Patents by Inventor Hisao Ohnishi
Hisao Ohnishi 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).
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Publication number: 20190250134Abstract: A gas alarm for detecting a target gas based on a resistance value of a sensor element comprises a measuring unit to measure a characteristic value of the sensor element, a heating control unit to control a heater to perform a heating process to heat the sensor element, a determining unit to determine, based on the characteristic value, whether the sensor element is in a blunt state in which sensitivity of the sensor element is decreased, and an aborting control unit to abort the heating process to determine whether the sensor element is in the blunt state when a characteristic value of the sensor element measured by the measuring unit after beginning of the heating process by the heating control unit meets a predetermined condition.Type: ApplicationFiled: April 25, 2019Publication date: August 15, 2019Inventors: Naoyoshi MURATA, Takuya SUZUKI, Makoto OKAMURA, Tsuyoshi KAMIOKA, Hisao OHNISHI, Atsushi NONAKA
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Patent number: 10347929Abstract: Realized are a high-performance electrochemical element and solid oxide fuel cell in which the contact properties between a dense and highly-gastight electrolyte layer and an electrode layer are improved while the treatment temperature during formation of the electrolyte layer is suppressed to a low temperature, and methods for producing the same. An electrochemical element includes an electrode layer 3, and an electrolyte layer 4 arranged on the electrode layer 3, wherein the electrode layer 3 has a plurality of pores that are open on a face thereof in contact with the electrolyte layer 4, and the pores are filled with fine particles made of the same components as the electrolyte layer 4.Type: GrantFiled: September 18, 2015Date of Patent: July 9, 2019Assignees: Osaka Gas Co., Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Mitsuaki Echigo, Hisao Ohnishi, Kyohei Manabe, Osamu Yamazaki, Kazuyuki Minami, Jun Akedo, Toshio Suzuki
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Publication number: 20190154609Abstract: A gas alarm device is provided, where a heating control section extends a heating period of time of a heater section if a first determination section determines that electrical characteristics of a sensing section of a gas sensor satisfy a first condition, and continues extension of the heating period of time of the heater section according to a determination result, by a second determination section, of whether or not the electrical characteristics upon lapse of extension of the heating period of time satisfy a second condition, and a gas detection section determines, according to the electrical characteristics upon lapse of extension time, that detection target gas is detected.Type: ApplicationFiled: January 21, 2019Publication date: May 23, 2019Inventors: Naoyoshi MURATA, Takuya SUZUKI, Makoto OKAMURA, Tsuyoshi KAMIOKA, Hisao OHNISHI, Atsushi NONAKA
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Publication number: 20180269489Abstract: Realized is an element having an electrolyte layer that is dense and has high gas barrier characteristics. A metal-supported electrochemical element includes at least a metal substrate as a support, an electrode layer formed on/over the metal substrate, a buffer layer formed on the electrode layer, and an electrolyte layer formed on the buffer layer. The electrode layer is porous and the electrolyte layer is dense. The buffer layer has density higher than density of the electrode layer and lower than density of the electrolyte layer.Type: ApplicationFiled: September 14, 2016Publication date: September 20, 2018Inventors: Mitsuaki Echigo, Hisao Ohnishi, Kyohei Manabe, Osamu Yamazaki, Kazuyuki Minami, Yuji Tsuda
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Patent number: 10020527Abstract: Realized are an electrochemical element and a solid oxide fuel cell that have a dense electrolyte layer and that have excellent durability and robustness, and methods for producing the same. An electrochemical element includes: a metal substrate 2 having a plurality of through holes 21; an electrode layer 3 provided over a front face of the metal substrate 2; and an electrolyte layer 4 provided over the electrode layer 3, wherein the through holes 21 are provided passing through the front face and a back face of the metal substrate 2, the electrode layer 3 is provided in a region larger than a region, of the metal substrate 2, in which the through holes 21 are provided, and the electrolyte layer 4 has a first portion 41 coating the electrode layer 3, and a second portion 42 that is in contact with the front face of the metal substrate 2.Type: GrantFiled: September 18, 2015Date of Patent: July 10, 2018Assignee: Osaka Gas Co., Ltd.Inventors: Mitsuaki Echigo, Hisao Ohnishi, Kyohei Manabe, Osamu Yamazaki, Kazuyuki Minami, Yuji Tsuda
