Patents by Inventor Yoshihiro Takikawa

Yoshihiro Takikawa 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: 20180187744
    Abstract: A vibration damping device 20 includes: a crank member 22 that is coupled to a driven member 15 via a first coupling shaft A1 and that is swingable about the first coupling shaft A1 along with rotation of the driven member 15; and an inertial mass body 24 that is coupled to the driven member 15 via the crank member 22 and a connecting rod 23 and that is swung about a center of rotation RC in conjunction with the crank member 22 along with rotation of the driven member 15. A component force of a centrifugal force that acts on the crank member 22 along with rotation of the driven member 15 in a direction that is orthogonal to the direction from the center of the first coupling shaft A1 toward the center of gravity G always acts on the crank member 22 as a restoring force that acts to return the inertial mass body 24 to the center of the swing range. The component force is maximum when the inertial mass body 24 is positioned at the center of the swing range.
    Type: Application
    Filed: July 15, 2016
    Publication date: July 5, 2018
    Applicants: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, KAGOSHIMA UNIVERSITY
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Takahiro RYU, Takashi NAKAE, Kenichiro MATSUZAKI
  • Patent number: 9989136
    Abstract: A starting device where the lock-up clutch is a single-plate clutch including a piston having a friction material that is in frictional engagement with the input member; and the piston and the input element of the damper mechanism are coupled to each other on a radially inner side of the plurality of pendulum mass bodies so as to rotate together.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: June 5, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Yoshihiro Takikawa, Akihiro Nagae, Masanori Onoda, Kazuto Maruyama, Tatsuro Honda
  • Patent number: 9926993
    Abstract: A coil spring is formed by winding a wire in a coil shape. In the cross sectional shape of the wire formed in the coil shape, the inner diameter side part in the coil shape includes a semi-elliptical shape having a major radius and a minor radius and the outer diameter side part in the coil shape includes a curved shape circumscribing a circumscribed circle having a radius larger than the minor radius, arc shapes having a curvature larger than the curvature of the circumscribed circle, and linear shapes connecting both ends of the arc shapes to both ends of the semi-elliptical shape. This can increase the cross sectional shape of the wire, reduce a shearing stress, and improve the durability of the coil spring.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: March 27, 2018
    Assignee: AISIN AW CO. LTD.
    Inventors: Yoshihiro Takikawa, Yasuhiro Watanabe
  • Publication number: 20180080522
    Abstract: A damper device that includes an input element to which torque from an engine is transferred; an output element; a first intermediate element; a second intermediate element; a first elastic body that transfers torque between the input element and the first intermediate element; a second elastic body that transfers torque between the first intermediate element and the output element; a third elastic body that transfers torque between the input element and the second intermediate element; a fourth elastic body that transfers torque between the second intermediate element and the output element; and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element.
    Type: Application
    Filed: March 31, 2016
    Publication date: March 22, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Kazuhiro ITOU
  • Publication number: 20180080524
    Abstract: A damper device that includes an input element to which torque from an engine is transferred; an output element; a first intermediate element; a second intermediate element; a first elastic body that transfers torque between the input element and the first intermediate element; a second elastic body that transfers torque between the first intermediate element and the output element; a third elastic body that transfers torque between the input element and the second intermediate element; a fourth elastic body that transfers torque between the second intermediate element and the output element; and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element.
    Type: Application
    Filed: June 8, 2016
    Publication date: March 22, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Kazuhiro ITOU, Nobuo SUZUKI
  • Publication number: 20180080523
    Abstract: A damper device that includes an input element to which torque from an engine is transferred; an output element; a first intermediate element; a second intermediate element; a first elastic body that transfers torque between the input element and the first intermediate element; a second elastic body that transfers torque between the first intermediate element and the output element; a third elastic body that transfers torque between the input element and the second intermediate element; a fourth elastic body that transfers torque between the second intermediate element and the output element; and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element.
    Type: Application
    Filed: March 31, 2016
    Publication date: March 22, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Kazuhiro ITOU
  • Publication number: 20180073594
    Abstract: A damper device that includes an input element to which torque from an engine is transferred; an output element; a first intermediate element; a second intermediate element; a first elastic body that transfers torque between the input element and the first intermediate element; a second elastic body that transfers torque between the first intermediate element and the output element; a third elastic body that transfers torque between the input element and the second intermediate element; a fourth elastic body that transfers torque between the second intermediate element and the output element; and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element.
