Patents by Inventor Hisakazu SAKAI
Hisakazu SAKAI 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: 20200118766Abstract: A method for manufacturing a conductive polymer solid electrolytic capacitor comprising a conductive polymer introduction step and a solvent removal step. The conductive polymer introduction step comprises impregnating a porous material with a dispersion. The dispersion includes a conductive polymer dispersed in a non-aqueous solvent and the conductive polymer includes at least one of the structural units represented by the following formula and the following formula.Type: ApplicationFiled: May 28, 2018Publication date: April 16, 2020Applicant: SOKEN CHEMICAL & ENGINEERING Co., Ltd.Inventors: Takeshi MIYAMOTO, Hisakazu SAKAI
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Patent number: 10495368Abstract: A refrigerator includes: a compressor; an evaporator; a main condenser; a dew-prevention pipe; a bypass provided in parallel with a first channel from the main condenser to the dew-prevention pipe, and connected with the evaporator; a switching section provided on a downstream side of the main condenser, in which the switching section opens and closes the first channel, and a second channel from the main condenser to the bypass; and a control section. When defrosting the evaporator, the control section operates in such a manner that a refrigerant staying in the evaporator, the dew-prevention pipe, and the bypass is collected in the main condenser by closing the first channel and the second channel during an operation of the compressor, and thereafter, a high-pressure refrigerant collected in the main condenser is supplied to the evaporator through the bypass by stopping the compressor and opening the second channel.Type: GrantFiled: February 7, 2018Date of Patent: December 3, 2019Assignee: PANASONIC CORPORATIONInventors: Fuminori Takami, Hisakazu Sakai, Katsunori Horii, Yoshimasa Horio
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Patent number: 10443913Abstract: A refrigerator includes: (i) a compressor; (ii) a condenser; (iii) a decompressor; (iv) an evaporator; (v) a first pipe that connects the compressor, the condenser, the decompressor, and the evaporator, and that circulates a refrigerant therein; (vi) a second pipe that causes the refrigerant to circulate from the condenser to the evaporator; and (vii) a switching valve that switches flow of the refrigerant in the first pipe to the second pipe. A method for controlling the refrigerator includes: conducting a normal cooling operation in which a refrigerant is caused to circulate through a compressor, a condenser, decompressor, and an evaporator; and conducting a defrosting operation in which the refrigerant is caused to circulate through the compressor, the condenser, and the evaporator, excluding the decompressor.Type: GrantFiled: September 12, 2017Date of Patent: October 15, 2019Assignee: PANASONIC CORPORATIONInventors: Fuminori Takami, Terutsugu Segawa, Katsunori Horii, Hisakazu Sakai, Yoshimasa Horio
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Patent number: 10345028Abstract: A method for defrosting an evaporator, includes: (i) closing an outlet part that serves as a refrigerant outlet of the evaporator; (ii) closing an inlet part that serves as a refrigerant inlet of the evaporator; (iii) connecting the outlet part and the inlet part to one another; (iv) heating the evaporator. An evaporator, includes: an inlet part that serves as a refrigerant inlet; a first switching valve that is placed in the inlet part; an outlet part that serves as a refrigerant outlet; a second switching valve that is placed in the outlet part; a bypass pathway that connected the inlet part and the outlet part to one another; a horizontal pipe that is communicated with the inlet part; and a vertical pipe that connects the horizontal pipe and the outlet part to one another. A cooling apparatus can include the evaporator.Type: GrantFiled: May 24, 2017Date of Patent: July 9, 2019Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Fuminori Takami, Terutsugu Segawa, Katsunori Horii, Hisakazu Sakai, Yoshimasa Horio
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Patent number: 10329644Abstract: A Ta—Nb alloy powder which provides a capacitor having a higher capacitance than a Ta capacitor and a better thermal stability in terms of an oxide film than a Nb capacitor, the Ta—Nb alloy powder being a Ta—Nb alloy powder produced by a thermal CVD method, wherein a content of Nb is 1 to 50 mass %, and an average particle diameter of primary particles is 30 to 200 nm, preferably, a CV value per unit mass of the powder (?F·V/g) is 250 k?F·V/g or more, or further, a CV value per unit volume (?F·V/mm3) in terms of a molded body whose molding density ? (g/cm3) is ?c (g/cm3)=?0.012RNb+3.57, wherein RNb:Nb content (mass %) in an alloy, is 900 ?F·V/mm3 or more, and an anode element for a solid electrolytic capacitor using the alloy powder.Type: GrantFiled: September 11, 2014Date of Patent: June 25, 2019Assignee: ISHIHARA CHEMICAL CO., LTD.Inventors: Takayuki Maeshima, Issei Satoh, Hisakazu Sakai, Jun Furutani, Yoshihiko Takata, Tsukasa Kondo
