Patents by Inventor Tetsu Yamanaka
Tetsu Yamanaka 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: 20240118348Abstract: A method of estimating life of a nickel-metal hydride battery that accommodates a positive electrode plate and a negative electrode plate facing the positive electrode plate with a separator therebetween and containing a hydrogen absorbing alloy together with an electrolyte is disclosed. A charge phase of charging the nickel-metal hydride battery and a discharge phase of discharging the nickel-metal hydride battery after the charge phase constitutes one cycle for charge/discharge of the nickel-metal hydride battery. The method includes: determining a rate of change after one charge/discharge cycle of a surface area of the negative electrode plate which is a boundary face in contact with the electrolyte, and determining an amount of corrosion of the hydrogen absorbing alloy based on the rate of change accumulated for n charge/discharge cycles to estimate the life of the nickel-metal hydride battery based on the amount of corrosion.Type: ApplicationFiled: September 27, 2023Publication date: April 11, 2024Inventors: Tetsuya Yamane, Tetsu Yamanaka, Masanori Tamura, Hideyuki Asanuma
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Patent number: 10714732Abstract: A current collecting lead is interposed between a sealing body and a positive electrode current collector for connecting the sealing body and the positive electrode current collector, the sealing body including a positive electrode terminal, the positive electrode current collector being attached to an electrode group, the current collecting lead including: a top wall portion positioned on the side of the sealing body; leg portions positioned on the side of the positive electrode current collector and that face the top wall portion; and a pair of side wall portions that extend between side edges of the top wall portion and side edges of the leg portions and that face each other, a first corner portion and a second corner portion formed by the top wall portion and the side wall portions and a third corner portion and a fourth corner portion formed by the leg portions and the side wall portions being rounded corners that are curved.Type: GrantFiled: January 11, 2018Date of Patent: July 14, 2020Assignee: FDK CORPORATIONInventors: Hidefumi Isaji, Hiroyuki Shibaoka, Isao Mugima, Tomomi Nakamura, Tetsu Yamanaka
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Patent number: 10374260Abstract: A nickel-hydrogen secondary battery includes: an outer can; a sealing body including a positive electrode terminal, the sealing body sealing an opening of the outer can; an electrode group formed by placing a positive electrode and a negative electrode on top of each other with a separator therebetween and spirally winding the positive electrode and the negative electrode, the electrode group housed in the outer can along with an alkaline electrolyte; a positive electrode current collector connected to positive electrode connection edge portion protruding from one end surface of the electrode group; and a current collecting lead connecting the positive electrode current collector and the sealing body, wherein a relationship between a deformation resistance A of a material a and a deformation resistance B of a material b satisfies a relationship of A<B, wherein the material a is a material of the current collecting lead, and the material b is a material of the positive electrode current collector.Type: GrantFiled: September 7, 2017Date of Patent: August 6, 2019Assignee: FDK CORPORATIONInventors: Tomomi Nakamura, Hiroyuki Shibaoka, Tetsu Yamanaka, Isao Mugima, Hidefumi Isaji, Hideyuki Asanuma
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Patent number: 10224139Abstract: A coil device includes two core members, one of which is E-shaped. The E-shaped core member has left and right side faces, and a center leg that extends in a vertical direction. A conducting wire is wound around a core, the core being composed of the two core members arranged to face each other in the vertical direction with a gap between the two core members. The conducting wire is wound around the center leg. First and second heat-sinking plates made of metal are bent so as to be in contact with upper and side faces of the core. The first and second plates are arranged so that first edges of the plates are placed left-right symmetrically with respect to the core with a gap between the edges. Second edges of the plates are in contact with a metal heat-sinking board where the core is placed.Type: GrantFiled: September 18, 2015Date of Patent: March 5, 2019Assignee: FDK CorporationInventors: Yuko Kanazawa, Masaru Shinoda, Kiyoto Ono, Tetsu Yamanaka, Mikio Kitaoka
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Publication number: 20180219206Abstract: A current collecting lead is interposed between a sealing body and a positive electrode current collector for connecting the sealing body and the positive electrode current collector, the sealing body including a positive electrode terminal, the positive electrode current collector being attached to an electrode group, the current collecting lead including: a top wall portion positioned on the side of the sealing body; leg portions positioned on the side of the positive electrode current collector and that face the top wall portion; and a pair of side wall portions that extend between side edges of the top wall portion and side edges of the leg portions and that face each other, a first corner portion and a second corner portion formed by the top wall portion and the side wall portions and a third corner portion and a fourth corner portion formed by the leg portions and the side wall portions being rounded corners that are curved.Type: ApplicationFiled: January 11, 2018Publication date: August 2, 2018Inventors: Hidefumi Isaji, Hiroyuki Shibaoka, Isao Mugima, Tomomi Nakamura, Tetsu Yamanaka
