Patents by Inventor Takayuki Tachi
Takayuki Tachi 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: 10449820Abstract: A vehicle-height control system includes: a fluid supply and discharge device including a compressor device and a tank storing fluid pressurized by the compressor device; a vehicle-height control actuator corresponding to a wheel and connected to the fluid supply and discharge device; a vehicle height controller that controls a vehicle height for the wheel by controlling the fluid supply and discharge device to control supply and discharge of fluid to and from the vehicle-height control actuator; a tank pressure controller that controls a tank pressure; and a fluid supply controller that supplies the fluid to a low pressure portion by controlling the fluid supply and discharge device at start and/or termination of at least one of control executed by the vehicle height controller and control executed by the tank pressure controller. The low pressure portion is at least a portion of the fluid supply and discharge device.Type: GrantFiled: February 17, 2017Date of Patent: October 22, 2019Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Ikuhide Iyoda, Takayuki Tachi, Hideki Ohashi, Katsuyuki Sano, Jun Tokumitsu, Ryo Kanda, Shogo Tanaka, Masao Ikeya, Masaaki Oishi
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Publication number: 20170274720Abstract: A vehicle-height control system includes: a fluid supply and discharge device including a compressor device and a tank storing fluid pressurized by the compressor device; a vehicle-height control actuator corresponding to a wheel and connected to the fluid supply and discharge device; a vehicle height controller that controls a vehicle height for the wheel by controlling the fluid supply and discharge device to control supply and discharge of fluid to and from the vehicle-height control actuator; a tank pressure controller that controls a tank pressure; and a fluid supply controller that supplies the fluid to a low pressure portion by controlling the fluid supply and discharge device at start and/or termination of at least one of control executed by the vehicle height controller and control executed by the tank pressure controller. The low pressure portion is at least a portion of the fluid supply and discharge device.Type: ApplicationFiled: February 17, 2017Publication date: September 28, 2017Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Ikuhide IYODA, Takayuki TACHI, Hideki OHASHI, Katsuyuki SANO, Jun TOKUMITSU, Ryo KANDA, Shogo TANAKA, Masao IKEYA, Masaaki OISHI
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Patent number: 8641052Abstract: A suspension device (S) as a solution for the problem of the present invention includes: an active suspension unit (U) equipped with a linear actuator (A) and a first fluid pressure damper (D1) connected to the actuator (A) to extend and retract in the same direction; and a second fluid pressure damper (D2) arranged in parallel with the active suspension unit (U).Type: GrantFiled: October 27, 2009Date of Patent: February 4, 2014Assignees: Kayaba Industry Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Takuhiro Kondo, Yoshifumi Kobayashi, Motohiko Honma, Takayuki Tachi
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Patent number: 8499903Abstract: In a suspension device (S) comprising a motion transforming mechanism (T) for transforming a linear motion of a linear motion member (1) into a rotational motion of a rotating member (2) and a motor (M) connected to the rotating member (2) in the motion transforming mechanism (T), an air spring (AS) is provided, the air spring (AS) including a tubular air chamber (22) connected to the motor (M), an air piston (37) connected to the linear motion member (1) and being tubular and smaller in diameter than the air chamber (22), and a diaphragm (27) interposed between the air chamber (22) and the air piston (37), a stopper (38a) is provided on an outer periphery of the air piston (37), and a stopper seat (46) is provided on an inner periphery of the air chamber (22) so as to be put in abutment against the stopper (38a) upon maximum extension of the suspension device involving relative separation of the air chamber (22) and the air piston (37) with respect to each other.Type: GrantFiled: June 18, 2009Date of Patent: August 6, 2013Assignees: Kayaba Industry Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Atsushi Sakuta, Takuhiro Kondo, Takayuki Tachi
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Patent number: 8469370Abstract: A suspension device (S) of the present invention includes: a member (11) coupled to one of a vehicle body and a vehicle axle; an outer cylinder (3) coupled to the other one of the vehicle body and the vehicle axle and disposed at the outer circumference of the member (11); and a bearing (4) that is interposed between the member (11) and the outer cylinder (3), the bearing (4) having balls (4a) that rollably contact at least one of the member (11) and the outer cylinder (3), and a ball case (4b) that retains the balls (4a) rollably.Type: GrantFiled: October 1, 2009Date of Patent: June 25, 2013Assignees: Kayaba Industry Co., Ltd, Toyota Jidosha Kabushiki KaishaInventors: Takuhiro Kondo, Mitsuhiko Hirose, Takayuki Tachi, Yasutaka Fukumoto, Motohiko Honma
