Patents by Inventor Masakazu Matsui
Masakazu Matsui 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: 8001851Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: GrantFiled: March 6, 2008Date of Patent: August 23, 2011Assignee: The Furukawa Electric Co., Ltd.Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Publication number: 20080212163Abstract: An image display element comprises a multilayer film optical filter in which layers of two or more types of materials which reflect or transmit therethrough light of a specific color and have different refractive indexs are alternately superimposed or stacked. The multilayer film optical filter is shaped like a fine particle. The multilayer film optical filter is, for example, a non-light-absorbing interference type color filter which reflects light having a predetermined color and transmits a complementary color of the predetermined color therethrough. Further, multilayer film optical filter is a dielectric multilayer film, a transparent resin multilayer film or a glass multilayer film.Type: ApplicationFiled: March 2, 2005Publication date: September 4, 2008Applicant: THE FURUKAWA ELECTRIC CO., LTD.Inventor: Masakazu Matsui
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Publication number: 20080168845Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: ApplicationFiled: March 6, 2008Publication date: July 17, 2008Applicant: THE FURUKAWA ELECTRIC CO., LTD.Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Patent number: 7360459Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: GrantFiled: September 22, 2006Date of Patent: April 22, 2008Assignee: The Furukawa Electric Co., Ltd.Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Patent number: 7304292Abstract: A displacement sensor comprising: a detecting portion including a coil arranged in such manner that a relative position to a magnetic response substance varies in correspondence to a displacement of an object to be measured; an oscillating circuit to supply an alternating-current signal with a prescribed frequency to the detecting portion; an externally attached circuit connected to the detecting portion; and a displacement detecting means to detect the displacement of the object to be measured based on an amount of phase variation of an impedance in the detecting portion and the externally attached circuit, wherein parameters of the externally attached circuit are set in such manner that the amount of the phase variation by the displacement becomes larger than the amount of the phase variation by temperature variation.Type: GrantFiled: July 25, 2005Date of Patent: December 4, 2007Assignee: The Furukawa Electric Co., Ltd.Inventors: Tsuyoshi Nakamoto, Norihisa Shibayama, Masakazu Matsui, Kazuhiko Matsuzaki
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Publication number: 20070017305Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: ApplicationFiled: September 22, 2006Publication date: January 25, 2007Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Patent number: 7121153Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: GrantFiled: July 20, 2005Date of Patent: October 17, 2006Assignee: The Furukawa Electric Co., Ltd.Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Publication number: 20060022125Abstract: A displacement sensor comprising: a detecting portion including a coil arranged in such manner that a relative position to a magnetic response substance varies in correspondence to a displacement of an object to be measured; an oscillating circuit to supply an alternating-current signal with a prescribed frequency to the detecting portion; an externally attached circuit connected to the detecting portion; and a displacement detecting means to detect the displacement of the object to be measured based on an amount of phase variation of an impedance in the detecting portion and the externally attached circuit, wherein parameters of the externally attached circuit are set in such manner that the amount of the phase variation by the displacement becomes larger than the amount of the phase variation by temperature variation.Type: ApplicationFiled: July 25, 2005Publication date: February 2, 2006Inventors: Tsuyoshi Nakamoto, Norihisa Shibayama, Masakazu Matsui, Kazuhiko Matsuzaki
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Publication number: 20050247140Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: ApplicationFiled: July 20, 2005Publication date: November 10, 2005Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Patent number: 6925893Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: GrantFiled: September 17, 2002Date of Patent: August 9, 2005Assignee: The Furukawa Electric Co., Ltd.Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Publication number: 20040050180Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.Type: ApplicationFiled: September 17, 2002Publication date: March 18, 2004Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
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Patent number: 6334977Abstract: A powder material for powder plasma build-up welding which exhibits excellent resistance and bending properties comprises C in an amount of 0.06 to 0.15% (% by weight, the same hereinafter), Si in an amount of 0.2 to 1.0%, Mn in an amount of 0.2 to 1.0%, Cr in an amount of 17 to 30%, Nb in an amount of 0.6 to 1.5%, Ni in an amount of not more than 0.5%, and the balance consisting of Fe and unavoidable impurities.Type: GrantFiled: August 21, 2000Date of Patent: January 1, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Masakazu Matsui, Akira Notomi, Toshiaki Nishio, Takayuki Maeda, Iwami Ishihara, Tetsuji Yamaguchi, Yoshimi Onitsuka, Yuichi Kojima, Ryoji Miki, Takashi Inami
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Patent number: 4772627Abstract: A ground mixture of a poorly soluble crystalline drug and an adsorbent is remarkably improved in the rates of dissolution and adsorption of the drug.Type: GrantFiled: January 15, 1987Date of Patent: September 20, 1988Assignee: Takeda Chemical Industries, Ltd.Inventors: Masakazu Matsui, Shigeharu Yokohama, Toshio Kashihara