Patents by Inventor Kazuki Takeno
Kazuki Takeno 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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Patent number: 11769904Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly and an electrolyte solution. The electrode assembly is impregnated with at least part of the electrolyte solution. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The separator separates the positive electrode and the negative electrode from each other. The negative electrode includes a negative electrode active material. The negative electrode active material includes graphite. The following relation of a formula (1) is satisfied: “1.60?NPR/AAR?2.55”. “NPR” represents a ratio of a negative electrode charging capacity to a positive electrode charging capacity. “AAR” represents a ratio of an effective discharging capacity of the negative electrode to a total of a capacity corresponding to an amount of inactive lithium adhered to the negative electrode and the effective discharging capacity of the negative electrode.Type: GrantFiled: July 12, 2021Date of Patent: September 26, 2023Assignee: Prime Planet Energy & Solutions, Inc.Inventors: Tetsuya Okado, Hirofusa Tanaka, Masashi Muraoka, Kazuki Takeno, Mio Nosaka
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Publication number: 20220344722Abstract: A nonaqueous electrolyte secondary battery includes an exterior package, an electrode assembly, and an electrolyte solution. In a cross section orthogonal to a winding axis of the laminated assembly, the electrode assembly has a contour line having a corner-rounded rectangular shape. The contour line consists of a first arc-shaped portion, a straight line portion, and a second arc-shaped portion. The contour line has a height ratio (R1=H0/H1) of 1.20 to 1.35. H0 represents a distance between two points most distant from each other on the contour line. H1 represents an average length of the two line segments. The separator includes a first main surface and a second main surface. The first main surface is in contact with the negative electrode plate. A first dynamic coefficient of friction between the first main surface and the negative electrode plate is 0.52 to 0.66.Type: ApplicationFiled: April 25, 2022Publication date: October 27, 2022Inventors: Masashi MURAOKA, Kazuki TAKENO
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Publication number: 20220320671Abstract: Each prismatic cell is provided with a rolled electrode assembly, and the rolled electrode assembly has a flat section with a flat outer peripheral surface and two curved sections with a curved outer peripheral surface. Each spacer has a substrate and multiple ribs protruding on at least one side of the substrate, and the ribs are formed so as to face the flat section of the rolled electrode assembly and extend in a direction substantially perpendicular to the rolling axis of the rolled electrode assembly. The ribs have a length of 60 to 100 when the height of the flat section of the rolled electrode assembly is represented by 100, and the relationship 2?B/A?10 is satisfied where A is the width of the ribs and B is the distance between adjoining ribs.Type: ApplicationFiled: September 11, 2020Publication date: October 6, 2022Inventors: Yuji OGISHIMA, Keisuke MINAMI, Kazuki TAKENO
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Publication number: 20220052373Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly and an electrolyte solution. The electrode assembly is impregnated with at least part of the electrolyte solution. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The separator separates the positive electrode and the negative electrode from each other. The negative electrode includes a negative electrode active material. The negative electrode active material includes graphite. The following relation of a formula (1) is satisfied: “1.60?NPR/AAR?2.55”. “NPR” represents a ratio of a negative electrode charging capacity to a positive electrode charging capacity. “AAR” represents a ratio of an effective discharging capacity of the negative electrode to a total of a capacity corresponding to an amount of inactive lithium adhered to the negative electrode and the effective discharging capacity of the negative electrode.Type: ApplicationFiled: July 12, 2021Publication date: February 17, 2022Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Tetsuya OKADA, Hirofusa TANAKA, Masashi MURAOKA, Kazuki TAKENO, Mio NOSAKA
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Patent number: 10964923Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The prismatic secondary battery is arranged such that the sealing plate extends in the vertical direction during use of the prismatic secondary battery. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.Type: GrantFiled: May 29, 2018Date of Patent: March 30, 2021Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada
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Patent number: 10957883Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.Type: GrantFiled: May 29, 2018Date of Patent: March 23, 2021Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada
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Publication number: 20190288290Abstract: A non-aqueous electrolyte secondary battery of one example according to an embodiment has an output of 1,000 W or more. An electrode body includes a protective layer which contains an insulating inorganic compound and which is provided on at least one surface of a positive electrode, a negative electrode, and a separator, and has a heat capacity per unit battery capacity of 16 J/K·Ah or more. The positive electrode has a surface resistance of 0.5 to 40?.Type: ApplicationFiled: January 23, 2019Publication date: September 19, 2019Applicant: SANYO Electric Co., Ltd.Inventors: Keisuke Minami, Kazuki Takeno, Toyoki Fujihara, Takuya Tamagawa
