured to partition the inside of the cylinder into an extension-side chamber and a contraction-side chamber, and a piston rod connected to the piston and movably inserted into the cylinder, and an inner diameter of the cylinder of one of the dampers is different from an inner diameter of the cylinder of the other.Type: ApplicationFiled: September 17, 2015Publication date: August 24, 2017Applicant: KYB CorporationInventor: Norihiko KURITA
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Publication number: 20170225536Abstract: A suspension device includes a damper having an extension-side chamber and a contraction-side chamber, an air spring that exerts a resilient force in a direction in which the damper is extended, and a control part that independently adjusts the pressures of the extension-side chamber and the contraction-side chamber to control a force exerted by the damper. The control part makes the damper exert a balancing force against the resilient force of the air spring in a predetermined stroke range of the air spring.Type: ApplicationFiled: August 7, 2015Publication date: August 10, 2017Applicant: KYB CorporationInventor: Norihiko KURITA
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Patent number: 9683625Abstract: A shock absorber includes a piston joined to a piston rod that proceeds into and recedes from a cylinder, an extension-side chamber and a compression-side chamber that are separated from each other by the piston and have a working fluid reserved therein, first and second extension-side discharge passages in which the working fluid discharged from the extension-side chamber flows, an extension-side supply passage in which the working fluid to be supplied to the compression-side chamber flows, first and second compression-side discharge passages in which the working fluid discharged from the compression-side chamber flows, and a compression-side supply passage in which the working fluid to be supplied to the extension-side chamber flows. An extension-side damping valve and a compression-side damping valve are respectively provided in the first extension-side discharge passage and the first compression-side discharge passage.Type: GrantFiled: September 3, 2014Date of Patent: June 20, 2017Assignee: KYB CorporationInventor: Norihiko Kurita
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Publication number: 20170096040Abstract: A damper control device includes a rate sensor that detects a pitching angular velocity of a vehicle body, a vehicle speed sensor, a steering angle sensor and a calculation unit that detect a roll angle and a yaw angular velocity of the vehicle body, a pressure sensor that detects a pressure of a contraction-side chamber in a front-wheel side damper, a pressure sensor that detects a pressure of a contraction-side chamber in a rear-wheel side damper, and a correction unit that corrects the pitching angular velocity. The pressures are controlled on the basis of the corrected pitching angular velocity and the pressures. The vehicle speed sensor, the steering angle sensor and the calculation unit detect the roll angle and the yaw angular velocity on the basis of a traveling speed and a steering angle.Type: ApplicationFiled: April 23, 2015Publication date: April 6, 2017Applicant: KYB CorporationInventor: Norihiko KURITA
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Publication number: 20170080769Abstract: The damper control device includes a three axis rate sensor that detects a pitching angular velocity of a vehicle body of a two-wheeled vehicle, a pressure sensor that detects a pressure of a contraction-side chamber in a front-wheel side damper, a pressure sensor that detects a pressure of a contraction-side chamber of a rear-wheel side damper, and a correction unit that corrects the pitching angular velocity. The damper control device controls the pressure of the contraction-side chamber in the front-wheel side damper and the pressure of the contraction-side chamber of the rear-wheel side damper on the basis of the corrected pitching angular velocity, the pressure of the contraction-side chamber in the front-wheel side damper and the pressure of the contraction-side chamber of the rear-wheel side damper.Type: ApplicationFiled: April 23, 2015Publication date: March 23, 2017Applicant: KYB CorporationInventor: Norihiko KURITA
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Publication number: 20170072762Abstract: A damper control device feeds back a pressure within an extension-side chamber to control an extension-side solenoid valve that adjusts the pressure within the extension-side chamber, and feeds back a pressure within a compression-side chamber to control a compression-side solenoid valve that adjusts the pressure within the compression-side chamber. The damper control device performs a compression-side reduction correction which reduces a compression-side current supplied to the compression-side solenoid valve during extension of a damper, and performs an extension-side reduction correction which reduces an extension-side current supplied to the extension-side solenoid valve during contraction of the damper.Type: ApplicationFiled: July 22, 2015Publication date: March 16, 2017Applicant: KYB CorporationInventor: Norihiko KURITA
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Publication number: 20170015384Abstract: A front fork includes a pair of telescopic tube members and an upper bracket on an upper side and an under bracket on a lower side. The upper bracket and the under bracket couple vehicle body side tubes of the pair of tube members and couple the vehicle body side tubes to a vehicle body side. The upper bracket includes a pair of cap portions into which upper side opening portions of the vehicle body side tubes are inwardly inserted. The cap portions cover upper side openings of the tube members.Type: ApplicationFiled: March 9, 2015Publication date: January 19, 2017Applicant: KYB CorporationInventor: Norihiko KURITA
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Patent number: 9446649Abstract: A damper control device includes a pitching angular velocity detection unit that detects a pitching angular velocity of a vehicle body, a front wheel side pressure detection unit that detects a pressure of a compression side chamber in a front wheel side damper, and a rear wheel side pressure detection unit that detects a pressure of a compression side chamber in a rear wheel side damper. The damper control device controls the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper based on the pitching angular velocity, the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper.Type: GrantFiled: September 27, 2013Date of Patent: September 20, 2016Assignee: KYB CORPORATIONInventor: Norihiko Kurita
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Publication number: 20160215849Abstract: A shock absorber includes a piston joined to a piston rod that proceeds into and recedes from a cylinder, an extension-side chamber and a compression-side chamber that are separated from each other by the piston and have a working fluid reserved therein, first and second extension-side discharge passages in which the working fluid discharged from the extension-side chamber flows, an extension-side supply passage in which the working fluid to be supplied to the compression-side chamber flows, first and second compression-side discharge passages in which the working fluid discharged from the compression-side chamber flows, and a compression-side supply passage in which the working fluid to be supplied to the extension-side chamber flows. An extension-side damping valve and a compression-side damping valve are respectively provided in the first extension-side discharge passage and the first compression-side discharge passage.Type: ApplicationFiled: September 3, 2014Publication date: July 28, 2016Applicant: KYB CorporationInventor: Norihiko KURITA
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Publication number: 20150239317Abstract: A damper control device includes a pitching angular velocity detection unit that detects a pitching angular velocity of a vehicle body, a front wheel side pressure detection unit that detects a pressure of a compression side chamber in a front wheel side damper, and a rear wheel side pressure detection unit that detects a pressure of a compression side chamber in a rear wheel side damper. The damper control device controls the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper based on the pitching angular velocity, the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper.Type: ApplicationFiled: September 27, 2013Publication date: August 27, 2015Applicant: KAYABA INDUSTRY CO., LTD.Inventor: Norihiko Kurita