Patents by Inventor Tomohisa Fujita

Tomohisa Fujita 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).

  • Gas sensor
    Patent number: 9513252
    Abstract: In a gas sensor (100), a base end portion (175b) of a second outer wall (175) of an outer protector (171) is connected airtightly to a forward end portion (164c) of a first inner wall (164) of an inner protector (161), and relations of A?B<C<D and (0.6×B)?A are satisfied, wherein A represents the total opening area of a second outer hole (176) of the outer protector (171), B represents the total opening area of a second inner hole (166) of the inner protector (161), C represents the total opening area of a first inner hole (167), and D represents the total opening area of a first outer hole.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: December 6, 2016
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Tomohisa Fujita, Nobuhiro Inoue, Makoto Kume
  • Gas sensor
    Patent number: 9194724
    Abstract: In a gas sensor (100), a base end portion (175b) of a second outer wall (175) of an outer protector (171) is airtightly connected to a forward end portion (164c) of a first inner wall (164) of an inner protector (161). The outer protector (171) has a taper wall (172) which is located on the axially forward end side of the second outer wall (175). The taper wall (172) has the shape of a tapered tube whose diameter decreases toward the axially forward end side, and has a second outer hole (176), which is a forward end opening. The entire taper wall (172) is disposed on the axially forward end side in relation to the inner bottom wall (162) of the inner protector (161).
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: November 24, 2015
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Tomohisa Fujita, Nobuhiro Inoue, Makoto Kume
  • GAS SENSOR
    Publication number: 20150101394
    Abstract: In a gas sensor (100), a base end portion (175b) of a second outer wall (175) of an outer protector (171) is connected airtightly to a forward end portion (164c) of a first inner wall (164) of an inner protector (161), and relations of A?B<C<D and (0.6×B)?A are satisfied, wherein A represents the total opening area of a second outer hole (176) of the outer protector (171), B represents the total opening area of a second inner hole (166) of the inner protector (161), C represents the total opening area of a first inner hole (167), and D represents the total opening area of a first outer hole.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 16, 2015
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Tomohisa FUJITA, Nobuhiro INOUE, Makoto KUME
  • Detection method for defect of sensor
    Patent number: 8513961
    Abstract: A defect detection method for a sensor in which a fixing member provides a seal between a sensor element and tubular metallic members, the method being capable of detecting breakage of a conductor caused by breakage of the element.
    Type: Grant
    Filed: January 18, 2010
    Date of Patent: August 20, 2013
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Tomohisa Fujita, Takeshi Kawai, Satoshi Teramoto, Shigeki Mori
  • DETECTION METHOD FOR DEFECT OF SENSOR
    Publication number: 20100225339
    Abstract: A defect detection method for a sensor in which a fixing member provides a seal between a sensor element and tubular metallic members, the method being capable of detecting breakage of a conductor caused by breakage of the element.
    Type: Application
    Filed: January 18, 2010
    Publication date: September 9, 2010
    Inventors: Tomohisa Fujita, Takeshi Kawai, Satoshi Teramoto, Shigeki Mori
  • Headrest
    Patent number: D484349
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: December 30, 2003
    Assignee: Neue Classe of America, Inc.
    Inventor: Tomohisa Fujita