Patents by Inventor Naoto Sesita
Naoto Sesita 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: 7573171Abstract: A rotation control motor comprises a shaft, an armature having an armature core of which teeth are wound by wires to form coils, a commutator, and a field magnet. The armature core has a plurality of teeth, the commutator has a plurality of commutator segments corresponding to the number of teeth, and the coils comprise a normal coil and a brake coil. When the motor rotates faster than expected, the brake coil brakes the motor by magnetic flux, and the motor can rotate within a stable speed range.Type: GrantFiled: April 21, 2006Date of Patent: August 11, 2009Assignee: Igarashi Electric Works Ltd.Inventors: Naoto Sesita, Katuyuki Tanaka, Yusuke Mizukoshi, Hiroyuki Kurihara, Yoshihisa Watanabe
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Patent number: 7511396Abstract: A motor comprises a yoke as casing, a shaft extending along a center of the yoke, an annular stator fixed to the yoke and an armature fixed to the shaft to rotate with the shaft inside the stator. The armature comprises a plurality of teeth on the outer circumferential surface. A wire is wound on any of the teeth to form a normal coil. Another wire is wound on another of the teeth to form a brake coil that is a short circuit. When the motor rotates much faster, the brake coil produces magnetic flux which acts as load against the rotation of the motor to allow the motor to rotate slower.Type: GrantFiled: April 19, 2006Date of Patent: March 31, 2009Assignees: Igarashi Electric Works Ltd., Mitsui Mining and Smelting Co., Ltd.Inventors: Naoto Sesita, Katuyuki Tanaka, Yusuke Mizukoshi, Hiroyuki Kurihara, Yoshihisa Watanabe, Hiroshi Sato
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Patent number: 7478574Abstract: A motor shaft puts through a motor casing and a gear casing which are detachably connected to each other. In the motor casing, a rotor is fixed to the motor shaft, while a stator is fixed on the inner circumferential surface of the motor casing. The motor shaft has a worm which engages with a worm wheel in the gear casing. A collar in which the motor shaft is pressingly fitted is provided in the middle of the motor shaft at the end of the gear casing. The motor shaft is supported at each end of the worm in the gear casing.Type: GrantFiled: April 19, 2006Date of Patent: January 20, 2009Assignee: Igarashi Electric Works, Ltd.Inventors: Naoto Sesita, Katuyuki Tanaka, Yusuke Mizukoshi, Hiroyuki Kurihara, Yoshihisa Watanabe
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Publication number: 20080116758Abstract: A motor comprises a rotor fixed to a shaft and a stator comprising a permanent magnet on the inner circumferential surface of a motor casing. The shaft extends from the opening end of the motor casing and has a worm wheel in a gear casing. The end face of the gear casing has an annular projection. The motor casing has an outward flange at the opening end. When the motor casing is connected with the gear casing, an elastic O-ring is fitted between a space formed by the outer circumferential surface of the annular projection, an outer vertical seat face of the gear casing and a corner of the outward flange thereby achieving suitable alignment of the motor casing with the gear casing. The permanent magnet is made of Nd magnet which is pressingly fitted on the inner circumferential surface of the motor casing.Type: ApplicationFiled: December 28, 2007Publication date: May 22, 2008Applicants: IGARASHI ELECTRIC WORKS LTD., MITSUI MININING AND SMELTING CO., LTD.Inventors: Naoto SESITA, Katuyuki TANAKA, Yusuke MIZUKOSHI, Hiroyuki KURIHARA, Yoshihisa WATANABE, Kazuhito YOKOMORI
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Patent number: 7339299Abstract: A motor comprises a rotor fixed to a shaft and a stator comprising a permanent magnet on the inner circumferential surface of a motor casing. The shaft extends from the opening end of the motor casing and has a worm wheel in a gear casing. The end face of the gear casing has an annular projection. The motor casing has an outward flange at the opening end. When the motor casing is connected with the gear casing, an elastic O-ring is fitted between a space formed by the outer circumferential surface of the annular projection, an outer vertical seat face of the gear casing and a corner of the outward flange thereby achieving suitable alignment of the motor casing with the gear casing. The permanent magnet is made of Nd magnet which is pressingly fitted on the inner circumferential surface of the motor casing.Type: GrantFiled: April 25, 2006Date of Patent: March 4, 2008Assignees: Igarashi Electric Works Ltd., Mitsui Mining And Smelting Co., Ltd.Inventors: Naoto Sesita, Katuyuki Tanaka, Yusuke Mizukoshi, Hiroyuki Kurihara, Yoshihisa Watanabe, Kazuhito Yokomori