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Patent number: 8387762Abstract: A suspension device (S) of the present invention comprises: an actuator (A) including a motion conversion mechanism (T) for converting a linear motion to a rotational motion, and a motor (M) connected to a rotational member (1) which performs the rotational motion in the motion conversion mechanism (T); a fluid pressure damper (D) connected to a linear motion member (2) which performs the linear motion in the motion conversion mechanism (T); a mount (22) connected to a sprung member of a vehicle; and suspension springs (38) and (38) interposed between the mount (22) and an unsprung member, the actuator (A) being elastically supported by the mount (22) through a rubber vibration isolator (21).Type: GrantFiled: April 15, 2009Date of Patent: March 5, 2013Assignees: Kayaba Industry Co., Ltd, Toyota Jidosha Kabushiki KaishaInventors: Takuhiro Kondo, Takayuki Tachi
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Publication number: 20120187640Abstract: A suspension device (S) as a solution for the problem of the present invention includes: an active suspension unit (U) equipped with a linear actuator (A) and a first fluid pressure damper (D1) connected to the actuator (A) to extend and retract in the same direction; and a second fluid pressure damper (D2) arranged in parallel with the active suspension unit (U).Type: ApplicationFiled: October 27, 2009Publication date: July 26, 2012Inventors: Takuhiro Kondo, Yoshifumi Kobayashi, Motohiko Honma, Takayuki Tachi
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Publication number: 20120181767Abstract: A suspension device (S) of the present invention includes: a member (11) coupled to one of a vehicle body and a vehicle axle; an outer cylinder (3) coupled to the other one of the vehicle body and the vehicle axle and disposed at the outer circumference of the member (11); and a bearing (4) that is interposed between the member (11) and the outer cylinder (3), the bearing (4) having balls (4a) that rollably contact at least one of the member (11) and the outer cylinder (3), and a ball case (4b) that retains the balls (4a) rollably.Type: ApplicationFiled: October 1, 2009Publication date: July 19, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KAYABA INDUSTRY CO., LTD.Inventors: Takuhiro Kondo, Mitsuhiko Hirose, Takayuki Tachi, Yasutaka Fukumoto, Motohiko Honma
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Publication number: 20110101640Abstract: A suspension device (S) of the present invention comprises: an actuator (A) including a motion conversion mechanism (T) for converting a linear motion to a rotational motion, and a motor (M) connected to a rotational member (1) which performs the rotational motion in the motion conversion mechanism (T); a fluid pressure damper (D) connected to a linear motion member (2) which performs the linear motion in the motion conversion mechanism (T); a mount (22) connected to a sprung member of a vehicle; and suspension springs (38) and (38) interposed between the mount (22) and an unsprung member, the actuator (A) being elastically supported by the mount (22) through a rubber vibration isolator (21).Type: ApplicationFiled: April 15, 2010Publication date: May 5, 2011Inventors: Takuhiro Kondo, Takayuki Tachi
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Publication number: 20090321201Abstract: According to problem solving means of the present invention, in a suspension device (S) comprising a motion transforming mechanism (T) for transforming a linear motion of a linear motion member (1) into a rotational motion of a rotating member (2) and a motor (M) connected to the rotating member (2) in the motion transforming mechanism (T), an air spring (AS) is provided, the air spring (AS) including a tubular air chamber (22) connected to the motor (M), an air piston (37) connected to the linear motion member (1) and being tubular and smaller in diameter than the air chamber (22), and a diaphragm (27) interposed between the air chamber (22) and the air piston (37), a stopper (38a) is provided on an outer periphery of the air piston (37), and a stopper seat (46) is provided on an inner periphery of the air chamber (22) so as to be put in abutment against the stopper (38a) upon maximum extension of the suspension device involving relative separation of the air chamber (22) and the air piston (37) with respectType: ApplicationFiled: June 18, 2009Publication date: December 31, 2009Inventors: Atsushi SAKUTA, Takuhiro KONDO, Takayuki TACHI
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Publication number: 20090165581Abstract: In a ball screw device, a ball screw nut is rotated, causing a screw shaft to rectilinearly move in the axial direction, and the limit of the movement of the screw shaft is determined by a stopper. The ball screw device includes a hollow shaft that rotates together with the ball screw nut and in which the screw shaft is movably fitted. The hollow shaft is provided with a small diameter portion that exerts a dragging force on the screw shaft before the screw shaft reaches the limit, and a buffer layer is formed on a tip portion of the screw shaft.Type: ApplicationFiled: December 23, 2008Publication date: July 2, 2009Applicant: JTEKT CORPORATIONInventors: Katsura Koyagi, Tsuyoshi Kamikawa, Takayuki Tachi, Takuhiro Kondo