Patents by Inventor Akiko Miyahara

Akiko Miyahara 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: 7247409
    Abstract: The hydrogen storage alloy electrode comprises: a conductive core material; and an active material layer which contains a hydrogen storage alloy powder and is carried on said core material, and the alloy powder has any shape selected from the group consisting of spherical shapes, substantially spherical shapes and oval shapes. The core material comprises: a conductive sheet; and fibrous or columnar sintered nickel pieces bonded to the surface of the conductive sheet. Alternatively, the active material layer comprises: an active material layer A which contains a hydrogen storage alloy powder A with a mean particle size “a” and is carried on said core material; and an active material layer B which contains a hydrogen storage alloy powder B with a mean particle size “b” and is carried on said active material layer A (wherein a<b). Alternatively, the active material layer further contains a crushed alloy powder having on the surface thereof at least one selected from the group consisting of nickel and cobalt.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: July 24, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazutaka Ikeda, Susumu Kikuyama, Akiko Miyahara, Kohji Yuasa
  • Patent number: 7135660
    Abstract: An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound round each bobbin beforehand with leads being laid inside of the conductor. The bobbin may be implemented as a plurality of bobbin members removably connected together.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: November 14, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Akiko Miyahara, Toshiaki Higaya, Masae Sugawara, Tomotaka Takamura
  • Publication number: 20050242084
    Abstract: An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound round each bobbin beforehand with leads being laid inside of the conductor. The bobbin may be implemented as a plurality of bobbin members removably connected together.
    Type: Application
    Filed: July 8, 2005
    Publication date: November 3, 2005
    Inventors: Akiko Miyahara, Toshiaki Higaya, Masae Sugawara, Tomotaka Takamura
  • Patent number: 6946629
    Abstract: An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound round each bobbin beforehand with leads being laid inside of the conductor. The bobbin may be implemented as a plurality of bobbin members removably connected together.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: September 20, 2005
    Assignees: Ricoh Company, Ltd., Tohoku Ricoh Co., Ltd.
    Inventors: Akiko Miyahara, Toshiaki Higaya, Masae Sugawara, Tomotaka Takamura
  • Publication number: 20040188423
    Abstract: An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound round each bobbin beforehand with leads being laid inside of the conductor. The bobbin may be implemented as a plurality of bobbin members removably connected together.
    Type: Application
    Filed: March 29, 2004
    Publication date: September 30, 2004
    Inventors: Akiko Miyahara, Toshiaki Higaya, Masae Sugawara, Tomotaka Takamura
  • Patent number: 6753515
    Abstract: An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound round each bobbin beforehand with leads being laid inside of the conductor. The bobbin may be implemented as a plurality of bobbin members removably connected together.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: June 22, 2004
    Assignees: Ricoh Company, Ltd., Tohoku Ricoh Co., Ltd.
    Inventors: Akiko Miyahara, Toshiaki Higaya, Masae Sugawara, Tomotaka Takamura
  • Patent number: 6740450
    Abstract: An alkaline storage battery which is excellent in charge and discharge cycle life characteristics and high-rate discharge characteristics is provided by constructing it using an electrode made of an MmNi type hydrogen-absorbing alloy powders having modified surface. The alkaline storage battery comprises a negative electrode made using a hydrogen-absorbing alloy in the form of powders comprising at least one rare earth element, nickel and at least one transition metal in which the surface portion of the alloy has nickel in metallic state exposed at the surface, pores positioned between the nickel and the nickel, and a nickel-rich layer present on the alloy surface contacting with the pores, a positive electrode made using a metal oxide, a separator, and an alkaline electrolyte.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: May 25, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Susumu Kikuyama, Takashi Ebihara, Akiko Miyahara, Xianglong Wang, Kohji Yuasa
  • Patent number: 6699617
    Abstract: The present invention provides an alkaline storage battery excellent in high-rate charge and discharge characteristics, and a hydrogen-absorbing alloy electrode suitable for the battery and a method for producing the same. The hydrogen-absorbing alloy is preferably produced by wet grinding in water a hydrogen-absorbing alloy having at least one rare earth element, nickel and at least one transition metal element, treating the resulting alloy powders in an aqueous alkali solution, and then consecutively treating the powders in an acidic aqueous solution. The hydrogen-absorbing alloy powders have a structure of a nickel-condensed layer being exposed and have many pores.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: March 2, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Ebihara, Susumu Kikuyama, Akiko Miyahara, Xianglong Wang, Kohji Yuasa
  • Publication number: 20030134197
    Abstract: The hydrogen storage alloy electrode comprises: a conductive core material; and an active material layer which contains a hydrogen storage alloy powder and is carried on said core material, and the alloy powder has any shape selected from the group consisting of spherical shapes, substantially spherical shapes and oval shapes. The core material comprises: a conductive sheet; and fibrous or columnar sintered nickel pieces bonded to the surface of the conductive sheet. Alternatively, the active material layer comprises: an active material layer A which contains a hydrogen storage alloy powder A with a mean particle size “a” and is carried on said core material; and an active material layer B which contains a hydrogen storage alloy powder B with a mean particle size “b” and is carried on said active material layer A (wherein a<b).