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Publication number: 20170309941Abstract: Realized are an electrochemical element and a solid oxide fuel cell that have a dense electrolyte layer and that have excellent durability and robustness, and methods for producing the same. An electrochemical element includes: a metal substrate 2 having a plurality of through holes 21; an electrode layer 3 provided over a front face of the metal substrate 2; and an electrolyte layer 4 provided over the electrode layer 3, wherein the through holes 21 are provided passing through the front face and a back face of the metal substrate 2, the electrode layer 3 is provided in a region larger than a region, of the metal substrate 2, in which the through holes 21 are provided, and the electrolyte layer 4 has a first portion 41 coating the electrode layer 3, and a second portion 42 that is in contact with the front face of the metal substrate 2.Type: ApplicationFiled: September 18, 2015Publication date: October 26, 2017Inventors: Mitsuaki Echigo, Hisao Ohnishi, Kyohei Manabe, Osamu Yamazaki, Kazuyuki Minami, Yuji Tsuda
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Publication number: 20170301941Abstract: Realized are a high-performance electrochemical element and solid oxide fuel cell in which the contact properties between a dense and highly-gastight electrolyte layer and an electrode layer are improved while the treatment temperature during formation of the electrolyte layer is suppressed to a low temperature, and methods for producing the same. An electrochemical element includes an electrode layer 3, and an electrolyte layer 4 arranged on the electrode layer 3, wherein the electrode layer 3 has a plurality of pores that are open on a face thereof in contact with the electrolyte layer 4, and the pores are filled with fine particles made of the same components as the electrolyte layer 4.Type: ApplicationFiled: September 18, 2015Publication date: October 19, 2017Inventors: Mitsuaki Echigo, Hisao Ohnishi, Kyohei Manabe, Osamu Yamazaki, Kazuyuki Minami, Jun Akedo, Toshio Suzuki
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Patent number: 8736274Abstract: A method and apparatus for diagnosing an electrochemical sensor that detects the concentration of a gas are operative for diagnosing whether or not the sensor is in an error state due to a rise in a resistance in the electrolyte of the sensor. Such detection is made on the basis of a current flowing between a sensing electrode and an opposite electrode or a voltage corresponding to the current. A method for diagnosing an electrochemical sensor having a solid or liquid electrolyte between a sensing electrode and an opposite electrode detects the concentration of the gas to be detected on the basis of a current flowing between the sensing electrode and the opposite electrode, or a voltage corresponding to the current. Whether or not the electrochemical sensor is in an error state is diagnosed on the basis of a resistance of the electrolyte between the two electrodes of the electrolyte.Type: GrantFiled: April 26, 2011Date of Patent: May 27, 2014Assignees: Osaka Gas Co., Ltd., Figaro Engineering Inc.Inventors: Atsushi Nonaka, Hisao Ohnishi, Hidemasa Nonaka, Toshiro Nakayama, Tomohiro Inoue, Yuki Kato
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Publication number: 20120274337Abstract: A method and apparatus for diagnosing an electrochemical sensor that detects the concentration of a gas are operative for diagnosing whether or not the sensor is in an error state due to a rise in a resistance in the electrolyte of the sensor. Such detection is made on the basis of a current flowing between a sensing electrode and an opposite electrode or a voltage corresponding to the current. A method for diagnosing an electrochemical sensor having a solid or liquid electrolyte between a sensing electrode and an opposite electrode detects the concentration of the gas to be detected on the basis of a current flowing between the sensing electrode and the opposite electrode, or a voltage corresponding to the current. Whether or not the electrochemical sensor is in an error state is diagnosed on the basis of a resistance of the electrolyte between the two electrodes of the electrolyte.Type: ApplicationFiled: April 26, 2011Publication date: November 1, 2012Applicants: FIGARO ENGINEERING INC., OSAKA GAS CO., LTD.Inventors: Atsushi Nonaka, Hisao Ohnishi, Hidemasa Nonaka, Toshiro Nakayama, Tomohiro Inoue, Yuki Kato
