Patents by Inventor Hirokazu Kimiya
Hirokazu Kimiya 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: 20190292686Abstract: An electrospinning apparatus for depositing fibers on a target having first and second surfaces opposed to each other. The apparatus includes a discharger that discharges a material solution of the fibers towards the first surface of the target, a collector electrode containing a top portion opposed to the discharger, a holder that holds the target between the discharger and the collector electrode so that the first surface of the target is opposed to the discharger, a power supply, a shift regulator that shifts the holder in a direction parallel to the first surface of the target, a distance regulator that regulates a target distance between the top portion of the collector electrode and the second surface of the target, and a controller that controls the shift regulator and the distance regulator to produce a fiber assembly having a given deposited condition on the first surface of the target.Type: ApplicationFiled: March 19, 2019Publication date: September 26, 2019Inventors: Hirokazu KIMIYA, Keiji FUJIWARA, Hiroto SUMIDA
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Publication number: 20180360701Abstract: Provided is a stacked body including: a fiber substrate layer that contains first fibers; and a fiber assembly that is stacked on the fiber substrate layer, wherein the fiber assembly includes: second fibers that contain a water-soluble first component as a main component and particulates that contain a second component that is capable of forming a hydrogel, and in a case where the second fibers contain the second component, a mass proportion of the second component contained in the particulates is greater than a mass proportion of the second component contained in the second fibers, and an average fiber diameter D1 of the first fibers and an average fiber diameter D2 of the second fibers satisfy the relationship: D1>D2. With the stacked body, embedment of the particulates into the fiber substrate layer is suppressed, and a large number of particulates can be laid in an exposed state.Type: ApplicationFiled: May 23, 2018Publication date: December 20, 2018Inventor: Hirokazu KIMIYA
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Publication number: 20180362765Abstract: To easily manufacture a fiber assembly that includes fibers and particulates supported by the fibers, provided is a method for manufacturing a fiber assembly including: a preparation step of preparing a raw material liquid that contains a water-soluble first component, a second component that is capable of forming a hydrogel, and water; and an electrospinning step of forming fibers that contain the first component as a main component and particulates that are supported by a plurality of the fibers and contain the second component from the raw material liquid by an electrospinning method, wherein in a case where the fibers contain the second component, a mass proportion of the second component contained in the particulates is greater than a mass proportion of the second component contained in the fibers.Type: ApplicationFiled: May 23, 2018Publication date: December 20, 2018Inventors: Hirokazu KIMIYA, Tomoko KAWASHIMA
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Publication number: 20160362311Abstract: The method includes: preparing a liquid having a pH of 9 or more; and generating plasma in or near the liquid to generate a plasma-treated liquid having a pH of 9 or more.Type: ApplicationFiled: June 2, 2016Publication date: December 15, 2016Inventors: HIROKAZU KIMIYA, SHIN-ICHI IMAI
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Publication number: 20160362317Abstract: The method includes: preparing a plasma-treated liquid having a pH of 6 or more and 9 or less, the plasma-treated liquid being a liquid that has been treated with plasma generated in or near the liquid; and changing the pH of the plasma-treated liquid to less than 6 or to higher than 9.Type: ApplicationFiled: June 2, 2016Publication date: December 15, 2016Inventors: HIROKAZU KIMIYA, SHIN-ICHI IMAI
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Publication number: 20050074666Abstract: The heat control device for a battery of the present invention contains i) a radiator for dissipating heat that has generated in a battery through a charging and discharging process; and ii) a heat controller that transforms its shape by heat. The structure can protect a battery from anomalous overheating. On the other hand, when the temperature of the battery falls down, the device protects the battery not only from over-dissipating, but also from degradation in output power characteristics of the battery.Type: ApplicationFiled: July 31, 2003Publication date: April 7, 2005Inventors: Hirokazu Kimiya, Kenichi Morigaki, Kozo Watanabe