    Type: Application
    Filed: February 21, 2003
    Publication date: July 17, 2003
    Inventors: Kazutaka Ikeda, Susumu Kikuyama, Akiko Miyahara, Kohji Yuasa
  • Publication number: 20020051908
    Abstract: The present invention provides an alkaline storage battery excellent in high-rate charge and discharge characteristics, and a hydrogen-absorbing alloy electrode suitable for the battery and a method for producing the same. The hydrogen-absorbing alloy is preferably produced by wet grinding in water a hydrogen-absorbing alloy comprising at least one rare earth element, nickel and at least one transition metal element, treating the resulting alloy powders in an aqueous alkali solution, and then consecutively treating the powders in an acidic aqueous solution. The hydrogen-absorbing alloy powders have a structure of a nickel-condensed layer being exposed and have many pores.
    Type: Application
    Filed: August 28, 2001
    Publication date: May 2, 2002
    Inventors: Takashi Ebihara, Susumu Kikuyama, Akiko Miyahara, Xianglong Wang, Kohji Yuasa
  • Publication number: 20020031381
    Abstract: An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound round each bobbin beforehand with leads being laid inside of the conductor. The bobbin may be implemented as a plurality of bobbin members removably connected together.
    Type: Application
    Filed: April 27, 2001
    Publication date: March 14, 2002
    Applicant: Ricoh Company, Ltd.
    Inventors: Akiko Miyahara, Toshiaki Higaya, Masae Sugawara, Tomotaka Takamura
  • Publication number: 20010054458
    Abstract: An alkaline storage battery which is excellent in charge and discharge cycle life characteristics and high-rate discharge characteristics is provided by constructing it using an electrode made of an MmNi type hydrogen-absorbing alloy powders having modified surface. The alkaline storage battery comprises a negative electrode made using a hydrogen-absorbing alloy in the form of powders comprising at least one rare earth element, nickel and at least one transition metal in which the surface portion of the alloy has nickel in metallic state exposed at the surface, pores positioned between the nickel and the nickel, and a nickel-rich layer present on the alloy surface contacting with the pores, a positive electrode made using a metal oxide, a separator, and an alkaline electrolyte.
    Type: Application
    Filed: July 24, 2001
    Publication date: December 27, 2001
    Inventors: Susumu Kikuyama, Takashi Ebihara, Akiko Miyahara, Xianglong Wang, Kohji Yuasa
  • Patent number: 6331367
    Abstract: The present invention provides an alkaline storage battery excellent in high-rate charge and discharge characteristics, and a hydrogen-absorbing alloy electrode suitable for the battery and a method for producing the same. The hydrogen-absorbing alloy is preferably produced by wet grinding in water a hydrogen-absorbing alloy comprising at least one rare earth element, nickel and at least one transition metal element, treating the resulting alloy powders in an aqueous alkali solution, and then consecutively treating the powders in an acidic aqueous solution. The hydrogen-absorbing alloy powders have a structure of a nickel-condensed layer being exposed and have many pores.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: December 18, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Ebihara, Susumu Kikuyama, Akiko Miyahara, Xianglong Wang, Kohji Yuasa