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Patent number: 6938495Abstract: In the method for measuring the velocity of fluid or visualizing the distribution of fluid by feeding tracer particles to the fluid, irradiating the fluid with light and observing return light from the tracer particles, tracer particles containing a flourescent substance are fed at least partially to the fluid and the fluid is irradiated with exciting light to cause the tracer particles to output flourescent emissions. A filter which does not transmit the exciting light is used to substantially selectively observe the flourecent emissions of the tracer particles. This method results in a remarkable improvement in the accuracy of flow velocity measurement or visualization of fluid distribution. Moreover, in a mixed fluid system consisting of two or more different fluids, the pattern of behavior of each fluid and the intermingled state of the fluids can be observed by using a plurality of different tracer particles.Type: GrantFiled: July 24, 2001Date of Patent: September 6, 2005Assignees: Osaka Gas Company Limited, Liquid Gas Co., Ltd.Inventors: Akira Hirano, Masahide Tsujishita, Hisao Ohnishi, Masashi Nishigaki, Masamichi Ippommatsu, Tsuyoshi Tsurutani
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Publication number: 20050175887Abstract: The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium, osmium, rhodium or iridium, or an alloy containing the metal. The process for manufacture of the fuel electrode comprises coating an electrode material with a solution or dispersion of the high-melting metal and/or its chloride, sintering the same and finally reducing the product.Type: ApplicationFiled: February 28, 2005Publication date: August 11, 2005Applicant: Osaka Gas Company LimitedInventors: Masamichi Ippommatsu, Minoru Suzuki, Hirokazu Sasaki, Shoji Otoshi, Hisao Ohnishi
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Publication number: 20050176156Abstract: In the method for measuring the velocity of fluid or visualizing the distribution of fluid by feeding tracer particles to the fluid, irradiating the fluid with light and observing return light from the tracer particles, tracer particles containing a flourescent substance are fed at least partially to the fluid and the fluid is irradiated with exciting light to cause the tracer particles to output flourescent emissions. A filter which does not transmit the exciting light is used to substantially selectively observe the flourecent emissions of the tracer particles. This method results in a remarkable improvement in the accuracy of flow velocity measurement or visualization of fluid distribution. Moreover, in a mixed fluid system consisting of two or more different fluids, the pattern of behavior of each fluid and the intermingled state of the fluids can be observed by using a plurality of different tracer particles.Type: ApplicationFiled: April 6, 2005Publication date: August 11, 2005Applicants: Osaka Gas Company Limited, Liquid Gas Co., Ltd.Inventors: Akira Hirano, Masahide Tsujishita, Hisao Ohnishi, Masashi Nishigaki, Masamichi Ippommatsu, Tsuyoshi Tsurutani
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Patent number: 6864204Abstract: The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium, osmium, rhodium or iridium, or an alloy containing the metal. The process for manufacture of the fuel electrode comprises coating an electrode material with a solution or dispersion of the high-melting metal and/or its chloride, sintering the same and finally reducing the product.Type: GrantFiled: July 23, 2002Date of Patent: March 8, 2005Assignee: Osaka Gas Company LimitedInventors: Masamichi Ippommatsu, Minoru Suzuki, Hirokazu Sasaki, Shoji Otoshi, Hisao Ohnishi
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Publication number: 20040118217Abstract: In the method for measuring the velocity of fluid or visualizing the distribution of fluid by feeding tracer particles to the fluid, irradiating the fluid with light and observing return light from the tracer particles, tracer particles containing a flourescent substance are fed at least partially to the fluid and the fluid is irradiated with exciting light to cause the tracer particles to output flourescent emissions. A filter which does not transmit the exciting light is used to substantially selectively observe the flourecent emissions of the tracer particles. This method results in a remarkable improvement in the accuracy of flow velocity measurement or visualization of fluid distribution. Moreover, in a mixed fluid system consisting of two or more different fluids, the pattern of behavior of each fluid and the intermingled state of the fluids can be observed by using a plurality of different tracer particles.Type: ApplicationFiled: July 24, 2001Publication date: June 24, 2004Inventors: Akira Hirano, Masahide Tsujishita, Hisao Ohnishi, Masashi Nishigaki, Masamichi Ippommatsu, Tsuyoshi Tsurutani
