Patents by Inventor Masana OKAI

Masana OKAI 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: 20220026388
    Abstract: A gas sensor including a plate-shaped sensor element having an electrode pad on an outer surface of the sensor element on a rear end side thereof, and a metal terminal member electrically connected to the electrode pad. The metal terminal member includes a body portion and an element abutting portion extending from the body portion and bent toward the electrode pad. A portion of the element abutting portion is in contact with the electrode pad in a state in which the element abutting portion is elastically deflected. The element abutting portion has a flat main surface facing the sensor element, and a sloping surface provided on at least one of end portions in a width direction of the metal terminal member. The sloping surface is connected to the main surface and extends toward an opposite side in a thickness direction of the element abutting portion.
    Type: Application
    Filed: February 8, 2019
    Publication date: January 27, 2022
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Takehiro OBA, Masana OKAI
  • Publication number: 20210349051
    Abstract: A gas sensor is configured to inhibit wear of a metal member contacting with a member containing ceramic. The gas sensor comprising: a first member containing ceramic; and a metal member contacting with the first member, wherein a hardness h1 of a contact part of the metal member contacting with the first member is greater than a hardness h2 of a reference part exhibiting a maximum thickness of the metal member.
    Type: Application
    Filed: March 16, 2020
    Publication date: November 11, 2021
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masana OKAI, Takehiro OBA, Masaaki ANDO
  • Publication number: 20210247339
    Abstract: A ceramic member unit includes at least insertion members and a ceramic member having insertion sections into which the insertion members are inserted respectively. Each of the insertion sections has at least an insertion opening which opens on a deeper side of an introduction opening in the surface of the ceramic member while communicating with the introduction opening and into which the insertion member can be inserted. The insertion section further has taper hole portions becoming narrower toward the insertion opening in a communication region between the introduction opening and the insertion opening. The taper hole portions are connected to the insertion opening while increasing in a taper angle toward the insertion opening.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 12, 2021
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masana OKAI, Kouji MATSUO, Daisuke TAHIRA
  • Publication number: 20210072177
    Abstract: A gas sensor including: a sensor element extending in an axial direction; a metal shell surrounding and supporting the sensor element; an exterior tube that is tubular and is mounted to a rear end of the metal shell; a metal terminal including a first end connected to a lead wire and a second end electrically connected to the sensor element; a separator that is tubular and is disposed in the exterior tube and contains the metal terminal and the sensor element; and a holder being in contact with the separator in the axial direction. The holder includes ribs formed in a frontward face or a rearward face of the holder and arranged at predetermined intervals in a circumferential direction. Each of the ribs occupies a region having a length equal to or greater than a thickness of the holder, as viewed in the axial direction.
    Type: Application
    Filed: February 8, 2019
    Publication date: March 11, 2021
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masana OKAI, Takehiro OBA, Daisuke TAHIRA, Masashi NOMURA