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Publication number: 20180238603Abstract: A refrigerator includes: a compressor; an evaporator; a main condenser; a dew-prevention pipe; a bypass provided in parallel with a first channel from the main condenser to the dew-prevention pipe, and connected with the evaporator; a switching section provided on a downstream side of the main condenser, in which the switching section opens and closes the first channel, and a second channel from the main condenser to the bypass; and a control section. When defrosting the evaporator, the control section operates in such a manner that a refrigerant staying in the evaporator, the dew-prevention pipe, and the bypass is collected in the main condenser by closing the first channel and the second channel during an operation of the compressor, and thereafter, a high-pressure refrigerant collected in the main condenser is supplied to the evaporator through the bypass by stopping the compressor and opening the second channel.Type: ApplicationFiled: February 7, 2018Publication date: August 23, 2018Inventors: Fuminori TAKAMI, Hisakazu SAKAI, Katsunori HORII, Yoshimasa HORIO
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Publication number: 20180100678Abstract: A refrigerator includes: (i) a compressor; (ii) a condenser; (iii) a decompressor; (iv) an evaporator; (v) a first pipe that connects the compressor, the condenser, the decompressor, and the evaporator, and that circulates a refrigerant therein; (vi) a second pipe that causes the refrigerant to circulate from the condenser to the evaporator; and (vii) a switching valve that switches flow of the refrigerant in the first pipe to the second pipe. A method for controlling the refrigerator includes: conducting a normal cooling operation in which a refrigerant is caused to circulate through a compressor, a condenser, decompressor, and an evaporator; and conducting a defrosting operation in which the refrigerant is caused to circulate through the compressor, the condenser, and the evaporator, excluding the decompressor.Type: ApplicationFiled: September 12, 2017Publication date: April 12, 2018Inventors: FUMINORI TAKAMI, TERUTSUGU SEGAWA, KATSUNORI HORII, HISAKAZU SAKAI, YOSHIMASA HORIO
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Publication number: 20170363342Abstract: A method for defrosting an evaporator, includes: (i) closing an outlet part that serves as a refrigerant outlet of the evaporator; (ii) closing an inlet part that serves as a refrigerant inlet of the evaporator; (iii) connecting the outlet part and the inlet part to one another; (iv) heating the evaporator. An evaporator, includes: an inlet part that serves as a refrigerant inlet; a first switching valve that is placed in the inlet part; an outlet part that serves as a refrigerant outlet; a second switching valve that is placed in the outlet part; a bypass pathway that connected the inlet part and the outlet part to one another; a horizontal pipe that is communicated with the inlet part; and a vertical pipe that connects the horizontal pipe and the outlet part to one another. A cooling apparatus can include the evaporator.Type: ApplicationFiled: May 24, 2017Publication date: December 21, 2017Inventors: FUMINORI TAKAMI, TERUTSUGU SEGAWA, KATSUNORI HORII, HISAKAZU SAKAI, YOSHIMASA HORIO
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Publication number: 20170283916Abstract: A Ta-Nb alloy powder which has provides a capacitor having a higher capacitance than a Ta capacitor and a better thermal stability in terms of an oxide film is better than a Nb capacitor, the Ta-Nb alloy powder being a Ta-Nb alloy powder produced by a thermal CVD method, wherein a content of Nb is 1 to 50 mass %, and an average particle diameter of primary particles is 30 to 200 nm, preferably, a CV value per unit mass of the powder (?F·V/g) is 250 k?F·V/g or more, or further, a CV value per unit volume (?F·V/mm3) in terms of a molded body whose molding density ? (g/cm3) is ?c (g/cm3)=?0.012RNb+3.57, wherein RNb: Nb content (mass %) in an alloy, is 900 ?F·V/mm3 or more, and an anode element for a solid electrolytic capacitor using the alloy powder.Type: ApplicationFiled: September 11, 2014Publication date: October 5, 2017Applicant: ISHIHARA CHEMICAL CO., LTD.Inventors: Takayuki MAESHIMA, Issei SATOH, Hisakazu SAKAI, Jun FURUTANI, Yoshihiko TAKATA, Tsukasa KONDO
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Publication number: 20160104580Abstract: Method of producing Ta powder for tantalum solid electrolytic capacitor capable of stably providing CV value of more than 220 k and to provide the Ta powder and its Ta granulated powder. In method of producing Ta powder by vaporizing TaCl5 through heating and reducing with H2 gas, the reduction is performed under conditions that feeding rate of TaCl5 vapor passing through section area of reaction field of 1 cm2 for 1 minute is 0.05˜5.0 g/cm2·min and residence time of TaCl5 vapor in the reduction reaction field is 0.1˜5 seconds and reduction temperature of TaCl5 is 1100˜1600° C., whereby Ta powder including a single phase of ?-Ta of tetragonal system or mixed phase of ?-Ta and ?-Ta of cubic system and having average particle size of 30˜150 nm is obtained. Further, Ta granulated powder is obtained by granulating the Ta powder.Type: ApplicationFiled: June 13, 2013Publication date: April 14, 2016Inventors: Takayuki MAESHIMA, Yasunori YONEHANA, Hisakazu SAKAI, Jyun FURUTANI, Issei SATOH