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Publication number: 20060243078Abstract: A motor shaft puts through a motor casing and a gear casing which are detachably connected to each other. In the motor casing, a rotor is fixed to the motor shaft, while a stator is fixed on the inner circumferential surface of the motor casing. The motor shaft has a worm which engages with a worm wheel in the gear casing. A collar in which the motor shaft is pressingly fitted is provided in the middle of the motor shaft at the end of the gear casing. The motor shaft is supported at each end of the worm in the gear casing.Type: ApplicationFiled: April 19, 2006Publication date: November 2, 2006Inventors: Naoto Sesita, Katuyuki Tanaka, Yusuke Mizukoshi, Hiroyuki Kurihara, Yoshihisa Watanabe
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Publication number: 20060238048Abstract: A motor comprises a rotor fixed to a shaft and a stator comprising a permanent magnet on the inner circumferential surface of a motor casing. The shaft extends from the opening end of the motor casing and has a worm wheel in a gear casing. The end face of the gear casing has an annular projection. The motor casing has an outward flange at the opening end. When the motor casing is connected with the gear casing, an elastic O-ring is fitted between a space formed by the outer circumferential surface of the annular projection, an outer vertical seat face of the gear casing and a corner of the outward flange thereby achieving suitable alignment of the motor casing with the gear casing. The permanent magnet is made of Nd magnet which is pressingly fitted on the inner circumferential surface of the motor casing.Type: ApplicationFiled: April 25, 2006Publication date: October 26, 2006Inventors: Naoto Sesita, Katuyuki Tanaka, Yusuke Mizukoshi, Hiroyuki Kurihara, Yoshihisa Watanabe, Kazuhito Yokomori
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Publication number: 20060236802Abstract: A rotation control motor comprises a shaft, an armature having an armature core of which teeth are wound by wires to form coils, a commutator, and a field magnet. The armature core has a plurality of teeth, the commutator has a plurality of commutator segments corresponding to the number of teeth, and the coils comprise a normal coil and a brake coil. When the motor rotates faster than expected, the brake coil brakes the motor by magnetic flux, and the motor can rotate within a stable speed range.Type: ApplicationFiled: April 21, 2006Publication date: October 26, 2006Inventors: NAOTO SESITA, KATUYUKI TANAKA, YUSUKE MIZUKOSHI, HIROYUKI KURIHARA, YOSHIHISA WATANABE
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Publication number: 20060238060Abstract: A motor comprises a yoke as casing, a shaft extending along a center of the yoke, an annular stator fixed to the yoke and an armature fixed to the shaft to rotate with the shaft inside the stator. The armature comprises a plurality of teeth on the outer circumferential surface. A wire is wound on any of the teeth to form a normal coil. Another wire is wound on another of the teeth to form a brake coil that is a short circuit. When the motor rotates much faster, the brake coil produces magnetic flux which acts as load against the rotation of the motor to allow the motor to rotate slower.Type: ApplicationFiled: April 19, 2006Publication date: October 26, 2006Applicants: Igarashi Electric Works Ltd., Mitsui Mining and Smelting Co., Ltd.Inventors: Naoto SESITA, Katuyuki TANAKA, Yusuke MIZUKOSHI, Hiroyuki KURIHARA, Yoshihisa WATANABE, Hiroshi SATO
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Publication number: 20060238051Abstract: An electric motor comprises a motor case having a motor shaft and a gear case assembled with the motor case detachably. The motor shaft comprises a base end, an intermediate portion, and a remote end which are supported by the first, the second and the third bearing devices, respectively. The third bearing device has a slide bearing, a cap, an adjusting screw, and a lock nut. The adjusting screw stabilizes an axial clearance of the motor shaft. The slide bearing is engaged in a larger diameter bore of a shaft bore.Type: ApplicationFiled: May 10, 2006Publication date: October 26, 2006Applicant: Igarashi Electric Works Ltd.Inventors: Naoto Sesita, Katuyuki Tanaka, Yusuke Mizukoshi, Hiroyuki Kurihara, Yoshihisa Watanabe