Patents by Inventor Yugo YAMADA

Yugo YAMADA 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).

  • Power transmission device
    Patent number: 11333205
    Abstract: A power transmission device includes an armature that is shaped into a circular ring form. The armature is configured to be coupled with a rotor by an electromagnetic attractive force of an electromagnet at a time of energizing the electromagnet and is configured to be decoupled from the rotor at a time of deenergizing the electromagnet. The armature has an armature-side friction surface that is configured to contact a rotor-side friction surface of the rotor at the time of energizing the electromagnet. The armature-side friction surface has a plurality of grooves, each of which extends from a radially inner end portion of the armature-side friction surface to a location that is on a radially inner side of a radially outer end portion of the armature-side friction surface.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: May 17, 2022
    Assignee: DENSO CORPORATION
    Inventors: Yugo Yamada, Akira Kishibuchi, Yohei Kushida, Junichi Nakagawa, Satoshi Kawakami, Toshinobu Takasaki, Kozo Tomokawa
  • POWER TRANSMISSION DEVICE
    Publication number: 20190264758
    Abstract: A power transmission device includes an armature that is shaped into a circular ring form. The armature is configured to be coupled with a rotor by an electromagnetic attractive force of an electromagnet at a time of energizing the electromagnet and is configured to be decoupled from the rotor at a time of deenergizing the electromagnet. The armature has an armature-side friction surface that is configured to contact a rotor-side friction surface of the rotor at the time of energizing the electromagnet. The armature-side friction surface has a plurality of grooves, each of which extends from a radially inner end portion of the armature-side friction surface to a location that is on a radially inner side of a radially outer end portion of the armature-side friction surface.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 29, 2019
    Inventors: Yugo YAMADA, Akira KISHIBUCHI, Yohei KUSHIDA, Junichi NAKAGAWA, Satoshi KAWAKAMI, Toshinobu TAKASAKI, Kozo TOMOKAWA
  • POWER TRANSMISSION DEVICE
    Publication number: 20190264759
    Abstract: A power transmission device includes an armature that is shaped into a circular ring form and is configured to be coupled with a rotor by an electromagnetic attractive force of an electromagnet at a time of energizing the electromagnet and is configured to be decoupled from the rotor at a time of deenergizing the electromagnet. The armature has an armature-side friction surface that is configured to contact a rotor-side friction surface of the rotor at the time of energizing the electromagnet. Grooves are formed at the armature-side friction surface such that each of the grooves extends in a form of slit from a radially inner side toward a radially outer side of the armature-side friction surface. A different type of material, which is different from a material of the armature-side friction surface, is placed in the grooves.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 29, 2019
    Inventors: Yugo YAMADA, Akira KISHIBUCHI, Junichi NAKAGAWA, Toshinobu TAKASAKI, Kozo TOMOKAWA, Satoshi KAWAKAMI, Yohei KUSHIDA