Patents by Inventor Takahiro AZUMAI

Takahiro AZUMAI 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).

  • Speed change device
    Patent number: 10174795
    Abstract: A speed change device that includes a first clutch that has a first piston, a first engagement oil chamber, and a first centrifugal hydraulic pressure cancellation chamber configured to cancel a centrifugal hydraulic pressure generated in the first engagement oil chamber; a second clutch that has a second piston, a second engagement oil chamber, and a second centrifugal hydraulic pressure cancellation chamber configured to cancel a centrifugal hydraulic pressure generated in the second engagement oil chamber and that is disposed around the first clutch; and a drum member that defines the first engagement oil chamber together with the first piston and that defines the second engagement oil chamber together with the second piston.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: January 8, 2019
    Assignee: AISIN AW CO., LTD.
    Inventor: Takahiro Azumai
  • Transmission device
    Patent number: 9958018
    Abstract: A transmission device that includes a first clutch that includes a first clutch drum, a first piston, and a first engagement oil chamber; and a second clutch that includes a second clutch drum fixed to an outer circumferential portion of the first clutch drum, a second piston, and a second engagement oil chamber.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: May 1, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Takahiro Azumai, Mitsunari Ishida
  • Transmission device
    Patent number: 9719562
    Abstract: A transmission device that includes a first clutch that includes a first clutch drum, a first piston, and a first engagement oil chamber; and a second clutch that includes a second clutch drum fixed to an outer circumferential portion of the first clutch drum, a second piston, and a second engagement oil chamber.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: August 1, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Takahiro Azumai, Mitsunari Ishida
  • Speed change device
    Patent number: 9719579
    Abstract: A speed change device that includes a first clutch that includes a first piston, a first engagement oil chamber, and a first clutch drum that has a first outer tubular portion which extends in an axial direction and with which an outer peripheral portion of a first friction engagement plate is fitted, and a second clutch that includes a second piston, a second engagement oil chamber, and a second clutch drum that has a second inner tubular portion that extends in the axial direction and that slidably supports an inner peripheral portion of the second piston.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: August 1, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Takeshi Torii, Takahiro Azumai
  • SPEED CHANGE DEVICE
    Publication number: 20170016515
    Abstract: A speed change device that includes a first clutch that includes a first piston, a first engagement oil chamber, and a first clutch drum that has a first outer tubular portion which extends in an axial direction and with which an outer peripheral portion of a first friction engagement plate is fitted, and a second clutch that includes a second piston, a second engagement oil chamber, and a second clutch drum that has a second inner tubular portion that extends in the axial direction and that slidably supports an inner peripheral portion of the second piston.
    Type: Application
    Filed: March 26, 2015
    Publication date: January 19, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Takeshi TORII, Takahiro AZUMAI
  • SPEED CHANGE DEVICE
    Publication number: 20170016490
    Abstract: A speed change device that includes a first clutch that has a first piston, a first engagement oil chamber, and a first centrifugal hydraulic pressure cancellation chamber configured to cancel a centrifugal hydraulic pressure generated in the first engagement oil chamber; a second clutch that has a second piston, a second engagement oil chamber, and a second centrifugal hydraulic pressure cancellation chamber configured to cancel a centrifugal hydraulic pressure generated in the second engagement oil chamber and that is disposed around the first clutch; and a drum member that defines the first engagement oil chamber together with the first piston and that defines the second engagement oil chamber together with the second piston.
    Type: Application
    Filed: March 20, 2015
    Publication date: January 19, 2017
    Applicant: AISIN AW CO., LTD.
    Inventor: Takahiro AZUMAI
  • TRANSMISSION DEVICE
    Publication number: 20160053826
    Abstract: A transmission device that includes a first clutch that includes a first clutch drum, a first piston, and a first engagement oil chamber; and a second clutch that includes a second clutch drum fixed to an outer circumferential portion of the first clutch drum, a second piston, and a second engagement oil chamber.
    Type: Application
    Filed: April 25, 2014
    Publication date: February 25, 2016
    Applicant: AISIN AW CO., LTD.
    Inventors: Takahiro AZUMAI, Mitsunari ISHIDA
  • TRANSMISSION DEVICE
    Publication number: 20160047426
    Abstract: A transmission device that includes a first clutch that includes a first clutch drum, a first piston, and a first engagement oil chamber; and a second clutch that includes a second clutch drum fixed to an outer circumferential portion of the first clutch drum, a second piston, and a second engagement oil chamber.
    Type: Application
    Filed: April 25, 2014
    Publication date: February 18, 2016
    Inventors: Takahiro AZUMAI, Mitsunari ISHIDA