Patents by Inventor Tooru Tanimizu
Tooru Tanimizu 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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Publication number: 20060208841Abstract: An actuating mechanism for a switching device includes a plurality of electromagnets used in combination. Each electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.Type: ApplicationFiled: May 19, 2006Publication date: September 21, 2006Inventors: Ayumu Morita, Yasuaki Suzuki, Masato Yabu, Tooru Tanimizu, Yozo Shibata, Takashi Kadowaki
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Patent number: 7075398Abstract: An electromagnet a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.Type: GrantFiled: February 25, 2004Date of Patent: July 11, 2006Assignees: Hitachi, Ltd., Hitachi Engineering & Services, Co., Ltd.Inventors: Ayumu Morita, Yasuaki Suzuki, Masato Yabu, Tooru Tanimizu, Yozo Shibata, Takashi Kadowaki
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Patent number: 6951993Abstract: A vacuum switch comprises a vacuum container, a grounding switch and a load switch disposed in the container, and an external connection conductor disposed in the vacuum container and to be connected electrically inside and outside the vacuum container, and it is characterized in that the grounding switch and the external connection conductor are electrically connected to each other in the vacuum container.Type: GrantFiled: June 9, 2004Date of Patent: October 4, 2005Assignees: Hitachi, Ltd., The Tokyo Electric Power Company, IncorporatedInventors: Shuuichi Kikukawa, Yasuaki Suzuki, Tooru Tanimizu, Koichi Murata, Ryotaro Hanabuchi
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Patent number: 6940376Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.Type: GrantFiled: May 27, 2004Date of Patent: September 6, 2005Assignee: Hitachi, Ltd.Inventors: Ayumu Morita, Yasuaki Suzuki, Masato Yabu, Tooru Tanimizu, Yozo Shibata, Takashi Kadowaki
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Patent number: 6881917Abstract: Disclosed is a vacuum switchgear wherein a ground switch, a load switch, and an external connecting conductor to be electrically connected with the inside and outside of the vacuum container are provided in a vacuum container; the ground switch and the external connecting conductor are electrically connected in the vacuum container; and the vacuum container has a joint construction of a body portion having openings on both ends thereof, and a lid joined to the opening of the body.Type: GrantFiled: April 6, 2004Date of Patent: April 19, 2005Assignee: Hitachi, Ltd.Inventors: Shuuichi Kikukawa, Yasuaki Suzuki, Masato Kobayshi, Tooru Tanimizu, Takuya Miyo
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Patent number: 6855903Abstract: A vacuum switch comprises a vacuum container, a grounding switch and a load switch disposed in the container, and an external connection conductor disposed in the vacuum container and to be connected electrically inside and outside the vacuum container, and it is characterized in that the grounding switch and the external connection conductor are electrically connected to each other in the vacuum container.Type: GrantFiled: February 13, 2003Date of Patent: February 15, 2005Assignees: Hitachi, Ltd., The Tokyo Electric Power Company, IncorporatedInventors: Shuuichi Kikukawa, Yasuaki Suzuki, Tooru Tanimizu, Koichi Murata, Ryotaro Hanabuchi
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Publication number: 20040256360Abstract: Disclosed is a vacuum switchgear wherein a ground switch, a load switch, and an external connecting conductor to be electrically connected with the inside and outside of the vacuum container are provided in a vacuum container; the ground switch and the external connecting conductor are electrically connected in the vacuum container; and the vacuum container has a joint construction of a body portion having openings on both ends thereof, and a lid joined to the opening of the body.Type: ApplicationFiled: April 6, 2004Publication date: December 23, 2004Inventors: Shuuichi Kikukawa, Yasuaki Suzuki, Masato Kobayashi, Tooru Tanimizu, Takuya Miyo
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Publication number: 20040222192Abstract: A vacuum switch comprises a vacuum container, a grounding switch and a load switch disposed in the container, and an external connection conductor disposed in the vacuum container and to be connected electrically inside and outside the vacuum container, and it is characterized in that the grounding switch and the external connection conductor are electrically connected to each other in the vacuum container.Type: ApplicationFiled: June 9, 2004Publication date: November 11, 2004Applicants: Hitachi, Ltd., The Tokyo Electric Power Company, Inc.Inventors: Shuuichi Kikukawa, Yasuaki Suzuki, Tooru Tanimizu, Koichi Murata, Ryotaro Hanabuchi
