Patents by Inventor Munenori Takakuwa
Munenori Takakuwa 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: 12006943Abstract: A waterproof fan includes: a rotor including a rotating blade capable of rotating about a rotation axis; a stator including a plurality of stator cores extending in a radial direction relative to the rotation axis, and a winding wound around each of the stator cores; a frame including a housing space opening toward one side of the rotation axis; a circuit board electrically connected to the winding and housed in the housing space; a waterproofing resin portion covering the stator and the circuit board to block the opening of the housing space; and a positioning member provided in the housing space and configured to position the circuit board at a position away from an inner wall of the housing space.Type: GrantFiled: April 29, 2022Date of Patent: June 11, 2024Assignee: SANYO DENKI CO., LTD.Inventors: Munenori Takakuwa, Hyukjun Kwon
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Patent number: 11522410Abstract: In this molded structure of the brushless fan motor, at least a part of a circuit board is supported by a notch portion in a distal end portion of a projecting end formed on a board storage portion side and a rotary shaft side of an insulator, the board storage portion and the insulator are placed in such a manner as to surround a periphery of a bearing support tube portion, a part of a molded portion is disposed between the bearing support tube portion and the insulator and between the board storage portion and the insulator, and the entire circuit board located inside a storage chamber, excluding the portion supported by the projecting end formed on the board storage portion side of the insulator, is covered with the part of the molded portion.Type: GrantFiled: March 16, 2020Date of Patent: December 6, 2022Assignee: SANYO DENKI CO., LTD.Inventors: Munenori Takakuwa, Kakuhiko Hata, Yukihiro Nagatsuka
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Publication number: 20220368188Abstract: A waterproof fan includes: a rotor including a rotating blade capable of rotating about a rotation axis; a stator including a plurality of stator cores extending in a radial direction relative to the rotation axis, and a winding wound around each of the stator cores; a frame including a housing space opening toward one side of the rotation axis; a circuit board electrically connected to the winding and housed in the housing space; a waterproofing resin portion covering the stator and the circuit board to block the opening of the housing space; and a positioning member provided in the housing space and configured to position the circuit board at a position away from an inner wall of the housing space.Type: ApplicationFiled: April 29, 2022Publication date: November 17, 2022Inventors: Munenori TAKAKUWA, Hyukjun KWON
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Publication number: 20200303990Abstract: In this molded structure of the brushless fan motor, at least a part of a circuit board is supported by a notch portion in a distal end portion of a projecting end formed on a board storage portion side and a rotary shaft side of an insulator, the board storage portion and the insulator are placed in such a manner as to surround a periphery of a bearing support tube portion, a part of a molded portion is disposed between the bearing support tube portion and the insulator and between the board storage portion and the insulator, and the entire circuit board located inside a storage chamber, excluding the portion supported by the projecting end formed on the board storage portion side of the insulator, is covered with the part of the molded portion.Type: ApplicationFiled: March 16, 2020Publication date: September 24, 2020Inventors: Munenori TAKAKUWA, Kakuhiko HATA, Yukihiro NAGATSUKA
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Patent number: 10465692Abstract: A fan motor is provided that prevents restraint on a rotor in an environment where oil and dust are floating in the air. The fan motor includes a stator constituted of an armature having a winding thereon, a rotor constituted of an excitation unit including a permanent magnet, and a vane wheel fixed to the rotor and including a plurality of vanes. The vanes or the vane wheel are formed so as to generate airflow from the side of a frame boss toward a hub unit of the vane wheel.Type: GrantFiled: April 9, 2014Date of Patent: November 5, 2019Assignee: SANYO DENKI CO., LTD.Inventors: Naruhiko Kudo, Munenori Takakuwa, Tatsuya Midorikawa
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Publication number: 20140314596Abstract: A fan motor is provided that prevents restraint on a rotor in an environment where oil and dust are floating in the air. The fan motor includes a stator constituted of an armature having a winding thereon, a rotor constituted of an excitation unit including a permanent magnet, and a vane wheel fixed to the rotor and including a plurality of vanes. The vanes or the vane wheel are formed so as to generate airflow from the side of a frame boss toward a hub unit of the vane wheel.Type: ApplicationFiled: April 9, 2014Publication date: October 23, 2014Applicant: SANYO DENKI CO., LTD.Inventors: Naruhiko Kudo, Munenori Takakuwa, Tatsuya Midorikawa
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Publication number: 20140169969Abstract: The present invention provides an axial flow fan having conductive pins, each of which is configured to electrically connect a coil of a stator and a circuit board, and to hold a film conductor of the coil. In the conductive pin, one end is fixed to an electrical insulator covering a core stack of the stator, and the other end is electrically connected to the circuit board. The conductive pin is a quadrangular prism pin as a basic configuration and has, in at least a part of a portion exposed from the electrical insulator, a reduced diameter portion having no corners.Type: ApplicationFiled: December 16, 2013Publication date: June 19, 2014Applicant: SANYO DENKI CO., LTD.Inventors: Munenori Takakuwa, MITSUTAKA KUBOTA
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Publication number: 20050254799Abstract: A brushless DC fan motor capable of communicating with an external apparatus while simplifying the circuitry. A speed control command generator, which generates a command for controlling the rotational speed of the rotor, include a microcomputer (9a) capable of bi-directional communication with an external apparatus (1) by serial communication based on a predetermined communication protocol. The microcomputer (9a) operates the speed control command based on control conditions transmitted from the external apparatus (1) and a signal indicative of the rotational speed and/or the exciting current detected by a speed detector (13) and/or a current detector (15) incorporated in the brushless DC fan motor (1). A drive circuit (7) controls the exciting current by PWM control according to an optimal speed control command.Type: ApplicationFiled: September 30, 2003Publication date: November 17, 2005Applicant: Sanyo Denki Co., Ltd.Inventors: Masato Murara, Naruhiko Kudou, Munenori Takakuwa
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Patent number: 6700262Abstract: A rotary electric machine such as a fan motor or the like capable of coupling a bearing holder and an insulator to each other without deteriorating accuracy of a diameter of an inner peripheral surface of the bearing holder on which bearings are held. The bearing holder and insulator are coupled to each other by a coupling structure, which is constituted by at least one recess formed on a forward end of the bearing holder and at least one projection provided on the insulator and tightly fitted in the recess. The projection and recess thus fitted together are concurrently heated at a peripheral portion thereof for deformation, resulting in being coupled to each other.Type: GrantFiled: August 30, 2001Date of Patent: March 2, 2004Assignee: Sanyo Denki Co., Ltd.Inventors: Honami Osawa, Munenori Takakuwa, Ryuji Kobayashi, Yukio Ouchi
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Publication number: 20020047397Abstract: A rotary electric machine such as a fan motor or the like capable of coupling a bearing holder and an insulator to each other without deteriorating accuracy of a diameter of an inner peripheral surface of the bearing holder on which bearings are held. The bearing holder and insulator are coupled to each other by a coupling structure, which is constituted by at least one recess formed on a forward end of the bearing holder and at least one projection provided on the insulator and tightly fitted in the recess. The projection and recess thus fitted together are concurrently heated at a peripheral portion thereof for deformation, resulting in being coupled to each other.Type: ApplicationFiled: August 30, 2001Publication date: April 25, 2002Inventors: Honami Osawa, Munenori Takakuwa, Ryuji Kobayashi, Yukio Ouchi