Patents by Inventor Tatsuo Okumura

Tatsuo Okumura 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).

  • Patent number: 11958219
    Abstract: The present disclosure provides a foam molded product and a manufacturing method. The foam molded product is includes a foam body, an insert material having a display unit or a detection unit attached to the foam body, and a surface material affixed to a surface to which at least the insert material is attached. A manufacturing method includes: preparing a pair of molds including a first mold and a second mold; affixing an insert material and a surface material together such that the surface material is in contact with a molding surface of the first mold; closing the pair of molds; injecting a foam resin into a molding space formed by closing the molds; foaming the foam resin to form a foam body; opening the pair of molds; and removing a molded product in which the affixed part and the foam body are integrated.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: April 16, 2024
    Assignee: NISSHA CO., LTD.
    Inventors: Tatsuo Ito, Kenji Okumura, Jun Sasaki, Daichi Hama, Masaru Terashita
  • Patent number: 6923902
    Abstract: A method for detecting the concentration of a specific component in gas discharged from an internal combustion engine, which includes detecting the concentration of the specific component under certain driving conditions to determine a zero point, which indicates a zero concentration of the specific component, of the detection output; calibrating the detection output of the gas sensor based on the determined zero point; and detecting the concentration of the specific component in exhaust gas based on the calibrated detection output.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: August 2, 2005
    Assignee: NGK Spark Plug Co, Ltd.
    Inventors: Masashi Ando, Noboru Ishida, Satoshi Sugaya, Takafumi Oshima, Norihiko Nadanami, Takaki Otsuka, Yoshikuni Sato, Tatsuo Okumura, Yasuhisa Kuzuya
  • Patent number: 6743352
    Abstract: A method for detecting the concentration of a specific gas (NOx) in an engine exhaust gas using a gas sensor and a process of correcting the gas sensor. According to the correcting process, the amount of moisture in the exhaust gas is estimated, then a a gas concentration detection signal output by the gas sensor on the basis of an estimated amount of moisture is corrected. Finally, the effect of the amount of moisture in the exhaust gas is removed or reduced from the detected value of gas concentration.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: June 1, 2004
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masashi Ando, Noboru Ishida, Satoshi Sugaya, Takafumi Oshima, Norihiko Nadanami, Takaki Otsuka, Yoshikuni Sato, Tatsuo Okumura, Yasuhisa Kuzuya
  • Patent number: 6695964
    Abstract: Method and sensor for measuring accurate measurement of NOx concentration in an exhaust gas containing O2,H2O, CO2 and NOx and a NOx gas concentration sensor. A first oxygen pump cell sufficiently pumps out oxygen in a measurement gas such as not to decompose NOx. A pair of electrodes is provided on an inner side and an outer side of a second measurement chamber into which the gas is introduced from a first measurement chamber via a diffusion resistance. A voltage is impressed across the paired electrodes for decomposing NOx in the second measurement chamber to dissociate oxygen which causes the current to flow in a second oxygen ion pump cell. The NOx gas concentration is measured for this current. The voltage impressed across the paired electrodes of the second oxygen ion pump cell is set so as not to dissociate H2O and CO2 present in the second measurement chamber.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: February 24, 2004
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masashi Ando, Noboru Ishida, Satoshi Sugaya, Takafumi Oshima, Norihiko Nadanami, Takaki Ootuka, Yoshikuni Sato, Tatsuo Okumura
  • Publication number: 20030042151
    Abstract: A method for detecting the concentration of a specific gas (NOx) in an engine exhaust gas using a gas sensor and a process of correcting the gas sensor. According to the correcting process, the amount of moisture in the exhaust gas is estimated, then a gas concentration detection signal output by the gas sensor on the basis of an estimated amount of moisture is corrected.
    Type: Application
    Filed: February 6, 2002
    Publication date: March 6, 2003
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masashi Ando, Noboru Ishida, Satoshi Sugaya, Takafumi Oshima, Norihiko Nadanami, Takaki Otsuka, Yoshikuni Sato, Tatsuo Okumura, Yasuhisa Kuzuya
  • Publication number: 20020130053
    Abstract: A method for detecting the concentration of a specific gas (NOx) in an engine exhaust gas using a gas sensor and a process of correcting the gas sensor. According to the correcting process, the amount of moisture in the exhaust gas is estimated, then a a gas concentration detection signal output by the gas sensor on the basis of an estimated amount of moisture is corrected.
    Type: Application
    Filed: February 6, 2002
    Publication date: September 19, 2002
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masashi Ando, Noboru Ishida, Satoshi Sugaya, Takafumi Oshima, Norihiko Nadanami, Takaki Otsuka, Yoshikuni Sato, Tatsuo Okumura, Yasuhisa Kuzuya
  • Patent number: 6375828
    Abstract: A nitrogen oxide concentration detector has a first measurement chamber 2 into which is introduced a measurement gas via a first diffusion resistance 1; an oxygen concentration detection electrode 7a for measuring the oxygen concentration in the measurement gas in said first measurement chamber 1; a first oxygen ion pump cell 6 for pumping out oxygen in the measurement gas from said first measurement chamber 2 based on the potential of said oxygen concentration detection electrode 7a; a second measurement chamber 8 into which the gas is introduced from said first measurement chamber 2 via a second diffusion resistance 3; and a second oxygen ion pump cell 8 having a pair of electrodes 8a,8b across which a voltage is applied to decompose NOx in the second measurement chamber 4 to pump out dissociated oxygen to cause a circuit Ip2 corresponding to the NOx concentration to flow in the second oxygen ion pump cell 8. Variation of NOx concentration is a function of variation of Ip2.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: April 23, 2002
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masashi Ando, Noboru Ishida, Satoshi Sugaya, Takafumi Oshima, Norihiko Nadanami, Takaki Otsuka, Yoshikuni Sato, Tatsuo Okumura, Yasuhisa Kuzuya
  • Publication number: 20020017467
    Abstract: A nitrogen oxide concentration detector has a first measurement chamber 2 into which is introduced a measurement gas via a first diffusion resistance 1; an oxygen concentration detection electrode 7a for measuring the oxygen concentration in the measurement gas in said first measurement chamber 1; a first oxygen ion pump cell 6 for pumping out oxygen in the measurement gas from said first measurement chamber 2 based on the potential of said oxygen concentration detection electrode 7a; a second measurement chamber 8 into which the gas is introduced from said first measurement chamber 2 via a second diffusion resistance 3; and a second oxygen ion pump cell 8 having a pair of electrodes 8a,8b across which a voltage is applied to decompose NOx in the second measurement chamber 4 to pump out dissociated oxygen to cause a current Ip2 corresponding to the NOx concentration to flow in the second oxygen ion pump cell 8. Variation of NOx concentration is a function of variation of Ip2.
    Type: Application
    Filed: March 23, 1998
    Publication date: February 14, 2002
    Inventors: MASASHI ANDO, NOBORU ISHIDA, SATOSHI SUGAYA, TAKAFUMI OSHIMA, NORIHIKO NADANAMI, TAKAKI OTSUKA, YOSHIKUNI SATO, TATSUO OKUMURA, YASUHISA KUZUYA
  • Patent number: 6214208
    Abstract: This is a method and apparatus for accurately determining a NOx concentration of a measurement gas that contains H2O and/or CO2, without being affected by a dissociation of H2O and/or CO2.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: April 10, 2001
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masashi Ando, Noboru Ishida, Satoshi Sugaya, Takafumi Oshima, Norihiko Nadanami, Takaki Ootuka, Yoshikuni Sato, Tatsuo Okumura