Patents by Inventor Fumiaki AIKAWA

Fumiaki AIKAWA 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).

  • Hydraulic control device for automatic transmission
    Patent number: 11499632
    Abstract: A hydraulic control device that includes a primary pressure control valve that has a first valve element and that regulates the primary pressure by varying a position of the first valve element in accordance with operation of a first electromagnetic actuator; a secondary pressure control valve that has a second valve element and that regulates the secondary pressure by varying a position of the second valve element in accordance with operation of a second electromagnetic actuator; and a fail-safe valve that varies the position of the first valve element such that the primary pressure is reduced when the first electromagnetic actuator and the second electromagnetic actuator become inoperable.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: November 15, 2022
    Assignee: AISIN CORPORATION
    Inventors: Kenichi Tsuchida, Koji Makino, Toshiaki Hayashi, Fumiaki Aikawa, Harunobu Umemura
  • Hydraulic control device for automatic transmission
    Patent number: 10626985
    Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: April 21, 2020
    Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuharu Asai, Makoto Sawada, Kyohei Suzumura, Mitsuhiro Fukao, Kenichi Tsuchida, Yoshimitsu Hyodo, Toshiaki Hayashi, Fumiaki Aikawa, Yuta Seriguchi, Syuji Moriyama, Yoshinobu Soga, Hiromitsu Nitani
  • HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
    Publication number: 20190390768
    Abstract: In the case where an automatic transmission is configured such that the winding diameter of a belt around a primary pulley (41) is larger than the winding diameter of the belt around a secondary pulley (42) when a primary pressure and a secondary pressure are equal to each other, a fail-safe valve (124) varies the position of a first valve element (123p1) of a primary pressure control valve (123P) such that the primary pressure is reduced when a first electromagnetic actuator (SLPs) and a second electromagnetic actuator (SLSs) become inoperable.
    Type: Application
    Filed: March 30, 2018
    Publication date: December 26, 2019
    Applicant: AISIN AW CO., LTD.
    Inventors: Kenichi TSUCHIDA, Koji MAKINO, Toshiaki HAYASHI, Fumiaki AIKAWA, Harunobu UMEMURA
  • HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
    Publication number: 20180313444
    Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.
    Type: Application
    Filed: November 21, 2016
    Publication date: November 1, 2018
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuharu ASAI, Makoto SAWADA, Kyohei SUZUMURA, Mitsuhiro FUKAO, Kenichi TSUCHIDA, Yoshimitsu HYODO, Toshiaki HAYASHI, Fumiaki AIKAWA, Yuta SERIGUCHI, Syuji MORIYAMA, Yoshinobu SOGA, Hiromitsu NITANI