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Publication number: 20180069268Abstract: A nickel-hydrogen secondary battery includes: an outer can; a sealing body including a positive electrode terminal, the sealing body sealing an opening of the outer can; an electrode group formed by placing a positive electrode and a negative electrode on top of each other with a separator therebetween and spirally winding the positive electrode and the negative electrode, the electrode group housed in the outer can along with an alkaline electrolyte; a positive electrode current collector connected to positive electrode connection edge portion protruding from one end surface of the electrode group; and a current collecting lead connecting the positive electrode current collector and the sealing body, wherein a relationship between a deformation resistance A of a material a and a deformation resistance B of a material b satisfies a relationship of A<B, wherein the material a is a material of the current collecting lead, and the material b is a material of the positive electrode current collector.Type: ApplicationFiled: September 7, 2017Publication date: March 8, 2018Inventors: Tomomi Nakamura, Hiroyuki Shibaoka, Tetsu Yamanaka, Isao Mugima, Hidefumi Isaji, Hideyuki Asanuma
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Publication number: 20170243688Abstract: A coil device includes two core members, one of which is E-shaped. The E-shaped core member has left and right side faces, and a center leg that extends in a vertical direction. A conducting wire is wound around a core, the core being composed of the two core members arranged to face each other in the vertical direction with a gap between the two core members. The conducting wire is wound around the center leg. First and second heat-sinking plates made of metal are bent so as to be in contact with upper and side faces of the core. The first and second plates are arranged so that first edges of the plates are placed left-right symmetrically with respect to the core with a gap between the edges. Second edges of the plates are in contact with a metal heat-sinking board where the core is placed.Type: ApplicationFiled: September 18, 2015Publication date: August 24, 2017Inventors: Yuko KANAZAWA, Masaru SHINODA, Kiyoto ONO, Tetsu YAMANAKA, Mikio KITAOKA
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Patent number: 5622109Abstract: A heat-sensitive stencil sheet consisting of a porous substrate and a thermoplastic film adhered to the substrate is provided without no use of an adhesive. The porous substrate comprises a screen cloth wholly or partially consisting of conjugate fibers (a sheath-core type or a side-by-side type) one exposed component of which has an affinity with the thermoplastic resin film and having a melting point lower than that of the other component of the conjugate fiber and lower than that of the thermoplastic resin, and the screen cloth is adhered to the thermoplastic resin film through the exposed component.Type: GrantFiled: November 7, 1995Date of Patent: April 22, 1997Assignee: Riso Kagaku CorporationInventors: Shoichi Ikejima, Tetsu Yamanaka, Takeshi Koishihara, Kenichi Shibuya, Satoshi Chonan
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Patent number: 5501146Abstract: In a cylindrical drum 1 for stencil printing which consists of a porous cylindrical plate 2 and a screen layer 3, in which a stencil sheet is attached to the outer surface of the screen layer having an ink permeability, an ink is supplied from the inner surface of the porous cylindrical body which rotates around its own central axis, the present invention provides a screen layer consisting of a woven fabric of conjugated fibers of a sheath-and-core or a side-by-side type consisting of a lower melting component and a higher melting component and making the intersections of the fibers fixed together through the melt-adhesion of the lower melting point component by means of thermocompression bonding.Type: GrantFiled: March 29, 1994Date of Patent: March 26, 1996Assignee: Riso Kagaku CorporationInventors: Tetsu Yamanaka, Kengo Sugaya, Syouichi Ikezima
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Patent number: 5498464Abstract: A heat-sensitive stencil sheet consisting of a porous substrate and a thermoplastic film adhered to the substrate is provided without no use of an adhesive. The porous substrate comprises a screen cloth wholly or partially consisting of conjugate fibers (a sheath-core type or a side-by-side type) one exposed component of which has an affinity with the thermoplastic resin film and having a melting point lower than that of the other component of the conjugate fiber and lower than that of the thermoplastic resin, and the screen cloth is adhered to the thermoplastic resin film through the exposed component.Type: GrantFiled: August 25, 1994Date of Patent: March 12, 1996Assignee: Riso Kagaku CorporationInventors: Shoichi Ikejima, Tetsu Yamanaka, Takeshi Koishihara, Kenichi Shibuya, Satoshi Chonan