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Publication number: 20050026036Abstract: A battery has an electrode with a mixture layer including electroactive material formed on a current collector whose exposed part is welded to a lead, and also a separator that shrinks with heat. In the battery, a heat shrinkage-preventing layer is provided on a portion of the separator that faces the lead. As a result, even if a minor short-circuit occurs and a large amount of current is flown to a minor short-circuit region, the heat shrinkage-preventing layer prevents expansion of a short-circuit area resulting from heat shrinkage of the separator. Thus, a conspicuous decrease in battery properties is prevented.Type: ApplicationFiled: July 21, 2004Publication date: February 3, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Hirokazu Kimiya, Shinji Kasamatsu, Hajime Nishino, Kazuhiro Okamura, Mikinari Shimada
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Patent number: 6338917Abstract: A nickel positive electrode including an active material mixture mainly composed of a nickel oxide and an electrically conductive support, a metal and/or an oxide thereof including elements effective for increasing oxygen overvoltage, preferably at least one element selected from Ca, Ti, Nb, Cr, Y and Yb is contained in a conducting agent such as metallic Co and/or Co oxide added to supplement the electrical conductivity of the active material. By virtue of this construction, the decrease of charging efficiency caused by increase of battery temperature and decrease of the oxygen overvoltage with charging of the battery can be inhibited and the charging efficiency can be improved in a wide temperature atmosphere. Thus, a nickel-metal hydride storage battery of high capacity can be provided.Type: GrantFiled: December 1, 1998Date of Patent: January 15, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akihiro Maeda, Hirokazu Kimiya, Yoshio Moriwaki, Isao Matsumoto
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Patent number: 6284215Abstract: A process for producing positive electrode active material includes feeding an aqueous nickel salt solution, aqueous solutions of different kinds of metals, aqueous solution containing ammonium ions and aqueous alkali solution each independently and simultaneously into a reaction vessel such that the amount of alkali metal is 1.9-2.3 moles relative to 1 mole of the total amount of nickel and different kinds of metals and the amount of ammonium ions is 2 moles or more relative to 1 mole of the total amount of nickel and different kinds of metals, the pH in the vessel is 11-13, the temperature in the vessel is 30-60° C. and the average residence time is 20-50 hours.Type: GrantFiled: April 27, 2000Date of Patent: September 4, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Sakamoto, Hidekatsu Izumi, Hirokazu Kimiya, Yoichi Izumi, Isao Matsumoto
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Patent number: 6261720Abstract: Disclosed is a high capacity positive active material for an alkaline storage battery comprising a nickel based multi-metals oxide, wherein the charge characteristic at high temperature is improved. This oxide has a large number of micropores in at least a surface layer. An average composition of the surface layer is different from that of the interior in that at least one element selected from the group consisting of Ca, Ti, Zn, Sr, Ba, Y, Cd, Co, Cr, Bi and lanthanoids, in addition to Ni, is contained in the surface layer, or in that the at least one element is contained at a concentration higher than that of the interior.Type: GrantFiled: July 3, 1997Date of Patent: July 17, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hirokazu Kimiya, Yoichi Izumi, Hiroyuki Sakamoto, Hidekatsu Izumi, Isao Matsumoto
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Patent number: 6183909Abstract: A high energy density alkaline storage battery which uses a positive electrode including mainly nickel oxide is provided by increasing the capacities of the positive electrode and negative electrode. For increasing the capacity density of the positive electrode, the active material is incorporated as a solid solution with at least one element selected from manganese, chromium, aluminum and calcium in the range of from not less than 3 mol % to not more than 15 mol % relative to the active material, and the surface and/or the neighborhood of the surface of the active material are coated with a cobalt oxyhydroxide having a high electric conductivity of a specific resistance of 15 &OHgr;·cm or less and a low crystallinity.Type: GrantFiled: May 1, 1998Date of Patent: February 6, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akihiro Maeda, Hirokazu Kimiya, Yoshio Moriwaki, Isao Matsumoto