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Patent number: 6816048Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.Type: GrantFiled: September 20, 2001Date of Patent: November 9, 2004Assignees: Hitachi, Ltd., Hitachi Engineering & Services, Co., Ltd.Inventors: Ayumu Morita, Yasuaki Suzuki, Masato Yabu, Tooru Tanimizu, Yozo Shibata, Takashi Kadowaki
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Publication number: 20040217834Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.Type: ApplicationFiled: May 27, 2004Publication date: November 4, 2004Applicants: Hitachi, Ltd., Hitachi Engineering & Services, Co. , Ltd.Inventors: Ayumu Morita, Yasuaki Suzuki, Masato Yabu, Tooru Tanimizu, Yozo Shibata, Takashi Kadowaki
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Publication number: 20040164828Abstract: An electromagnet composed of a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil, characterized by a permanent magnet arranged in a gap surrounded by the movable iron core and the stationary core, wherein the movable iron core is attracted by the stationary iron core by a magnetic field created by the permanent magnet, thereby it is possible to solve a problem inherent to a conventional electromagnet such that a permanent magnet is directly energized in a reverse direction during release operation so as to cause demagnetization of the permanent magnet.Type: ApplicationFiled: February 25, 2004Publication date: August 26, 2004Applicants: HITACHI, LTD., HITACHI ENGINEERING & SERVICES CO., LTD.Inventors: Ayumu Morita, Yasuaki Suzuki, Masato Yabu, Tooru Tanimizu, Yozo Shibata, Takashi Kadowaki
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Publication number: 20030230553Abstract: A vacuum switch comprises a vacuum container, a grounding switch and a load switch disposed in the container, and an external connection conductor disposed in the vacuum container and to be connected electrically inside and outside the vacuum container, and it is characterized in that the grounding switch and the external connection conductor are electrically connected to each other in the vacuum container.Type: ApplicationFiled: February 13, 2003Publication date: December 18, 2003Inventors: Shuuichi Kikukawa, Yasuaki Suzuki, Tooru Tanimizu, Koichi Murata, Ryotaro Hanabuchi
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Publication number: 20030192860Abstract: An object of this invention is to provide a vacuum switch in which the assembling property of the parts to be accommodated in the interior of the vacuum container is improved, the configuration of the vacuum container is simplified, and the parts to be accommodated in the interior of the container can be assembled easily. This invention is a vacuum switch wherein a ground switch, a load switch, and an external connecting conductor to be electrically connected with the inside and outside of the vacuum container are provided in a vacuum container; the ground switch and the external connecting conductor are electrically connected in the vacuum container; and the vacuum container has a joint construction of a body portion having openings on both ends thereof, and a lid joined to the opening of the body.Type: ApplicationFiled: November 26, 2002Publication date: October 16, 2003Inventors: Shuuichi Kikukawa, Yasuaki Suzuki, Masato Kobayashi, Tooru Tanimizu, Takuya Miyo
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Patent number: 6529009Abstract: A vacuum switch is composed by installing a vacuum circuit-breaker and a disconnector in different grounded vacuum vessels, respectively, and a vacuum-measurement device is attached to each grounded vacuum vessel. The above vacuum vessel communicates with one of the grounded vacuum vessels, and the degree of vacuum in the vacuum vessel can be directly measured and monitored.Type: GrantFiled: June 18, 2002Date of Patent: March 4, 2003Assignee: Hitachi, Ltd.Inventors: Shuuichi Kikukawa, Katsunori Kojima, Tooru Tanimizu, Ayumu Morita, Masashige Tsuji