    Type: Application
    Filed: March 31, 2016
    Publication date: March 15, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Kazuhiro ITOU, Nobuo SUZUKI
  • Patent number: 9915318
    Abstract: A centrifugal-pendulum vibration absorbing device disposed within a liquid chamber that stores a liquid, the centrifugal-pendulum vibration absorbing device having a support member coupled to a rotary element that is rotated by power from a drive device; and a mass body supported by the support member so as to be swingable. An order of vibration of the mass body is determined on the basis of an order of vibration to be damped generated by the drive device in consideration of at least a force caused by a centrifugal liquid pressure generated within the liquid chamber along with rotation of the drive device to act on the mass body.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: March 13, 2018
    Assignees: AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD
    Inventors: Yoshihiro Takikawa, Yoichi Oi, Hiroki Nagai, Takayuki Miyaoka, Yuichiro Hirai, Takuya Yoshikawa, Tomonori Kinoshita, Aki Ogawa
  • Patent number: 9791019
    Abstract: An intermediate member of a damper device includes a plate portion that has spring abutment portions that abut against inner springs. Spring abutment portions of a coupling member of a dynamic damper extend from a fixed portion via a bent portion to be disposed in opening portions of the plate portion, and abut against end portions of third springs disposed in the opening portions such that the third springs are arranged side by side with the inner springs in the circumferential direction. The plate portion and the spring abutment portions at least partially overlap each other in the thickness direction. The axes of the inner springs and the third springs are included within the range of overlap between the plate portion and the spring abutment portions in the thickness direction.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: October 17, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Yoshihiro Takikawa, Yoichi Oi, Takayuki Miyaoka, Yuichiro Hirai, Makoto Yamaguchi, Takuya Yoshikawa, Masahiro Hata
  • Publication number: 20170261065
    Abstract: A damper device includes first inner springs configured to transmit a torque between a drive member and an intermediate member, second inner springs configured to transmit a torque between the intermediate member and a driven member, and a rotary inertia mass damper including a sun gear serving as a mass body rotating with relative rotation of the drive member to the driven member. The rotary inertia mass damper is provided in parallel to a torque transmission path including the intermediate member, the first inner springs and the second inner springs. A damping ratio ? of the intermediate member determined based on a moment of inertia J2 of the intermediate member and rigidities k1 and k2 of the first and the second inner springs and is less than a value.
    Type: Application
    Filed: December 25, 2015
    Publication date: September 14, 2017
    Applicants: AISIN AW INDUSTRIES CO., LTD, AISIN AW CO., LTD.
    Inventors: Takuya YOSHIKAWA, Aki OGAWA, Tomonori KINOSHITA, Yuji KANYAMA, Makoto YAMAGUCHI, Kazuyoshi ITO, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Kazuhiro ITOU, Yoshihiro TAKIKAWA, Yoichi OI
  • Patent number: 9732824
    Abstract: A damper device 10 includes a dynamic damper 30 that has third springs SP3 coupled to an intermediate member 12 and that also has, as a mass body coupled to the third springs SP3, a turbine runner 5, a coupling member 31, etc. The third springs SP3 of the dynamic damper 30 are disposed so as to overlap both in the axial and radial directions of the damper device 10 second springs SP2 that are disposed inward of the first springs SP1 to transfer torque between a drive member 11 and a driven member 15. A plane PL including the axes of the third springs SP3 and perpendicular to the axis of the damper device 10 is included in the range of the thickness of spring contact portions 31c of the coupling member 31 in the axial direction of the damper device 10.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: August 15, 2017
    Assignees: AISIN AW CO., LTD., AISIN AW INDUSTRIES CO.
    Inventors: Yoshihiro Takikawa, Yoichi Oi, Takayuki Miyaoka, Yuichiro Hirai, Makoto Yamaguchi, Takuya Yoshikawa, Tomonori Kinoshita, Aki Ogawa, Masahiro Hata
  • Publication number: 20170227088
    Abstract: A damper device with a first intermediate element; a second intermediate element; a first elastic body that transmits torque between the input element and the first intermediate element; a second elastic body that transmits torque between the first intermediate element and the output element; a third elastic body that transmits torque between the input element and the second intermediate element; a fourth elastic body that transmits torque between the second intermediate element and the output element; and a fifth elastic body that transmits torque between the first intermediate element and the second intermediate element.
    Type: Application
    Filed: September 14, 2015
    Publication date: August 10, 2017
    Applicant: Aisin AW Co., Ltd.
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Kazuhiro ITOU
  • Patent number: 9709127
    Abstract: In a starting device including a centrifugal-pendulum vibration absorbing device, while lock-up is released, a flow of working oil directed from a lock-up piston side toward a damper mechanism is produced in a clutch engagement chamber. A thrust force in the axial direction directed from the lock-up piston toward the damper mechanism is applied to a weight, of a mass body of the centrifugal-pendulum vibration absorbing device, disposed on the lock-up piston side. A support member of the centrifugal-pendulum vibration absorbing device is provided with weight support protrusions that project in the axial direction of an input shaft of a speed change device toward the weight disposed on the lock-up piston side.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: July 18, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Yoshihiro Takikawa, Akihiro Nagae, Kazuto Maruyama
  • Publication number: 20170159746
    Abstract: A damper device where the first and second elastic bodies are arranged side by side in a circumferential direction of the damper device, and the third and fourth elastic bodies are placed outside the first and second elastic bodies in a radial direction of the damper device so as to be arranged side by side in the circumferential direction.
