Patents by Inventor Kiyoto Ida
Kiyoto Ida 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: 20190195231Abstract: A centrifugal fan includes a motor, an impeller, and a housing. The motor includes a rotary portion that rotates about a vertical center axis. The impeller is fixed to and rotates together with the rotary portion. The housing accommodates the motor and impeller. The rotary portion includes a rotor holder with a magnet. The impeller includes circumferentially disposed blades and a blade support. The blade support supports the blades on an outer side. The housing includes an inlet port axially penetrating an upper surface and an outlet port radially penetrating a side surface. At least a portion of an inner surface of the blade support radially faces an outer surface of the rotor holder with a gap therebetween containing adhesive at least partially. At least one of the outer surface of the rotor holder and the inner surface of the blade support includes a radially recessed portion containing adhesive.Type: ApplicationFiled: November 29, 2018Publication date: June 27, 2019Inventors: Kiyoto IDA, Masashi HIRAYAMA, Takehito TAMAOKA
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Publication number: 20190195235Abstract: A centrifugal fan includes a motor, an impeller, and a housing. The motor includes a rotary portion that rotates about a vertical center axis. The impeller is fixed to and rotates together with the rotary portion. The housing accommodates the motor and impeller. The rotary portion includes a rotor holder with a magnet. The impeller includes circumferentially disposed blades and a blade support portion that supports the blades on an outer side. The housing includes an inlet port axially penetrating an upper surface of the housing and an outlet port radially penetrating a side surface of the housing. The blade support portion includes an accommodating portion that opens upward and that accommodates a balance adjustment member. The accommodating portion is disposed on a radial-direction inner side of the blades and between an upper end and a lower end of the blades in an axial direction.Type: ApplicationFiled: December 7, 2018Publication date: June 27, 2019Inventors: Kiyoto IDA, Masashi HIRAYAMA, Takehito TAMAOKA
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Patent number: 10068833Abstract: A heat module includes a fan, a heat sink, a heat transfer member, and a plurality of connection portions. The heat transfer member includes a lower surface capable of being in thermal contact with a heat source, and an upper surface thermally connected to the heat sink, and is arranged to overlap with at least a portion of the fan in a plan view. The plurality of connection portions are arranged between the heat transfer member and the housing to define an axial gap between an upper surface of the heat transfer member and a lower surface of the lower plate portion. The heat transfer member includes a heat source contact portion arranged on a side, closer to the fan, of an end portion of the fan at which the air outlet is defined.Type: GrantFiled: May 12, 2015Date of Patent: September 4, 2018Assignee: NIDEC CORPORATIONInventors: Takehito Tamaoka, Koji Hatanaka, Kiyoto Ida
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Patent number: 9605682Abstract: There is provided a blower fan including a motor. In its bearing apparatus, the inner circumferential surface of the rotor cylindrical portion 222b and the outer circumferential surface of the bearing portion are arranged to together define a seal gap 35. The bushing 26 includes a bushing base portion 260 and a bushing cylindrical portion 262. The inner circumferential surface of the bushing cylindrical portion 262 and the outer circumferential surface of the rotor cylindrical portion 222b are arranged to together define a vertical gap. The vertical gap is arranged to have a minimum radial width equal to or smaller than a maximum width of the seal gap. A lower end portion of the rotor raised portion 514 and an upper end portion of the bushing cylindrical portion 262 are arranged to together define a second horizontal gap 266a.Type: GrantFiled: October 20, 2015Date of Patent: March 28, 2017Assignee: NIDEC CORPORATIONInventors: Tomohiro Hasegawa, Shunji Matsumoto, Takahiro Kikuichi, Mitsuhito Nishio, Noriaki Yamada, Satoru Otsu, Hiroyoshi Teshima, Kiyoto Ida
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Patent number: 9341214Abstract: A porous oil-impregnated sleeve is used for a fluid dynamic pressure bearing. The sleeve includes an inner surface, a first axial end face, a first recessed portion, and a first dynamic pressure generating groove. The first recessed portion is positioned on the other side of a line segment, which connects one-side end portion of the inner surface with an inner end portion of the first axial end face, in a cross-section including the central axis. A bottom portion of the first recessed portion, which has the longest distance between itself and the line segment, is positioned closer to the other side than a bottom portion of the first dynamic pressure generating groove in the axial direction.Type: GrantFiled: April 29, 2014Date of Patent: May 17, 2016Assignee: NIDEC CORPORATIONInventors: Takehito Tamaoka, Kiyoto Ida, Masashi Hirayama, Kazuhiko Fukushima
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Publication number: 20160037683Abstract: A heat module includes a fan, a heat sink, a heat transfer member, and a plurality of connection portions. The heat transfer member includes a lower surface capable of being in thermal contact with a heat source, and an upper surface thermally connected to the heat sink, and is arranged to overlap with at least a portion of the fan in a plan view. The plurality of connection portions are arranged between the heat transfer member and the housing to define an axial gap between an upper surface of the heat transfer member and a lower surface of the lower plate portion. The heat transfer member includes a heat source contact portion arranged on a side, closer to the fan, of an end portion of the fan at which the air outlet is defined.Type: ApplicationFiled: May 12, 2015Publication date: February 4, 2016Applicant: NIDEC CORPORATIONInventors: Takehito Tamaoka, Koji Hatanaka, Kiyoto Ida
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Publication number: 20160032929Abstract: The second holder member includes a cover portion including, in an inner edge portion thereof, a cover portion cylindrical portion arranged to extend downward; the rotor cylindrical portion includes an annular rotor raised portion arranged to project radially outward from an outer circumferential surface thereof; the second holder member is attached to the first holder member; and a lower end portion of the cover portion cylindrical portion is arranged to be in axial contact with the rotor raised portion.Type: ApplicationFiled: October 20, 2015Publication date: February 4, 2016Applicant: NIDEC CORPORATIONInventors: Tomohiro Hasegawa, Shunji Matsumoto, Takahiro Kikuichi, Mitsuhito Nishio, Noriaki Yamada, Satoru Otsu, Hiroyoshi Teshima, Kiyoto Ida
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Patent number: 9140268Abstract: A bearing apparatus includes a bearing portion; a shaft; an upper thrust portion; a rotor cylindrical portion extending downward from an outer edge portion, and arranged radially outward of the bearing portion; and an annular seal cover fixed to an outer circumferential surface. A seal portion having a surface of lubricating oil defined therein is defined in a seal gap defined between an inner circumferential surface of the rotor cylindrical portion and an outer circumferential surface of the bearing portion. The seal cover includes a fixing portion fixed to the outer circumferential surface of the rotor cylindrical portion; and an inner flange portion extending radially inward from the fixing portion below a lower end portion of the rotor cylindrical portion, and having an inner circumferential portion arranged opposite to the outer circumferential surface of the bearing portion to define a vertical gap together with the outer circumferential surface.Type: GrantFiled: February 14, 2013Date of Patent: September 22, 2015Assignee: NIDEC CORPORATIONInventors: Hiroyoshi Teshima, Kiyoto Ida
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Patent number: 9051938Abstract: A fan includes a motor and an impeller. The motor includes a stationary portion and a rotating portion rotatably supported by the stationary portion. The stationary portion includes a stator and a bearing portion arranged inside of the stator. The rotating portion includes a rotor magnet arranged radially outside the stator; a shaft inserted in the bearing portion, and having an upper portion fixed to the impeller directly or through one or more members; and a thrust portion arranged axially opposite the bearing portion, and including an annular surface arranged around the shaft.Type: GrantFiled: July 2, 2012Date of Patent: June 9, 2015Assignee: NIDEC CORPORATIONInventors: Teiichi Hirono, Shinichiro Noda, Yoshiharu Ikegami, Tomohiro Hasegawa, Tomohiro Yoneda, Shunji Matsumoto, Seungsin Yoo, Kouta Kabune, Kiyoto Ida, Naoki Matsuba, Tatsuya Akase, Takehito Tamaoka, Kazuhiko Fukushima
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Publication number: 20150030268Abstract: A porous oil-impregnated sleeve is used for a fluid dynamic pressure bearing. The sleeve includes an inner surface, a first axial end face, a first recessed portion, and a first dynamic pressure generating groove. The first recessed portion is positioned on the other side of a line segment, which connects one-side end portion of the inner surface with an inner end portion of the first axial end face, in a cross-section including the central axis. A bottom portion of the first recessed portion, which has the longest distance between itself and the line segment, is positioned closer to the other side than a bottom portion of the first dynamic pressure generating groove in the axial direction.Type: ApplicationFiled: April 29, 2014Publication date: January 29, 2015Applicant: NIDEC CORPORATIONInventors: Takehito Tamaoka, Kiyoto Ida, Masashi Hirayama, Kazuhiko Fukushima
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Patent number: 8899946Abstract: A fan includes a motor including a rotating portion and a stationary portion; an impeller including a plurality of blades and a blade support portion to which the blades are fixed, and arranged to cover the motor; and a housing including a lower plate portion arranged on a lower side of the blades, a side wall portion arranged to cover sides of the blades, and an upper plate portion arranged on an upper side of the blades and including an air inlet arranged to extend through the upper plate portion in an axial direction. A lower surface of the blade support portion includes a balance correction portion arranged to extend in a circumferential direction. The lower plate portion includes a through hole arranged to overlap with the balance correction portion in the axial direction to make a portion of the balance correction portion viewable from below the lower plate portion.Type: GrantFiled: April 3, 2012Date of Patent: December 2, 2014Assignee: Nidec CorporationInventors: Hiroyoshi Teshima, Kiyoto Ida
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Publication number: 20130259716Abstract: A bearing apparatus includes a bearing portion; a shaft; an upper thrust portion; a rotor cylindrical portion extending downward from an outer edge portion, and arranged radially outward of the bearing portion; and an annular seal cover fixed to an outer circumferential surface. A seal portion having a surface of lubricating oil defined therein is defined in a seal gap defined between an inner circumferential surface of the rotor cylindrical portion and an outer circumferential surface of the bearing portion. The seal cover includes a fixing portion fixed to the outer circumferential surface of the rotor cylindrical portion; and an inner flange portion extending radially inward from the fixing portion below a lower end portion of the rotor cylindrical portion, and having an inner circumferential portion arranged opposite to the outer circumferential surface of the bearing portion to define a vertical gap together with the outer circumferential surface.Type: ApplicationFiled: February 14, 2013Publication date: October 3, 2013Applicant: NIDEC CORPORATIONInventors: Hiroyoshi Teshima, Kiyoto Ida
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Patent number: 8496447Abstract: In a motor, a bearing housing is made of a thermoplastic resin material. A bottom portion of the bearing housing includes a first large diameter portion, a small diameter portion, and a second large diameter portion. The first large diameter portion of the bearing housing is arranged on an upper surface of the base. An outer circumferential surface of the small diameter portion of the bearing housing is arranged radially opposite a side peripheral surface of a base hole. The second large diameter portion is arranged to be in direct contact with a lower surface of the base through caulking.Type: GrantFiled: December 21, 2010Date of Patent: July 30, 2013Assignee: Nidec CorporationInventors: Kiyoto Ida, Masashi Hirayama, Hiroyoshi Teshima
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Publication number: 20130164158Abstract: A side wall of a centrifugal fan includes a gap expanding portion arranged to gradually expand a gap between an impeller and the side wall from an upstream end toward a downstream end with respect to a rotation direction of a rotating portion. In the centrifugal fan, an electronic component arranging portion of a board is arranged in an area surrounded by the gap expanding portion, the impeller, and an air outlet, and accordingly does not overlap with a motor or the impeller in an axial direction. The electronic component arranging portion is arranged in an area extending, in a circumferential direction about a central axis, from a position 180 degrees upstream from a middle of the air outlet downstream to the middle of the air outlet, that is, in an area where a wind channel has a large width.Type: ApplicationFiled: September 12, 2012Publication date: June 27, 2013Applicant: NIDEC CORPORATIONInventors: Naoki Matsuba, Hiroyoshi Teshima, Kiyoto Ida
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Patent number: 8449191Abstract: A sleeve support portion is arranged to support a sleeve having a rotating shaft inserted therein such that the rotating shaft is rotatable. A plurality of ribs extending in an axial direction is provided on an inner surface of the sleeve support portion. The ribs are preferably spaced from each other in a circumferential direction centered on the rotating shaft, and arranged to make contact with at least a portion of the sleeve. The ribs include a plurality of types of ribs, each type of the ribs having a different axial position of an axial edge, on an axially opening portion side, of a contact surface thereof which is arranged to make contact with the sleeve.Type: GrantFiled: August 17, 2009Date of Patent: May 28, 2013Assignee: Nidec CorporationInventors: Hiroyoshi Teshima, Koji Muraoka, Kiyoto Ida