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Publication number: 20020192534Abstract: The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium, osmium, rhodium or iridium, or an alloy containing the metal. The process for manufacture of the fuel electrode comprises coating an electrode material with a solution or dispersion of the high-melting metal and/or its chloride, sintering the same and finally reducing the product.Type: ApplicationFiled: July 23, 2002Publication date: December 19, 2002Applicant: Osaka Gas Company LimitedInventors: Masamichi Ipponmatsu, Minoru Suzuki, Hirokazu Sasaki, Shoji Otoshi, Hisao Ohnishi
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Patent number: 6432570Abstract: The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium, osmium, rhodium or iridium, or an alloy containing the metal. The process for manufacture of the fuel electrode comprises coating an electrode material with a solution or dispersion of the high-melting metal and/or its chloride, sintering the same and finally reducing the product.Type: GrantFiled: April 25, 2000Date of Patent: August 13, 2002Assignee: Osaka Gas Company LimitedInventors: Masamichi Ippommatsu, Minoru Suzuki, Hirokazu Sasaki, Shoji Otoshi, Hisao Ohnishi
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Patent number: 6306351Abstract: The present invention relates to a nitrogen oxide detecting element. Although there has been a demand for effecting detection of a nitrogen oxide by using a semiconductor type gas sensor, no semiconductor type sensors have existed which can detect the nitrogen oxide with good selectivity against other interfering gases (CO, H2) for an extended period of time with good durability. Then, by causing a gas detecting portion to include an oxide containing more than a predetermined amount of Bi and maintaining this gas detecting portion at a temperature range where its electron-conductivity is exhibited, it has become possible to detect the nitrogen oxide.Type: GrantFiled: January 4, 1999Date of Patent: October 23, 2001Assignee: Osaka Gas Co., Ltd.Inventors: Shuzo Kudo, Katsuki Higaki, Hisao Ohnishi
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Patent number: 6276217Abstract: In the method for measuring the velocity of fluid or visualizing the distribution of fluid by feeding tracer particles to the fluid, irradiating the fluid with light and observing return light from the tracer particles, tracer particles containing a fluorescent substance are fed at least partially to the fluid and the fluid is irradiated with exciting light to cause the tracer particles to output fluorescent emissions. A filter which does not transmit the exciting light is used to substantially selectively observe the fluorescent emissions of the tracer particles. This method results in a remarkable improvement in the accuracy of flow velocity measurement or visualization of fluid distribution. Moreover, in a mixed fluid system consisting of two or more different fluids, the pattern of behavior of each fluid and the intermingled state of the fluids can be observed by using a plurality of different tracer particles.Type: GrantFiled: November 9, 1999Date of Patent: August 21, 2001Assignees: Osaka Gas Company Limited, Liquid Gas Co., LtdInventors: Akira Hirano, Masahide Tsujishita, Hisao Ohnishi, Masashi Nishigaki, Masamichi Ippommatsu, Tsuyoshi Tsurutani
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Patent number: 6054232Abstract: The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium, osmium, rhodium or iridium, or an alloy containing the metal. The process for manufacture of the fuel electrode comprises coating an electrode material with a solution or dispersion of the high-melting metal and/or its chloride, sintering the same and finally reducing the product.Type: GrantFiled: November 12, 1996Date of Patent: April 25, 2000Assignee: Osaka Gas Company LimitedInventors: Masamichi Ippommatsu, Minoru Suzuki, Hirokazu Sasaki, Shoji Otoshi, Hisao Ohnishi
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Patent number: 5979245Abstract: In the method for measuring the velocity of fluid or visualizing the distribution of fluid by feeding tracer particles to the fluid, irradiating the fluid with light and observing return light from the tracer particles, tracer particles containing a fluorescent substance are fed at least partially to the fluid and the fluid is irradiated with exciting light to cause the tracer particles to output fluorescent emissions. A filter which does not transmit the exciting light is used to substantially selectively observe the fluorescent emissions of the tracer particles. This method results in a remarkable improvement in the accuracy of flow velocity measurement or visualization of fluid distribution. Moreover, in a mixed fluid system consisting of two or more different fluids, the pattern of behavior of each fluid and the intermingled state of the fluids can be observed by using a plurality of different tracer particles.Type: GrantFiled: August 14, 1996Date of Patent: November 9, 1999Assignees: Osaka Gas Company Limited, Liquid Gas Co., Ltd.Inventors: Akira Hirano, Masahide Tsujishita, Hisao Ohnishi, Masashi Nishigaki, Masamichi Ippommatsu, Tsuyoshi Tsurutani