Patents by Inventor Hiroaki Kikuta
Hiroaki Kikuta 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: 7834717Abstract: A nonreciprocal circuit device (2-port isolator) includes a ferrite-magnet assembly including a ferrite, a first center electrode, and a second center electrode. The ferrite is sandwiched between a pair of permanent magnets and receives a direct-current magnetic field applied thereto. The first and second center electrodes are arranged on the ferrite. The ferrite includes a center layer and an outer layer ensuring an insulation state of the first and second center electrodes. The saturation magnetization of the outer layer is smaller than that of the center layer.Type: GrantFiled: February 5, 2010Date of Patent: November 16, 2010Assignee: Murata Manufacturing Co., Ltd.Inventors: Takaya Wada, Hiroaki Kikuta
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Patent number: 7834716Abstract: A nonreciprocal circuit device (2-port isolator) includes a ferrite-magnet assembly including a ferrite, a first center electrode, and a second center electrode. The ferrite is sandwiched between a pair of permanent magnets and receives a direct-current magnetic field applied thereto. The first and second center electrodes are arranged on the ferrite. The ferrite includes a center layer and an outer layer ensuring an insulation state of the first and second center electrodes. The saturation magnetization of the outer layer is larger than the saturation magnetization of the center layer.Type: GrantFiled: February 5, 2010Date of Patent: November 16, 2010Assignee: Murata Manufacturing Co., Ltd.Inventors: Takaya Wada, Hiroaki Kikuta
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Publication number: 20100127792Abstract: A nonreciprocal circuit device (2-port isolator) includes a ferrite-magnet assembly including a ferrite, a first center electrode, and a second center electrode. The ferrite is sandwiched between a pair of permanent magnets and receives a direct-current magnetic field applied thereto. The first and second center electrodes are arranged on the ferrite. The ferrite includes a center layer and an outer layer ensuring an insulation state of the first and second center electrodes. The saturation magnetization of the outer layer is larger than the saturation magnetization of the center layer.Type: ApplicationFiled: February 5, 2010Publication date: May 27, 2010Applicant: Murata Manufacturing Co., Ltd.Inventors: Takaya Wada, Hiroaki Kikuta
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Publication number: 20100127793Abstract: A nonreciprocal circuit device (2-port isolator) includes a ferrite-magnet assembly including a ferrite, a first center electrode, and a second center electrode. The ferrite is sandwiched between a pair of permanent magnets and receives a direct-current magnetic field applied thereto. The first and second center electrodes are arranged on the ferrite. The ferrite includes a center layer and an outer layer ensuring an insulation state of the first and second center electrodes. The saturation magnetization of the outer layer is smaller than that of the center layer.Type: ApplicationFiled: February 5, 2010Publication date: May 27, 2010Applicant: Murata Manufacturing Co., Ltd.Inventors: Takaya Wada, Hiroaki Kikuta
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Patent number: 7034637Abstract: An electronic component including a magnetic member comprising an iron oxide magnetic composition, a nonmagnetic member in contact with the magnetic member and including a glass ceramic composite composition, and an internal conductor portion disposed in at least one of the magnetic member and the nonmagnetic member. The glass ceramic composite composition includes crystallized glass as a main component, and quartz as a sub-component filler. The crystallized glass contains 25 percent by weight to 55 percent by weight of SiO2, 30 percent by weight to 55 percent by weight of MgO, 5 percent by weight to 30 percent by weight of Al2O3, and 0 percent by weight to 30 percent by weight of B2O3, and the content of the quartz is 5 percent by weight to 30 percent by weight relative to 100 percent by weight of the crystallized glass.Type: GrantFiled: April 21, 2004Date of Patent: April 25, 2006Assignee: Murata Manufacturing Co., Ltd.Inventors: Daiji Kono, Hiroaki Kikuta
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Publication number: 20040207488Abstract: An electronic component including a magnetic member comprising an iron oxide magnetic composition, a nonmagnetic member in contact with the magnetic member and including a glass ceramic composite composition, and an internal conductor portion disposed in at least one of the magnetic member and the nonmagnetic member. The glass ceramic composite composition includes crystallized glass as a main component, and quartz as a sub-component filler. The crystallized glass contains 25 percent by weight to 55 percent by weight of SiO2, 30 percent by weight to 55 percent by weight of MgO, 5 percent by weight to 30 percent by weight of Al2O3, and 0 percent by weight to 30 percent by weight of B2O3, and the content of the quartz is 5 percent by weight to 30 percent by weight relative to 100 percent by weight of the crystallized glass.Type: ApplicationFiled: April 21, 2004Publication date: October 21, 2004Inventors: Daiji Kono, Hiroaki Kikuta
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Patent number: 6771140Abstract: A high-frequency magnetic ceramic comprises garnet ferrite represented by the formula AZB8-ZO12 wherein the site A comprises yttrium and the site B comprises iron, where Z is in the range of more than 3.00 to 3.09. The relative density of the high-frequency magnetic ceramic is at least 95%, the average grain diameter is at least 3 &mgr;m, and the 3&sgr; value of the grain diameters is 2 &mgr;m or less wherein &sgr; represents the standard deviation of the grain diameters. A high-frequency circuit component includes microwave magnetic composites composed of the high-frequency magnetic ceramic and central electrodes that are mutually insulated.Type: GrantFiled: January 17, 2003Date of Patent: August 3, 2004Assignee: Murata Manufacturing Co. LtdInventor: Hiroaki Kikuta
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Publication number: 20030197571Abstract: A high-frequency magnetic ceramic comprises garnet ferrite represented by the formula AZB8-ZO12 wherein the site A comprises yttrium and the site B comprises iron, where Z is in the range of more than 3.00 to 3.09. The relative density of the high-frequency magnetic ceramic is at least 95%, the average grain diameter is at least 3 ?m, and the 3? value of the grain diameters is 2 ?m or less wherein ? represents the standard deviation of the grain diameters. A high-frequency circuit deviation of the grain diameters. A high-frequency circuit component includes microwave magnetic composites composed of the high-frequency magnetic ceramic and central electrodes that are mutually insulated.Type: ApplicationFiled: January 17, 2003Publication date: October 23, 2003Inventor: Hiroaki Kikuta
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Patent number: 5502954Abstract: Flap folding device of a wrapping machine. Side folding guides approach side flaps to hit a hitting part against the closed side faces of a wrapped body part of a content or volume, thereby pressing a wrapped body part, near the base end of the side flaps that face the closed side faces, against the closed side faces. Subsequently, the middle part of each of the side folding guides makes a quarter turn while tracing a corner continued to the closed side faces,. Therefore, the base ends of the side flaps are folded along the corners while being pulled toward the forward end thereof, and, at the same time, are pressed by folding parts against the open sides, through the entire length, from the base end to the forward end, of the side flaps.Type: GrantFiled: January 13, 1994Date of Patent: April 2, 1996Assignee: Tokyo Automatic Machinery Works, Ltd.Inventors: Heiemon Akiyama, Masafumi Hamaguchi, Minoru Sato, Hiroaki Kikuta