Patents by Inventor Chihiro Nishikawa
Chihiro Nishikawa 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: 20230411719Abstract: A method for recovering a valuable substance from a lithium ion secondary battery is provided. The method includes a thermal treatment step of thermally treating a lithium ion secondary battery containing aluminum, carbon, and a copper foil as constituting materials, and a wet sorting step of applying an external force to a thermally treated product obtained in the thermal treatment step in the presence of a liquid, to sort the thermally treated product into a heavy product and a light product containing copper.Type: ApplicationFiled: September 7, 2021Publication date: December 21, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Ryoei WATANABE, Masataka YAMASHITA
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Publication number: 20230366061Abstract: A method for recovering a valuable substance is provided. The method includes a thermal treatment step of thermally treating a target containing a valuable substance using a continuous furnace configured to thermally treat the target while moving a target storing unit, in which the target is stored, such that the target storing unit is not contacted by a flame that is for thermal treatment, and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.Type: ApplicationFiled: September 7, 2021Publication date: November 16, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Ryoei WATANABE, Masataka YAMASHITA
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Publication number: 20230323506Abstract: A method for recovering a valuable substance is provided. The method includes a thermal treatment step of thermally treating a target, which contains a valuable substance and is stored in a target storing unit, via a flame blocking unit configured to block a flame for thermally treating the target such that the target storing unit is not contacted by the flame, and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.Type: ApplicationFiled: September 7, 2021Publication date: October 12, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Ryoei WATANABE, Masataka YAMASHITA, Youichi FUKUCHI, Tomotaka IZUMI, Yoshiki ITO
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Publication number: 20230318063Abstract: A method for recovering a valuable substance is provided. The method includes: a thermal treatment step of thermally treating a target containing a valuable substance while supporting a target storing unit, in which the target is stored, by a supporting unit that can support the target storing unit, wherein the thermally treating includes heating a gas present in a region, in which the supporting unit is positioned, by a flame for thermally treating the target such that the target storing unit is not contacted by the flame; and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.Type: ApplicationFiled: September 3, 2021Publication date: October 5, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Yoji SUGANUMA, Hiroki NAGAHARA, Minoru YOSHIHARA, Chihiro NISHIKAWA, Ryoei WATANABE, Yoshihiro HONMA, Masataka YAMASHITA
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Publication number: 20230132244Abstract: Provided are a face shield that can easily be combined and used with various masks and a mask-equipped face shield. A face shield 1-1 is the face shield 1-1 that is attachable/detachable to/from a mask 2, and covers at least an eye of a face of a user who wears the mask 2. The face shield 1-1 is made of a film 101-1 having flexibility and translucency. At least a pair of cut lines 102L and 102R through which straps 202 of the mask 2 can be inserted are formed in both left and right parts of the face shield 1-1. The cut lines 102 have engagement parts 102a and 102b to be engaged with the straps 202 inserted through the cut lines 102.Type: ApplicationFiled: April 23, 2021Publication date: April 27, 2023Applicant: DEXERIALS CORPORATIONInventors: Shinya SUZUKI, Chihiro NISHIKAWA
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Publication number: 20230119544Abstract: Provided is a method for concentrating a valuable metal contained in a lithium ion secondary battery, for processing a lithium ion secondary battery containing at least one element selected from the group consisting of cobalt and nickel, or a positive electrode material of the lithium ion secondary battery, to concentrate a valuable metal containing either or both of cobalt and nickel. The method includes a thermal treatment step of thermally treating the lithium ion secondary battery or the positive electrode material thereof, to form a granular aggregate containing at least one valuable metal selected from the group consisting of cobalt and nickel.Type: ApplicationFiled: March 1, 2021Publication date: April 20, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Ryoei WATANABE, Yoshihiro HONMA, Chihiro NISHIKAWA, Masataka YAMASHITA, Jiahao LIU
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Publication number: 20230107938Abstract: A method for recovering valuable substance, for recovering it from lithium ion secondary battery includes: thermal treatment step of thermally treating lithium ion secondary battery to obtain thermally treated product; pulverizing/classifying step of classifying pulverized product obtained by pulverizing thermally treated product, to obtain coarse and fine-grained products both containing valuable substance; water leaching step of immersing fine-grained product in water, to obtain water-leached slurry; wet magnetic sorting step of subjecting water-leached slurry to wet magnetic sorting, to sort water-leached slurry into magnetically attractable materials and non-magnetically attractable material slurry; and acid leaching step of adding acidic solution to either or both of non-magnetically attractable material slurry recovered by wet magnetic sorting and non-magnetically attractable materials obtained by solid-liquid separation of non-magnetically attractable material slurry to leach non-magnetically attractabType: ApplicationFiled: March 9, 2021Publication date: April 6, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Ryoei WATANABE, Masataka YAMASHITA