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Publication number: 20180351140Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.Type: ApplicationFiled: May 29, 2018Publication date: December 6, 2018Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada
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Publication number: 20180351139Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The prismatic secondary battery is arranged such that the sealing plate extends in the vertical direction during use of the prismatic secondary battery. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.Type: ApplicationFiled: May 29, 2018Publication date: December 6, 2018Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada
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Patent number: 8348639Abstract: A high performance sealing device having an excellent pressure resistance and realizing a prevention of damage. The sealing device usable at a working pressure of 0 to 2 MPa, and not damaged even if the pressure of high-pressure fuel of 5 MPa or higher is applied thereto, wherein high pressure fuel on the high pressure side is sealed by a first seal part, oil from a cam side on a low pressure side is sealed by a second seal part, and the fuel slightly leaked due to failure of scraping at the first seal part is sealed by the second seal part to form a dual seal structure. A resin ring coming into slidable sealing contact with a shaft is used in the first seal part, whereby abnormal abrasion does not occur even when fuel having less lubricity is used, and the durability of the seal is increased.Type: GrantFiled: March 28, 2007Date of Patent: January 8, 2013Assignee: NOK CorporationInventors: Masatoshi Okada, Iwao Taira, Tadashi Abiko, Yosuke Kondo, Kazuki Takeno, Ichiro Yamane
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Patent number: 7938406Abstract: A first gasket 10 is placed in a groove formed in a cam cover and seals a gap between a cylinder head and the cam cover. The first gasket 10 includes a pair of seal lips 13 which come into tight contact with the cylinder head and which are provided in parallel to each other, and a plurality of connecting portions 15 which are provided between the pair of seal lips 13, which are connected to each of the seal lips 13, and which hold a distance between the seal lips 13 near the connected portion.Type: GrantFiled: July 5, 2006Date of Patent: May 10, 2011Assignee: NOK CorporationInventors: Tomohisa Matsumoto, Takashi Nakao, Shuji Yoshitsune, Kazuki Takeno
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Patent number: 7918463Abstract: A reciprocating seal used, for example, for a shock absorber. A main seal lip has a two-step lip structure including a first lip and a second lip and a plurality of protrusions extending in the direction of the shaft are formed on a sliding contact surface of the second lip, thereby improving frictional force characteristics and, at the same time, improving sealing performance.Type: GrantFiled: September 3, 2008Date of Patent: April 5, 2011Assignee: Nok CorporationInventors: Hidenori Arai, Kazuki Takeno, Ichiro Yamane, Shinobu Munekata, Katsumi Yamashina, Masaru Watanabe
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Patent number: 7789396Abstract: This invention provides an oil seal that can maintain an excellent friction reduction function over a long period of time, has excellent abrasion resistance, and further has excellent sealing properties. The oil seal comprises a seal lip (4) formed of a rubber-like elastic material comprising a lip edge part (9) and an air-side slope (8) and a sealing fluid-side slope (10) provided on both sides of the lip edge part (9). The air-side slope (8) has a coating film (14) on its surface. In the lip edge part (9) in its portion in contact with a shaft (13), a sealing fluid-side rubber part (2?) and an air-side coating film (14) are simultaneously brought into contact with the shaft (13). The coating film (14) is preferably formed of a coating agent comprising a fluororesin, a polyethylene resin, an isocyanate-modified polybutadiene resin, and a solvent.Type: GrantFiled: December 14, 2005Date of Patent: September 7, 2010Assignee: NOK CorporationInventors: Kazuki Takeno, Hideyuki Huruyama, Masayuki Tanida, Hiroki Matsui, Tatsuhiko Watanabe, Shinobu Munekata, Akira Yamaguchi, Hirotaka Mizuta, Kenichi Kunieda, Toshihiro Higashira
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Publication number: 20090200750Abstract: To maintain an excellent friction reducing function over a long period of time, with having excellent abrasion resistance and excellent sealing properties, the oil seal has a seal lip (4) made of a rubber-like elastic material and provided with an air-side slope (8) and a sealing fluid-side slope (10) on both sides of the lip edge part (9), the air-side slope (8) has a coating film (14) on its surface, a portion in contact with a shaft (13) in the lip edge part (9) is so made that a sealing fluid-side rubber part (2?) and an air-side coating film (14) simultaneously contact with the shaft (13), and the coating film (14) is preferably formed of a coating agent comprising a fluororesin, a polyethylene resin, an isocyanate-modified polybutadiene resin, and a solvent.Type: ApplicationFiled: December 14, 2005Publication date: August 13, 2009Applicant: NOK CORPORATIONInventors: Kazuki Takeno, Hideyuki Huruyama, Masayuki Tanida, Hiroki Matsui, Tatsuhiko Watanabe, Shinobu Munekata, Akira Yamaguchi, Hirotaka Mizuta, Kenichi Kunieda, Toshihiro Higashira
