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).
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Patent number: 6853275Abstract: 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: GrantFiled: September 24, 2002Date of Patent: February 8, 2005Assignee: Fujitsu Takamisawa Component Ltd.Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
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Patent number: 6831533Abstract: 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: GrantFiled: September 24, 2002Date of Patent: December 14, 2004Assignee: Fujitsu Takamisawa Component Ltd.Inventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
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Patent number: 6756868Abstract: 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: GrantFiled: September 24, 2002Date of Patent: June 29, 2004Assignee: Fujitsu Takamisawa Component LimitedInventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
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Publication number: 20030020573Abstract: 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: ApplicationFiled: September 24, 2002Publication date: January 30, 2003Applicant: FUJITSU TAKAMISAWA COMPONENT LIMITEDInventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
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Publication number: 20030020572Abstract: 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: ApplicationFiled: September 24, 2002Publication date: January 30, 2003Applicant: FUJITSU TAKAMISAWA COMPONENT LIMITEDInventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
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Publication number: 20030020574Abstract: 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: ApplicationFiled: September 24, 2002Publication date: January 30, 2003Applicant: FUJITSU TAKAMISAWA COMPONENT LIMITEDInventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta
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Patent number: 6489868Abstract: 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: GrantFiled: February 28, 2000Date of Patent: December 3, 2002Assignee: Fujitsu Takamisawa Component LimitedInventors: Shinichi Sato, Yoshio Okamoto, Shigemitsu Aoki, Keiji Ikeda, Masato Morimuta