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Patent number: 6129902Abstract: A process for producing positive electrode active material includes feeding an aqueous nickel salt solution, aqueous solutions of different kinds of metals, aqueous solution containing ammonium ions and aqueous alkali solution each independently and simultaneously into a reaction vessel such that the amount of alkali metal is 1.9-2.3 moles relative to 1 mole of the total amount of nickel and different kinds of metals and the amount of ammonium ions is 2 moles or more relative to 1 mole of the total amount of nickel and different kinds of metals, the pH in the vessel is 11-13, the temperature in the vessel is 30-60.degree. C. and the average residence time is 20-50 hours.Type: GrantFiled: February 2, 1998Date of Patent: October 10, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Sakamoto, Hidekatsu Izumi, Hirokazu Kimiya, Yoichi Izumi, Isao Matsumoto
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Patent number: 6042753Abstract: Active materials for positive electrodes in alkaline storage batteries excellent in capacity density, discharge voltage, and high rate discharge characteristics can be provided by coating the surface of the active material powder with an .alpha.-like Al-substituted Ni(OH).sub.2. Moreover, active materials excellent in capacity density, discharge voltage and high rate discharge characteristics, and besides in high-temperature charging efficiency and/or charge and discharge characteristics can be provided by dissolving in solid state and/or coprecipitated state at least one different metal element selected from Ca, Cr, Y, Ti and Co in the .alpha.-like Al-substituted Ni(OH).sub.2 layer. Furthermore, active materials excellent in capacity density, discharge voltage and high rate discharge characteristics, and besides in charge and discharge characteristics can be provided by coating with a Co oxide the surface of the active material powder coated with the .alpha.-like Al-substituted Ni(OH).sub.2.Type: GrantFiled: October 2, 1998Date of Patent: March 28, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hidekatsu Izumi, Hiroyuki Sakamoto, Hirokazu Kimiya, Yoichi Izumi, Isao Matsumoto
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Patent number: 6030725Abstract: The present invention provides alkaline storage batteries of which high-rate discharge characteristic at low-temperature, cycle life, and storage performance at high-temperature are improved in good balance and the cost performance is superior even when the content of cobalt is made extremely low by using in the negative electrode consisting of hydrogen absorbing alloy powders based on MmNi system alloys comprising MmNi.sub.5 system alloy which remains mostly crystalline in phase when absorbing hydrogen and Mm.sub.2 Ni.sub.7 system alloy which turns mostly amorphous in phase upon absorbing hydrogen.Type: GrantFiled: March 25, 1998Date of Patent: February 29, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshio Moriwaki, Akihiro Maeda, Hirokazu Kimiya, Isao Matsumoto
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Patent number: 6013390Abstract: Disclosed is a sealed alkaline storage battery with an increased utilization of a positive electrode active material comprising a nickel oxide and with drastically enhanced capacity density. The positive electrode active material is a nickel based multi-metals oxide containing at least one element such as Mn which promotes the formation of .gamma. phase during charging. The ratio A.sub..gamma. /A.sub..beta. of the integrated intensity A.sub..gamma. of the diffraction peak at d=about 7 angstroms attributed to the .gamma. phase to the integrated intensity A.sub..gamma. of the diffraction peak at d=about 4.5 to 5.0 angstroms attributed to the .beta. phase of the oxide in the completely charged state is not smaller than 0.4. The electrolyte comprises an aqueous solution containing at least one of K.sup.+ and Na.sup.+ as a cationic component and the total concentration of the above-mentioned cationic component in the completely charged state is within a range between 4 and 12 mol/l.Type: GrantFiled: September 8, 1997Date of Patent: January 11, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hirokazu Kimiya, Hidekatsu Izumi, Youichi Izumi, Hiroyuki Sakamoto, Akihiro Maeda, Isao Matsumoto