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Publication number: 20230104457Abstract: Provided is a method for recovering lithium, for recovering lithium from a lithium ion secondary battery, the method including: a thermal treatment step of thermally treating a lithium ion secondary battery having a residual voltage higher than or equal to 80% of a rated voltage, to obtain a thermally treated product; a pulverizing step of pulverizing the thermally treated product, to obtain a pulverized product; and a lithium recovering step of recovering lithium from the pulverized product.Type: ApplicationFiled: March 9, 2021Publication date: April 6, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Ryoei WATANABE, Masataka YAMASHITA, Yoshiki ITO, Yoshitaka YOSHIWARA
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Publication number: 20230083016Abstract: Provided is a sorting method for valuable resources, including a thermal treatment step of thermally treating a target containing valuable resources, to melt aluminum and separate a melt, a pulverizing step of pulverizing a thermally treated product remaining after the melt is separated, to obtain a pulverized product, a magnetic sorting step of sorting the valuable resources from the pulverized product by a magnetic force, and a wind force sorting step of sorting one valuable resource from another valuable resource in the valuable resources by a wind force.Type: ApplicationFiled: January 29, 2021Publication date: March 16, 2023Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Tatsuya YODOSE, Ryoei WATANABE, Hitoshi SASAKI, Chihiro NISHIKAWA, Yoshihiro HONMA
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Publication number: 20220396852Abstract: Provided is a method for separating lithium from a lithium solution containing lithium by 200 mg/L or more and fluorine by 20 mg/L or more, the method including: a first removal step of adding a first component, which solidifies the fluorine contained in the lithium solution, to the lithium solution and removing the fluorine solidified to obtain a F-removed liquid; and a second removal step of adding a second component, which solidifies the first component remaining in the F-removed liquid, to the F-removed liquid and removing the first component solidified to obtain a first component-removed liquid.Type: ApplicationFiled: September 10, 2020Publication date: December 15, 2022Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Ryoei WATANABE
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Patent number: 11482737Abstract: There is provided a means capable of recovering a valuable material such as cobalt and nickel, with a low grade of a metal derived from a negative electrode current collector, a low grade of fluorine, and a low grade of a material derived from a negative electrode active material. A method for recovering a valuable material from a lithium ion secondary battery, is characterized in that it includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a classification step of classifying a crushed object obtained through the crushing step into a coarse particle product and a fine particle product; and a wet magnetic separation step of performing wet magnetic separation on the fine particle product obtained through the classification step.Type: GrantFiled: January 3, 2020Date of Patent: October 25, 2022Assignee: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro Nishikawa, Yoshihiro Honma, Norio Nakajima
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Publication number: 20210210807Abstract: A method for recovering a valuable material from a lithium ion secondary battery includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a first stage of classification step of classifying a crushed object obtained through the crushing step based on a classification point of 1.2 to 2.4 mm, and a second stage of classification step of classifying an intermediate product and a fine particle product obtained on a fine side in the first stage of classification step based on a classification point of 0.3 mm or less; and a dry magnetic separation step of repeating one time or more a step of performing dry magnetic separation on an intermediate product obtained on a coarse side in the second stage of classification step and performing dry magnetic separation again.Type: ApplicationFiled: January 3, 2020Publication date: July 8, 2021Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Norio NAKAJIMA
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Publication number: 20210210806Abstract: There is provided a means capable of recovering a valuable material such as cobalt and nickel, with a low grade of a metal derived from a negative electrode current collector, a low grade of fluorine, and a low grade of a material derived from a negative electrode active material. A method for recovering a valuable material from a lithium ion secondary battery, is characterized in that it includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a classification step of classifying a crushed object obtained through the crushing step into a coarse particle product and a fine particle product; and a wet magnetic separation step of performing wet magnetic separation on the fine particle product obtained through the classification step.Type: ApplicationFiled: January 3, 2020Publication date: July 8, 2021Applicant: DOWA ECO-SYSTEM CO., LTD.Inventors: Chihiro NISHIKAWA, Yoshihiro HONMA, Norio NAKAJIMA
