Patents by Inventor Teiichi Hirono
Teiichi Hirono 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: 20130004351Abstract: 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: June 14, 2012Publication date: January 3, 2013Applicant: NIDEC CORPORATIONInventors: Teiichi Hirono, Shinichiro Noda, Yoshiharu Ikegami, Tomohiro Hasegawa, Tomohiro Yoneda, Shunji Matsumoto, Seungsin Yoo, Kouta Kabune
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Publication number: 20130004348Abstract: A dynamic pressure bearing apparatus includes a bearing portion; a shaft; a substantially annular bushing; a radial dynamic pressure bearing portion; and a seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the bushing. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.Type: ApplicationFiled: June 14, 2012Publication date: January 3, 2013Applicant: NIDEC CORPORATIONInventors: Tomotsugu Sugiyama, Teiichi Hirono, Shinichiro Noda, Akihiro Kimura, Yoshiharu Ikegami, Tomohiro Hasegawa, Masafumi Fujimoto, Tomohiro Yoneda
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Publication number: 20130003223Abstract: In a bearing apparatus, a first cup portion defining a portion of a stationary portion of a bearing apparatus includes a circular plate portion and a cylindrical portion projecting downward from an outer edge portion of the circular plate portion. A rotating portion of the bearing apparatus includes an annular recessed portion arranged to accommodate at least a lower end portion of the cylindrical portion. Accordingly, it is possible to limit the axial dimension of the bearing apparatus while also enabling a radial dynamic pressure groove array. Additionally, one end of a through hole defined in the rotating portion is arranged to open into the annular recessed portion.Type: ApplicationFiled: September 4, 2012Publication date: January 3, 2013Applicant: NIDEC CORPORATIONInventors: Akihiro KIMURA, Teiichi HIRONO, Kunio SAKURADA, Kyoko HORISE
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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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Publication number: 20120326543Abstract: A bearing apparatus includes a stationary shaft, a first annular member, and a rotating member. The rotating member includes a first inner circumferential surface arranged opposite to the outer circumferential surface of the stationary shaft, and a second inner circumferential surface arranged opposite to an outer circumferential surface of the first annular member. A lubricating oil is arranged in a gap between a surface of a stationary member and the rotating member. On an upper side of an upper surface of the lubricating oil, the first annular member and the rotating member are arranged radially opposite to each other with a slight gap defined therebetween, so that a labyrinth seal is defined. The labyrinth seal and a fixing range over which the stationary shaft and the first annular member are fixed to each other are arranged to overlap with each other in a radial direction.Type: ApplicationFiled: September 4, 2012Publication date: December 27, 2012Applicant: Nidec CorporationInventors: Akihiro KIMURA, Teiichi HIRONO, Kunio SAKURADA, Kyoko HORISE, Takehito TAMAOKA, Kazuhiro SATO, Yoichi SEKII
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Patent number: 8337086Abstract: A bearing apparatus includes a shaft, a thrust cup including an annular potion and a cylindrical portion, a rotating member including a through hole defined therein, and a lubricating oil. A second gap defined between a lower surface of the rotating member and an upper surface of the annular portion of the thrust cup includes a first region in communication with a capillary seal portion, and a second region positioned radially inward of the first region and having an axial dimension smaller than that of the first region. A lower end portion of the through hole is open at a location radially outwardly away from a boundary between the first and second regions, so that a local circulation of the lubricating oil arises within the first region during rotation of the rotating member.Type: GrantFiled: June 4, 2010Date of Patent: December 25, 2012Assignee: Nidec CorporationInventors: Takayuki Oe, Teiichi Hirono, Kunio Sakurada, Junya Mizukami
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Patent number: 8277125Abstract: In a bearing apparatus, a first cup portion defining a portion of a stationary portion of a bearing apparatus includes a circular plate portion and a cylindrical portion projecting downward from an outer edge portion of the circular plate portion. A rotating portion of the bearing apparatus includes an annular recessed portion arranged to accommodate at least a lower end portion of the cylindrical portion. Accordingly, it is possible to limit the axial dimension of the bearing apparatus while also enabling both a radial dynamic pressure groove array and a pumping groove array to have a sufficient axial dimension. Additionally, one end of a through hole defined in the rotating portion is arranged to open into the annular recessed portion, so that any air bubbles introduced into a lubricating oil by the pumping groove array can be efficiently caused to flow downward through the through hole and out of the bearing apparatus.Type: GrantFiled: June 1, 2010Date of Patent: October 2, 2012Assignee: Nidec CorporationInventors: Akihiro Kimura, Teiichi Hirono, Kunio Sakurada, Kyoko Horise
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Publication number: 20110123139Abstract: A dynamic pressure bearing has a reduced axial dimension and is constructed to ensure smooth feeding of a lubricating oil. The dynamic pressure bearing includes a communicating hole and at least one tapered seal, and is constructed such that an opening angle of one of the at least one tapered seal through which oil feeding is possible is in a range of about 30 degrees inclusive to about 180 degrees exclusive, a tapered seal wall surface depth W1 of the tapered seal is about 0.3 mm or more, and a sum of distances over which the lubricating oil travels from both sides of an end portion of the communicating hole in a cross-section beyond a wall surface of the communicating hole along a wall surface opposite the end portion of the communicating hole exceeds an inside diameter of the communicating hole.Type: ApplicationFiled: November 23, 2010Publication date: May 26, 2011Applicant: NIDEC CORPORATIONInventors: Akihiro KIMURA, Kyoko HORISE, Ryota OGINO, Kunio SAKURADA, Teiichi HIRONO
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Publication number: 20100321823Abstract: A bearing apparatus includes a shaft, a thrust cup including an annular potion and a cylindrical portion, a rotating member including a through hole defined therein, and a lubricating oil. A second gap defined between a lower surface of the rotating member and an upper surface of the annular portion of the thrust cup includes a first region in communication with a capillary seal portion, and a second region positioned radially inward of the first region and having an axial dimension smaller than that of the first region. A lower end portion of the through hole is open at a location radially outwardly away from a boundary between the first and second regions, so that a local circulation of the lubricating oil arises within the first region during rotation of the rotating member.Type: ApplicationFiled: June 4, 2010Publication date: December 23, 2010Applicant: NIDEC CORPORATIONInventors: Takayuki OE, Teiichi HIRONO, Kunio SAKURADA, Junya MIZUKAMI
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Publication number: 20100315742Abstract: In a bearing apparatus, a first cup portion defining a portion of a stationary portion of a bearing apparatus includes a circular plate portion and a cylindrical portion projecting downward from an outer edge portion of the circular plate portion. A rotating portion of the bearing apparatus includes an annular recessed portion arranged to accommodate at least a lower end portion of the cylindrical portion. Accordingly, it is possible to limit the axial dimension of the bearing apparatus while also enabling both a radial dynamic pressure groove array and a pumping groove array to have a sufficient axial dimension. Additionally, one end of a through hole defined in the rotating portion is arranged to open into the annular recessed portion, so that any air bubbles introduced into a lubricating oil by the pumping groove array can be efficiently caused to flow downward through the through hole and out of the bearing apparatus.Type: ApplicationFiled: June 1, 2010Publication date: December 16, 2010Applicant: Nidec CorporationInventors: Akihiro KIMURA, Teiichi HIRONO, Kunio SAKURADA, Kyoko HORISE