Patents by Inventor Minajuro Ushijima

Minajuro Ushijima 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).

  • Patent number: 7767336
    Abstract: There is provided an alkaline battery produced by sealing in an outer package body: a positive mixture containing at least one selected from manganese dioxide and a nickel oxide, a conducting agent, and an alkaline electrolytic solution (A) containing potassium hydroxide; a separator; and a negative mixture containing zinc alloy powder, a gelling agent, and an alkaline electrolytic solution (B) containing potassium hydroxide where a concentration of potassium hydroxide of the alkaline electrolytic solution (A) is 45 wt % or more, and a concentration of potassium hydroxide of the alkaline electrolytic solution (B) is 35 wt % or less. Because of this, an alkaline battery can be provided, which has desirable load characteristics, prevents the generation of gas, prevents a decrease in a storage property due to the reaction with an electrolytic solution, and has heat generation behavior suppressed at a time of occurrence of a short-circuit.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: August 3, 2010
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Noriyuki Ito, Minajuro Ushijima, Shinichi Iwamoto, Tetsuo Izu
  • Patent number: 7510801
    Abstract: There is provided an alkaline battery produced by sealing in an outer package body: a positive mixture containing at least one selected from manganese dioxide and a nickel oxide, a conducting agent, and an alkaline electrolytic solution (A) containing potassium hydroxide; a separator; and a negative mixture containing zinc alloy powder, a gelling agent, and an alkaline electrolytic solution (B) containing potassium hydroxide where a concentration of potassium hydroxide of the alkaline electrolytic solution (A) is 45 wt % or more, and a concentration of potassium hydroxide of the alkaline electrolytic solution (B) is 35 wt % or less. Because of this, an alkaline battery can be provided, which has desirable load characteristics, prevents the generation of gas, prevents a decrease in a storage property due to the reaction with an electrolytic solution, and has heat generation behavior suppressed at a time of occurrence of a short-circuit.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: March 31, 2009
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Noriyuki Ito, Minajuro Ushijima, Shinichi Iwamoto, Tetsuo Izu
  • Publication number: 20080160402
    Abstract: There is provided an alkaline battery produced by sealing in an outer package body: a positive mixture containing at least one selected from manganese dioxide and a nickel oxide, a conducting agent, and an alkaline electrolytic solution (A) containing potassium hydroxide; a separator; and a negative mixture containing zinc alloy powder, a gelling agent, and an alkaline electrolytic solution (B) containing potassium hydroxide where a concentration of potassium hydroxide of the alkaline electrolytic solution (A) is 45 wt % or more, and a concentration of potassium hydroxide of the alkaline electrolytic solution (B) is 35 wt % or less. Because of this, an alkaline battery can be provided, which has desirable load characteristics, prevents the generation of gas, prevents a decrease in a storage property due to the reaction with an electrolytic solution, and has heat generation behavior suppressed at a time of occurrence of a short-circuit.
    Type: Application
    Filed: February 28, 2008
    Publication date: July 3, 2008
    Inventors: Noriyuki ITO, Minajuro Ushijima, Shinichi Iwamoto, Tetsuo Izu
  • Publication number: 20080160403
    Abstract: There is provided an alkaline battery produced by sealing in an outer package body: a positive mixture containing at least one selected from manganese dioxide and a nickel oxide, a conducting agent, and an alkaline electrolytic solution (A) containing potassium hydroxide; a separator; and a negative mixture containing zinc alloy powder, a gelling agent, and an alkaline electrolytic solution (B) containing potassium hydroxide where a concentration of potassium hydroxide of the alkaline electrolytic solution (A) is 45 wt % or more, and a concentration of potassium hydroxide of the alkaline electrolytic solution (B) is 35 wt % or less. Because of this, an alkaline battery can be provided, which has desirable load characteristics, prevents the generation of gas, prevents a decrease in a storage property due to the reaction with an electrolytic solution, and has heat generation behavior suppressed at a time of occurrence of a short-circuit.
    Type: Application
    Filed: February 28, 2008
    Publication date: July 3, 2008
    Inventors: Noriyuki ITO, Minajuro Ushijima, Shinichi Iwamoto, Tetsuo Izu
  • Patent number: 7172833
    Abstract: The present invention discloses an alkaline dry cell with a high capacity having a superior liquid leak resistant property. In this alkaline dry cell, the thickness of the trunk portion of an external can is made thinner than 0.18 mm, and the thickness of the sealing edge portion of the external can is set to not less than 1.4 times the thickness of trunk portion. An anode terminal plate is used as a supporting member for a sealing member. Over the entire outer circumferential portion of the anode terminal plate is placed a curved portion having an average curvature radius of not more than 1 mm, which shows a virtually C-letter shape or an arc shape in its cross-section obtained by cutting the anode terminal plate through its center in the thickness direction.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: February 6, 2007
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Makoto Urade, Shoichiro Tateishi, Koji Koide, Shinichi Iwamoto, Minajuro Ushijima
  • Publication number: 20060292441
    Abstract: A cylindrical alkaline battery of the present invention includes a positive outer can in the form of a cylinder having a bottom and an opening at its top, a sealing member located along the inner edge of the opening, and a negative terminal for sealing the opening along with the sealing member. The negative terminal is caulked to the inner edge of the opening of the positive outer can via the sealing member. The positive outer can is formed of a metal plate including crystal grains with a grain size number of 9 to 12. A soft nickel-plating layer is deposited on both sides of the metal plate. The cylindrical alkaline battery further includes either or both of the following two configurations. Configuration 1: The surface roughness Ra of a portion of the positive outer can that comes into contact with the sealing member is 2 or less.
