Patents by Inventor Masato Morimuta

Masato Morimuta 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: 6853275
    Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: February 8, 2005
    Assignee: Fujitsu Takamisawa Component Ltd.
    Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
  • Patent number: 6831533
    Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: December 14, 2004
    Assignee: Fujitsu Takamisawa Component Ltd.
    Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
  • Patent number: 6756868
    Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: June 29, 2004
    Assignee: Fujitsu Takamisawa Component Limited
    Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
  • Publication number: 20030020573
    Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.
    Type: Application
    Filed: September 24, 2002
    Publication date: January 30, 2003
    Applicant: FUJITSU TAKAMISAWA COMPONENT LIMITED
    Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
  • Publication number: 20030020572
    Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.
    Type: Application
    Filed: September 24, 2002
    Publication date: January 30, 2003
    Applicant: FUJITSU TAKAMISAWA COMPONENT LIMITED
    Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
  • Publication number: 20030020574
    Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.
    Type: Application
    Filed: September 24, 2002
    Publication date: January 30, 2003
    Applicant: FUJITSU TAKAMISAWA COMPONENT LIMITED
    Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
  • Patent number: 6489868
    Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contacts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: December 3, 2002
    Assignee: Fujitsu Takamisawa Component Limited
    Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta