Patents by Inventor Hiromi Kawarai
Hiromi Kawarai 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: 7855479Abstract: In a noise suppression structure of a blower motor according to the present invention, a noise reduction member is disposed inside of a peripheral wall part of an end bracket member in such a manner that the noise reduction member is located in a position opposite side of the peripheral wall part to which a connector part is provided, a metal terminal member extended from the connector part has an extension part extendedly provided along a bottom surface part of the end bracket member in a circumferential direction thereof, and the extension part of the metal terminal member has a connection part to which the noise reduction member is connected.Type: GrantFiled: January 24, 2007Date of Patent: December 21, 2010Assignees: Calsonic Kansei Corporation, Kitashiba Electric Co., Ltd.Inventors: Hiromi Kawarai, Shigenori Ohira, Eiji Sato
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Publication number: 20090208156Abstract: A bearing structure includes a housing having a bore that penetrates the housing, a rotation shaft inserted into the bore, an annular first metal bearing and an annular second metal bearing, which are provided apart from each other in an axial direction in the bore and rotatably support the rotation shaft, and a ventilation passage provided in the housing. The ventilation passage is formed on the housing-side contact surfaces which are formed on an inner surface of the housing, and bypasses at least one of the first metal bearing and the second metal bearing. Through ventilation passage, a closed area sandwiched between the both first metal bearing and second metal bearing inside the bore communicates with an outside area.Type: ApplicationFiled: February 12, 2009Publication date: August 20, 2009Inventors: Narihito Sano, Shigenori Ohira, Kazunori Yamada, Hiromi Kawarai, Katsuyoshi Kawachi
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Publication number: 20090191070Abstract: A motor-operated fan apparatus is made up of a brushless motor and a centrifugal fan. The brushless motor has: a rotary shaft vertically disposed on a substrate in a rotatable manner; a stator disposed coaxially with the rotary shaft; and a rotor integrally disposed on the rotary shaft. The centrifugal fan has: a disk part which covers the brushless motor and is fixed to the rotary shaft; and a multiplicity of vane parts which are disposed so as to be elongated from an outer edge of the disk part. A ventilation control member is provided in a space between the rotor and the disk part to block the air flowing from the substrate side to the space between the rotor and the disk part.Type: ApplicationFiled: January 22, 2009Publication date: July 30, 2009Inventors: Katsuyoshi Kawachi, Shiro Nakamura, Shigenori Ohira, Kazunori Yamada, Hiromi Kawarai, Narihito Sano
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Publication number: 20070170789Abstract: In a noise suppression structure of a blower motor according to the present invention, a noise reduction member is disposed inside of a peripheral wall part of an end bracket member in such a manner that the noise reduction member is located in a position opposite side of the peripheral wall part to which a connector part is provided, a metal terminal member extended from the connector part has an extension part extendedly provided along a bottom surface part of the end bracket member in a circumferential direction thereof, and the extension part of the metal terminal member has a connection part to which the noise reduction member is connected.Type: ApplicationFiled: January 24, 2007Publication date: July 26, 2007Inventors: Hiromi Kawarai, Shigenori Ohira, Eiji Sato
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Patent number: 6737770Abstract: A brushless motor for a blower fan unit has a circuit structure constituted by a drive control circuit and a fuse member. The drive control circuit supplying drive current comprises a first circuit section for eliminating surges of electric power and a second circuit section for controlling magnetic field generated by the stator. The first and second circuit sections are three-dimensionally arranged with a predetermined space therebetween. The fuse member electrically connects the first and second circuit sections. An end portion of the fuse member is welded with the first circuit section, and the other end portion of the fuse member is soldered with the second circuit section. The fuse member cuts an electrical connection between the first and second circuit sections when a temperature of solder becomes higher than a predetermined temperature.Type: GrantFiled: January 11, 2002Date of Patent: May 18, 2004Assignee: Calsonic Kansei CorporationInventors: Hideki Sunaga, Takeshi Ohba, Hiromi Kawarai, Kazunori Yamada, Narihito Sano
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Patent number: 6617719Abstract: A brushless motor includes a circuit protecting case, a holder disposed on the case, a motor shaft rotatably held by the holder, a stator disposed about the holder, a yoke fixed to the motor shaft to rotate therewith, permanent magnets held by the yoke, and a circuit substrate held in the circuit protecting case. The stator includes a plurality of coils which surround the motor shaft. The circuit substrate contains a drive circuit and a control section. The drive circuit includes a switching section which switches the current path directed to the coils of the stator. A partition wall, provided in the circuit protection case, partitions the interior of the case into a first chamber and a second chamber.Type: GrantFiled: February 12, 2001Date of Patent: September 9, 2003Assignee: Calsonic Kansei CorporationInventors: Hideki Sunaga, Takeshi Ohba, Kazunori Yamada, Katsuhiro Machida, Hiromi Kawarai, Yoshinori Asayama
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Publication number: 20020093259Abstract: A brushless motor for a blower fan unit has a circuit structure constituted by a drive control circuit and a fuse member. The drive control circuit supplying drive current comprises a first circuit section for eliminating surges of electric power and a second circuit section for controlling magnetic field generated by the stator. The first and second circuit sections are three-dimensionally arranged with a predetermined space therebetween. The fuse member electrically connects the first and second circuit sections. An end portion of the fuse member is welded with the first circuit section, and the other end portion of the fuse member is soldered with the second circuit section. The fuse member cuts an electrical connection between the first and second circuit sections when a temperature of solder becomes higher than a predetermined temperature.Type: ApplicationFiled: January 11, 2002Publication date: July 18, 2002Applicant: CALSONIC KANSEI CORPORATIONInventors: Hideki Sunaga, Takeshi Ohba, Hiromi Kawarai, Kazunori Yamada, Narihito Sano
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Publication number: 20020053843Abstract: A brushless motor comprises a circuit protecting case; a holder disposed on the case; a motor shaft rotatably held by the holder; a stator disposed about the holder and including a plurality of coils which surround the motor shaft; a yoke fixed to the motor shaft to rotate therewith and covering the stator with a given space therebetween; permanent magnets held by the yoke; a circuit substrate tightly held in the circuit protecting case; a drive circuit arranged on the circuit substrate, the drive circuit including a switching section which switches the path of current directed to the coils of the stator and a control section which controls a switching timing of the switching section, the switching section including a plurality of switching elements which generate a certain heat when operated.Type: ApplicationFiled: February 12, 2001Publication date: May 9, 2002Applicant: CALSONIC KANSEI CORPORATIONInventors: Hideki Sunaga, Takeshi Ohba, Kazunori Yamada, Katsuhiro Machida, Hiromi Kawarai, Yoshinori Asayama
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Patent number: 6236126Abstract: A brushless motor comprises a parts protecting case; a drive shaft rotatable about its axis relative to the parts protecting case; a fixed housing for rotatably holding therein the drive shaft; a stator tightly held by the fixed housing; a shock absorbing unit interposed between the fixed housing and the parts protecting case to suppress transmission of vibration of the fixed housing to the parts protecting case; a yoke connected to the drive shaft to rotate therewith; and a plurality of magnets held by the yoke. The yoke has a vibration damping structure to suppress or at least minimize transmission of vibration of the yoke to the drive shaft.Type: GrantFiled: February 11, 2000Date of Patent: May 22, 2001Assignee: Calsonic Kansei CorporationInventors: Yoshihiro Yagi, Hiromi Kawarai, Setsuya Uchino, Hideki Sunaga, Shigenori Ohira