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Patent number: 7392780Abstract: A pulsating oil pressure reducing device 40 for an internal combustion engine has an oil chamber 41 for reducing pulsating oil pressure in a discharge passage 30 for carrying oil discharged from an oil pump 20. The oil chamber 41 communicates with the discharge passage 30 by way of a connecting port 41a1 and makes the oil stagnate therein. The oil chamber 41 is connected to the discharge passage 30 by an air vent passage 45 through which air is discharged from the oil chamber 41 into the discharge passage 30. The air vent passage 45 has an inlet port 45a opening into a top part 41a of the oil chamber 41 and a discharge port 45b opening into the oil passage 30 at a level above the inlet port 45a. Since the pulsating oil pressure reducing device 40 having the air vent passage separately from the connecting port, air can be efficiently discharged from the oil chamber and the degree of freedom of placement of the oil passage and the oil chamber is increased.Type: GrantFiled: March 13, 2007Date of Patent: July 1, 2008Assignee: Honda Motor Co., Ltd.Inventors: Tatsunori Tsuruta, Noriaki Kawai, Chihiro Nishikawa, Nobuharu Takahashi
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Patent number: 7377252Abstract: An internal combustion engine is provided with an oil filter 10 through which lubricant oil having pulsating pressure passes. The oil filter 10 has an oil filter body 11 attached to a filter base 20, and a cover 30 formed integrally with the filter base 20 and circumferentially surrounding the oil filter body 11. The cover 30 is provided with a window part 36 through which a space 35 formed between the oil filter body 11 and the cover 30 opens outward. The cover 30 has a circumferentially endless annular end wall 33 provided between the window part 36 and an end wall 33a. The cover 30 has a reinforcing member 41 provided with an opening part 46 and attached to the outside surface of the cover 30 so that the opening part 46 coincides with the window part 36 of the cover 30. The oil filter 10 can be properly cooled and sounds radiated by the oil filter 10 and the cover 30 can be reduced.Type: GrantFiled: March 29, 2007Date of Patent: May 27, 2008Assignee: Honda Motor Co., Ltd.Inventors: Tatsunori Tsuruta, Noriaki Kawai, Chihiro Nishikawa, Akihiro Konishi
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Publication number: 20070227476Abstract: A pulsating oil pressure reducing device 40 for an internal combustion engine has an oil chamber 41 for reducing pulsating oil pressure in a discharge passage 30 for carrying oil discharged from an oil pump 20. The oil chamber 41 communicates with the discharge passage 30 by way of a connecting port 41a1 and makes the oil stagnate therein. The oil chamber 41 is connected to the discharge passage 30 by an air vent passage 45 through which air is discharged from the oil chamber 41 into the discharge passage 30. The air vent passage 45 has an inlet port 45a opening into a top part 41a of the oil chamber 41 and a discharge port 45b opening into the oil passage 30 at a level above the inlet port 45a. Since the pulsating oil pressure reducing device 40 having the air vent passage separately from the connecting port, air can be efficiently discharged from the oil chamber and the degree of freedom of placement of the oil passage and the oil chamber is increased.Type: ApplicationFiled: March 13, 2007Publication date: October 4, 2007Inventors: Tatsunori Tsuruta, Noriaki Kawai, Chihiro Nishikawa, Nobuharu Takahashi
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Publication number: 20070227490Abstract: An internal combustion engine is provided with an oil filter 10 through which lubricant oil having pulsating pressure passes. The oil filter 10 has an oil filter body 11 attached to a filter base 20, and a cover 30 formed integrally with the filter base 20 and circumferentially surrounding the oil filter body 11. The cover 30 is provided with a window part 36 through which a space 35 formed between the oil filter body 11 and the cover 30 opens outward. The cover 30 has a circumferentially endless annular end wall 33 provided between the window part 36 and an end wall 33a. The cover 30 has a reinforcing member 41 provided with an opening part 46 and attached to the outside surface of the cover 30 so that the opening part 46 coincides with the window part 36 of the cover 30. The oil filter 10 can be properly cooled and sounds radiated by the oil filter 10 and the cover 30 can be reduced.Type: ApplicationFiled: March 29, 2007Publication date: October 4, 2007Inventors: Tatsunori Tsuruta, Noriaki Kawai, Chihiro Nishikawa, Akihiro Konishi
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Patent number: 5796206Abstract: A method for controlling a piezoelectric actuator includes: a safety range setting process in which a safety range V.sub.range1 or V.sub.range2 of an applied voltage is set so that an area of 180.degree. domain rotation is within one third or less of an area of full 180.degree. domain rotation S.sub.1 or S.sub.2 in a positive or negative region of the applied voltage; and a driving process in which the voltage is applied to the piezoelectric actuator with a limitation of the safety range V.sub.range1 or V.sub.range2. A controller which drives a piezoelectric actuator according to the controlling method is also provided. A temperature compensation is applied if necessary. The 180.degree. domain rotation is limited by the lower or upper limit of the safety range, so that local concentration of inner stress is suppressed and the actuator is driven at its maximum ability without cracks or splits.Type: GrantFiled: October 2, 1996Date of Patent: August 18, 1998Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki KaishaInventors: Mitsuru Asai, Nobuo Kamiya, Tomoji Ishikawa, Chihiro Nishikawa
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Patent number: D974666Type: GrantFiled: November 24, 2020Date of Patent: January 3, 2023Assignee: DEXERIALS CORPORATIONInventors: Shinya Suzuki, Chihiro Nishikawa