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Publication number: 20020149372Abstract: A vacuum switch is composed by installing a vacuum circuit-breaker and a disconnector in different grounded vacuum vessels, respectively, and a vacuum-measurement device is attached to each grounded vacuum vessel. The above vacuum vessel communicates with one of the grounded vacuum vessels, and the degree of vacuum in the vacuum vessel can be directly measured and monitored.Type: ApplicationFiled: June 18, 2002Publication date: October 17, 2002Applicant: Hitachi, Ltd.Inventors: Shuuichi Kikukawa, Katsunori Kojima, Tooru Tanimizu, Ayumu Morita, Masashige Tsuji
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Patent number: 6426627Abstract: A vacuum switch is composed by installing a vacuum circuit-breaker and a disconnector in different grounded vacuum vessels, respectively, and a vacuum-measurement device is attached to each grounded vacuum vessel. The above vacuum vessel communicates with one of the grounded vacuum vessels, and the degree of vacuum in the vacuum vessel can be directly measured and monitored.Type: GrantFiled: December 11, 2000Date of Patent: July 30, 2002Assignee: Hitachi, Ltd.Inventors: Shuuichi Kikukawa, Katsunori Kojima, Tooru Tanimizu, Ayumu Morita, Masashige Tsuji
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Publication number: 20020093408Abstract: An electromagnet composed of a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil, characterized by a permanent magnet arranged in a gap surrounded by the movable iron core and the stationary core, wherein the movable iron core is attracted by the stationary iron core by a magnetic field created by the permanent magnet, thereby it is possible to solve a problem inherent to a conventional electromagnet such that a permanent magnet is directly energized in a reverse direction during release operation so as to cause demagnetization of the permanent magnet.Type: ApplicationFiled: September 20, 2001Publication date: July 18, 2002Inventors: Ayumu Morita, Yasuaki Suzuki, Masato Yabu, Tooru Tanimizu, Yozo Shibata, Takashi Kadowaki
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Patent number: 6335502Abstract: In order to provide a vacuum switch suitable for a distribution and transformation system compatible between structural simplicity and reliability and a vacuum switchgear using the vacuum switch, the vacuum switch comprises switching portions installed in a grounded vacuum container; and a breaker, a grounding switch and an isolator as things having the switching portions, wherein the vacuum container is divided into at least two chambers, and the switching portion of the breaker is disposed in one of the chambers and the switching portions of the grounding switch and the isolator are disposed in the other of the chambers through an insulation body.Type: GrantFiled: January 19, 2000Date of Patent: January 1, 2002Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Tooru Tanimizu, Minoru Kanoi, Makoto Tazawa, Takuya Miyo
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Publication number: 20010017288Abstract: An electromagnet according to the present invention comprises a fixed core 1 formed by side legs 2b provided on both sides of a central leg 2a produced by laminating a plurality of steel plates, and a yoke 2c for connection between the central leg and the side legs, the central leg, the side legs, and the yoke being integral with each other; an exciting coil 4 wound around the central leg 2a; and a moving core 3X opposed to the central leg and the exciting coil which is moved along the side legs; wherein length of the side legs 2b is longer than that of the central leg; and the moving core 3X opposed to the central leg 2a has a projection 3a extending to the central leg side. Therefore, occurrence of eddy current is reduced and attractive force is increased.Type: ApplicationFiled: February 23, 2001Publication date: August 30, 2001Inventors: Ayumu Morita, Tooru Tanimizu, Masato Yabu
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Patent number: RE37244Abstract: In an insulated type switching device, during rotation of a movable conductor 19 around a pivotal axis 35 between a stationary conductor 16 and a ground conductor 17 all of which are disposed in a vacuum vessel 12, the movable conductor 19 uninterruptedly takes four positions of closing position Y1, opening position Y2, disconnecting position Y3 and grounding position Y4, thereby a series of switching operations can be performed uninterruptedly, the operation and handling thereof are facilitated as well as the size of the insulated type switching device is reduced.Type: GrantFiled: January 29, 1999Date of Patent: June 26, 2001Assignee: Hitachi, Ltd.Inventors: Tooru Tanimizu, Masayoshi Hayakawa, Fumio Shibata, Masato Kobayashi, Satoru Kajiwara, Masatoshi Morita, Ayunu Morita