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Patent number: 8382450Abstract: A centrifugal fan includes a housing including a base, a side wall portion having an air outlet defined therein, and a cover arranged above the side wall portion and having an air inlet defined therein. A circuit board is arranged on an upper surface of the base, and includes a circuit board protruding portion arranged to protrude radially outward of the housing. At least one of electronic components to be mounted on the circuit board is arranged radially outward from an inner circumferential surface of the side wall portion.Type: GrantFiled: May 4, 2010Date of Patent: February 26, 2013Assignee: Nidec CorporationInventors: Kiyoto Ida, Masashi Hirayama, Hiroyoshi Teshima
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Publication number: 20130004114Abstract: A seal cover includes an axially opposing portion arranged to extend radially outward from a outer circumferential surface of a bearing portion, and arranged axially opposite a lower end portion of a rotor cylindrical portion; and a radially opposing portion arranged to extend upward continuously from a axially opposing portion, and arranged opposite to an outer circumferential surface of a rotor cylindrical portion to define a vertical gap together with a rotor cylindrical portion.Type: ApplicationFiled: May 29, 2012Publication date: January 3, 2013Applicant: NIDEC CORPORATIONInventors: Tomohiro HASEGAWA, Shunji MATSUMOTO, Takahiro KIKUICHI, Mitsuhito NISHIO, Noriaki YAMADA, Satoru OTSU, Hiroyoshi TESHIMA, Kiyoto IDA
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Publication number: 20130004304Abstract: A fan includes a motor including a rotating portion and a stationary portion; an impeller including a plurality of blades and a blade support portion to which the blades are fixed, and arranged to cover the motor; and a housing including a lower plate portion arranged on a lower side of the blades, a side wall portion arranged to cover sides of the blades, and an upper plate portion arranged on an upper side of the blades and including an air inlet arranged to extend through the upper plate portion in an axial direction. A lower surface of the blade support portion includes a balance correction portion arranged to extend in a circumferential direction. The lower plate portion includes a through hole arranged to overlap with the balance correction portion in the axial direction to make a portion of the balance correction portion viewable from below the lower plate portion.Type: ApplicationFiled: April 3, 2012Publication date: January 3, 2013Applicant: Nidec CorporationInventors: Hiroyoshi Teshima, Kiyoto Ida
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Publication number: 20130004350Abstract: A fan includes a motor and an impeller. The motor includes a stationary portion and a rotating portion rotatably supported by the stationary portion. The stationary portion includes a stator and a bearing portion arranged inside of the stator. The rotating portion includes a rotor magnet arranged radially outside the stator; a shaft inserted in the bearing portion, and having an upper portion fixed to the impeller directly or through one or more members; and a thrust portion arranged axially opposite the bearing portion, and including an annular surface arranged around the shaft.Type: ApplicationFiled: July 2, 2012Publication date: January 3, 2013Applicant: NIDEC CORPORATIONInventors: Teiichi Hirono, Shinichiro Noda, Yoshiharu Ikegami, Tomohiro Hasegawa, Tomohiro Yoneda, Shunji Matsumoto, Seungsin Yoo, Kouta Kabune, Kiyoto Ida, Naoki Matsuba, Tatsuya Akase, Takehito Tamaoka, Kazuhiko Fukushima
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Patent number: 8016556Abstract: A centrifugal fan includes a motor having an impeller and a housing for accommodating the motor. The housing has a sidewall surrounding an outer circumference of the impeller. An air inlet is formed in the housing and opposed to a center portion of the impeller. An air outlet is formed in the sidewall of the housing and opposed to an outer surface of the impeller. The housing includes a housing body and a housing cover. The housing body has a bottom with the motor secured thereon. The housing cover, formed by a pressed metal member, has an upper part and a cover sidewall extending from the upper part toward the bottom of the housing body and forming at least a part of the sidewall of the housing.Type: GrantFiled: March 12, 2007Date of Patent: September 13, 2011Assignee: Nidec CorporationInventors: Hiroyoshi Teshima, Kazumi Takeshita, Hideaki Konishi, Kiyoto Ida, Tsukasa Takaoka