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Publication number: 20090134586Abstract: The present invention relates to a reciprocating seal used, for example, for a shock absorber. A main seal lip 32 has a two-step lip structure including a first lip 32a and a second lip 32b and a plurality of protrusions 34 extending in the direction of the shaft are formed on a sliding contact surface of the second lip 32b, thereby improving frictional force characteristics and, at the same time, improving sealing performance.Type: ApplicationFiled: September 3, 2008Publication date: May 28, 2009Inventors: Hidenori Arai, Kazuki Takeno, Ichiro Yamane, Shinobu Munekata, Katsumi Yamashina, Masaru Watanabe
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Publication number: 20090115138Abstract: A first gasket 10 is placed in a groove formed in a cam cover and seals a gap between a cylinder head and the cam cover. The first gasket 10 includes a pair of seal lips 13 which come into tight contact with the cylinder head and which are provided in parallel to each other, and a plurality of connecting portions 15 which are provided between the pair of seal lips 13, which are connected to each of the seal lips 13, and which hold a distance between the seal lips 13 near the connected portion.Type: ApplicationFiled: July 5, 2006Publication date: May 7, 2009Applicant: NOK CorporationInventors: Tomohisa Matsumoto, Takashi Nakao, Shuji Yoshitsune, Kazuki Takeno
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Publication number: 20080258405Abstract: A high performance sealing device having an excellent pressure resistance and realizing a prevention of damage. The sealing device usable at a working pressure of 0 to 2 MPa, and not damaged. even if the pressure of high-pressure fuel of 5 MPa or higher is applied thereto, wherein high pressure fuel on the high pressure side H is sealed by a first seal part 2, oil from a cam side on a low pressure side L is sealed by a second seal part 3, and the fuel slightly leaked due to failure of scraping at the first seal part is sealed by the second seal part to form a dual seal structure, and a resin ring 21 coming into slidable sealing contact with a shaft 10 is used in the first seal part 2, whereby abnormal abrasion does not occur even when fuel having less lubricity is used, and the durability of the seal is increased.Type: ApplicationFiled: April 1, 2008Publication date: October 23, 2008Inventors: Masatoshi Okada, Iwao Taira, Tadashi Abiko, Yosuke Kondo, Kazuki Takeno, Ichiro Yamane
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Publication number: 20070182103Abstract: A high performance sealing device having an excellent pressure resistance and realizing a prevention of damage. The sealing device usable at a working pressure of 0 to 2 MPa, and not damaged even if the pressure of high-pressure fuel of 5 MPa or higher is applied thereto, wherein high pressure fuel on the high pressure side H is sealed by a first seal part 2, oil from a cam side on a low pressure side L is sealed by a second seal part 3, and the fuel slightly leaked due to failure of scraping at the first seal part is sealed by the second seal part to form a dual seal structure, and a resin ring 21 coming into slidable sealing contact with a shaft 10 is used in the first seal part 2, whereby abnormal abrasion does not occur even when fuel having less lubricity is used, and the durability of the seal is increased.Type: ApplicationFiled: March 28, 2007Publication date: August 9, 2007Inventors: Masatoshi Okada, Iwao Taira, Tadashi Abiko, Yosuke Kondo, Kazuki Takeno, Ichiro Yamane
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Publication number: 20070169621Abstract: A high performance sealing device having an excellent pressure resistance and realizing a prevention of damage. The sealing device usable at a working pressure of 0 to 2 MPa, and not damaged even if the pressure of high-pressure fuel of 5 MPa or higher is applied thereto, wherein high pressure fuel on the high pressure side H is sealed by a first seal part 2, oil from a cam side on a low pressure side L is sealed by a second seal part 3, and the fuel slightly leaked due to failure of scraping at the first seal part is sealed by the second seal part to form a dual seal structure, and a resin ring 21 coming into slidable sealing contact with a shaft 10 is used in the first seal part 2, whereby abnormal abrasion does not occur even when fuel having less lubricity is used, and the durability of the seal is increased.Type: ApplicationFiled: March 28, 2007Publication date: July 26, 2007Inventors: Masatoshi Okada, Iwao Taira, Tadashi Abiko, Yosuke Kondo, Kazuki Takeno, Ichiro Yamane
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Publication number: 20060138729Abstract: The present invention relates to a reciprocating seal used, for example, for a shock absorber. A main seal lip 32 has a two-step lip structure including a first lip 32a and a second lip 32b and a plurality of protrusions 34 extending in the direction of the shaft are formed on sliding contact surface of the second lip 32b, thereby improving frictional force characteristics and, at the same time, improving sealing performance.Type: ApplicationFiled: September 19, 2003Publication date: June 29, 2006Inventors: Hidenori Arai, Kazuki Takeno, Ichiro Yamane, Shinobu Munekata, Katsumi Yamashina