    Type: Application
    Filed: August 5, 2015
    Publication date: June 8, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Takao SAKAMOTO, Kazuhiro ITOU
  • Publication number: 20170152914
    Abstract: A damper device that includes a first torque transmission path including a first elastic body that transmits torque between the input element and the output element; and a second torque transmission path disposed in parallel with the first torque transmission path and including first and second intermediate elements, a second elastic body that transmits the torque between the input element and the first intermediate element, a third elastic body that transmits the torque between the first intermediate element and the second intermediate element, and a fourth elastic body that transmits the torque between the second intermediate element and the output element.
    Type: Application
    Filed: August 20, 2015
    Publication date: June 1, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Takao SAKAMOTO, Kazuhiro ITOU
  • Publication number: 20170138436
    Abstract: A damper device including an input to which power from an internal combustion engine is transmitted and an output, the damper device including: a first torque transmission path including a first elastic body that transmits torque between the input and the output; and a second torque transmission path disposed in parallel with the first torque transmission path and including an intermediate element, a second elastic body that transmits the torque between the input and the intermediate element, and a third elastic body that transmits the torque between the intermediate element and the output, wherein the second and third elastic bodies are placed outside the first elastic body in a radial direction of the damper device so as to be arranged side by side in a circumferential direction of the damper device.
    Type: Application
    Filed: August 5, 2015
    Publication date: May 18, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Yoichi OI, Hiroki NAGAI, Kazuhiro ITOU
  • Publication number: 20170108072
    Abstract: A coil spring is formed by winding a wire in a coil shape. In the cross sectional shape of the wire formed in the coil shape, the inner diameter side part in the coil shape includes a semi-elliptical shape having a major radius and a minor radius and the outer diameter side part in the coil shape includes a curved shape circumscribing a circumscribed circle having a radius larger than the minor radius, arc shapes having a curvature larger than the curvature of the circumscribed circle, and linear shapes connecting both ends of the arc shapes to both ends of the semi-elliptical shape. This can increase the cross sectional shape of the wire, reduce a shearing stress, and improve the durability of the coil spring.
    Type: Application
    Filed: July 7, 2015
    Publication date: April 20, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Yasuhiro WATANABE
  • Publication number: 20170037929
    Abstract: A centrifugal pendulum-type vibration absorbing device includes a support member that is coupled to a driven member that is a rotary element that rotates by means of power from an engine and a mass body that is coupled to the support member so as to oscillate about a pendulum fulcrum PF and is designed so as to have an effective order qeff that is greater by a correction amount ?q that is at least associated with the non-linearity of an order q of vibration of the centrifugal pendulum-type vibration absorbing device that is dependent on an oscillation angle ? of the mass body than an order qtag of vibration that is generated in the engine to be damped.
    Type: Application
    Filed: January 16, 2015
    Publication date: February 9, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Yoichi OI, Hiroki NAGAI, Kazuhiro ITOU
  • Publication number: 20160327142
    Abstract: A starting device where the lock-up clutch is a single-plate clutch including a piston having a friction material that is in frictional engagement with the input member; and the piston and the input element of the damper mechanism are coupled to each other on a radially inner side of the plurality of pendulum mass bodies so as to rotate together.
    Type: Application
    Filed: December 17, 2014
    Publication date: November 10, 2016
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Akihiro NAGAE, Masanori ONODA, Kazuto MARUYAMA, Tatsuro HONDA
  • Publication number: 20160208885
    Abstract: An intermediate member of a damper device includes a plate portion that has spring abutment portions that abut against inner springs. Spring abutment portions of a coupling member of a dynamic damper extend from a fixed portion via a bent portion to be disposed in opening portions of the plate portion, and abut against end portions of third springs disposed in the opening portions such that the third springs are arranged side by side with the inner springs in the circumferential direction. The plate portion and the spring abutment portions at least partially overlap each other in the thickness direction. The axes of the inner springs and the third springs are included within the range of overlap between the plate portion and the spring abutment portions in the thickness direction.
    Type: Application
    Filed: October 16, 2014
    Publication date: July 21, 2016
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Yoichi OI, Takayuki MIYAOKA, Yuichiro HIRAI, Makoto YAMAGUCHI, Takuya YOSHIKAWA, Masahiro HATA