    Type: Application
    Filed: June 22, 2006
    Publication date: December 28, 2006
    Inventors: Minajuro Ushijima, Noriyuki Ito
  • Patent number: 7090944
    Abstract: The present invention discloses an alkaline dry cell containing a cathode and an anode, a separator and an electrolyte solution that are housed inside an external can, and a resin sealing member and a supporting member for supporting the sealing member with an inner circumferential side that are attached to an opening edge of the external can, wherein the opening edge of the external can is sealed by tightening the resin sealing member with the external can and the supporting member.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: August 15, 2006
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Makoto Urade, Shoichiro Tateishi, Koji Koide, Shinichi Iwamoto, Minajuro Ushijima
  • Publication number: 20040253506
    Abstract: The present invention discloses an alkaline dry cell with a high capacity having a superior liquid leak resistant property. In this alkaline dry cell, the thickness of the trunk portion of an external can is made thinner than 0.18 mm, and the thickness of the sealing edge portion of the external can is set to not less than 1.4 times the thickness of trunk portion. An anode terminal plate is used as a supporting member for a sealing member. Over the entire outer circumferential portion of the anode terminal plate is placed a curved portion having an average curvature radius of not more than 1 mm, which shows a virtually C-letter shape or an arc shape in its cross-section obtained by cutting the anode terminal plate through its center in the thickness direction.
    Type: Application
    Filed: May 3, 2004
    Publication date: December 16, 2004
    Applicant: Hitachi Maxell, Ltd.
    Inventors: Makoto Urade, Shoichiro Tateishi, Koji Koide, Shinichi Iwamoto, Minajuro Ushijima
  • Publication number: 20040253511
    Abstract: The present invention discloses an alkaline dry cell with a high capacity having a superior liquid leak resistant property. In this alkaline dry cell, the thickness of the trunk portion of an external can is made thinner than 0.18 mm, and the thickness of the sealing edge portion of the external can is set to not less than 1.4 times the thickness of trunk portion. An anode terminal plate is used as a supporting member for a sealing member. Over the entire outer circumferential portion of the anode terminal plate is placed a curved portion having an average curvature radius of not more than 1 mm, which shows a virtually C-letter shape or an arc shape in its cross-section obtained by cutting the anode terminal plate through its center in the thickness direction.
    Type: Application
    Filed: May 3, 2004
    Publication date: December 16, 2004
    Applicant: Hitachi Maxell, Ltd.
    Inventors: Makoto Urade, Shoichiro Tateishi, Koji Koide, Shinichi Iwamoto, Minajuro Ushijima
  • Publication number: 20040009394
    Abstract: There is provided an alkaline battery produced by sealing in an outer package body: a positive mixture containing at least one selected from manganese dioxide and a nickel oxide, a conducting agent, and an alkaline electrolytic solution (A) containing potassium hydroxide; a separator; and a negative mixture containing zinc alloy powder, a gelling agent, and an alkaline electrolytic solution (B) containing potassium hydroxide where a concentration of potassium hydroxide of the alkaline electrolytic solution (A) is 45 wt % or more, and a concentration of potassium hydroxide of the alkaline electrolytic solution (B) is 35 wt % or less. Because of this, an alkaline battery can be provided, which has desirable load characteristics, prevents the generation of gas, prevents a decrease in a storage property due to the reaction with an electrolytic solution, and has heat generation behavior suppressed at a time of occurrence of a short-circuit.
    Type: Application
    Filed: July 11, 2003
    Publication date: January 15, 2004
    Inventors: Noriyuki Ito, Minajuro Ushijima, Shinichi Iwamoto, Tetsuo Izu
  • Publication number: 20020090549
    Abstract: The present invention discloses an alkaline dry cell with a high capacity having a superior liquid leak resistant property. In this alkaline dry cell, the thickness of the trunk portion of an external can is made thinner than 0.18 mm, and the thickness of the sealing edge portion of the external can is set to not less than 1.4 times the thickness of trunk portion. An anode terminal plate is used as a supporting member for a sealing member. Over the entire outer circumferential portion of the anode terminal plate is placed a curved portion having an average curvature radius of not more than 1 mm, which shows a virtually C-letter shape or an arc shape in its cross-section obtained by cutting the anode terminal plate through its center in the thickness direction.
    Type: Application
    Filed: August 30, 2001
    Publication date: July 11, 2002
    Inventors: Makoto Urade, Shoichiro Tateishi, Koji Koide, Shinichi Iwamoto, Minajuro Ushijima