Patents by Inventor Taro Tanno
Taro Tanno 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: 20230155467Abstract: A single-phase brushless DC motor includes a rotor rotatable about a central axis, a stator including salient pole portions, a stator core including a slot between the salient pole portions, and a winding wound around the salient pole portions, the stator opposing the rotor with an air gap interposed therebetween, and a substrate fixed to the stator and including a driver to perform energization control of the winding. The driver includes a Hall element to acquire a timing of the energization control. The substrate includes a Hall IC to detect a circumferential position of the rotor separately from the driver.Type: ApplicationFiled: March 9, 2021Publication date: May 18, 2023Inventors: Hideaki ITO, Taro TANNO
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Publication number: 20190186495Abstract: A blower includes a motor and an impeller. The motor includes a rotor cup that includes a first cylindrical portion that has a cylindrical shape and that holds the rotor magnet. The impeller includes an impeller cup including a cylindrical second cylindrical portion that surrounds the first cylindrical portion on an outer side of the rotor cup in the radial direction, and blade portions on a radial-direction outer surface of the second cylindrical portion. The rotor cup includes a flange portion that protrudes outward in the radial direction from a lower portion of the first cylindrical portion. Of the flange portion and the impeller cup, one includes a first hole portion recessed in an axial direction, and the other includes a first protruding portion at least partially located inside the first hole portion.Type: ApplicationFiled: June 23, 2017Publication date: June 20, 2019Applicant: NIDEC SERVO CORPORATIONInventors: Takahiro BAMBA, Taro TANNO, Yoshihiko KATO
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Patent number: 8753086Abstract: An impeller includes a substantially cylindrical cup portion arranged to rotate about a center axis, a plurality of blades fixed to an outer circumferential surface of the cup portion for unitary rotation with the cup portion to draw air from one axial side and discharge the air to the other axial side, and an annular connector portion arranged to interconnect the blades. The connector portion has a substantially cylindrical shape in a position spaced apart about 70% to about 90% of the radial length of the blades from the base of each of the blades on the outer circumferential surface of the cup portion, and the ratio of a total axial height of the connector portion to a total radial gap between the outer circumferential surface of the cup portion and the inner circumferential surface of the connector portion is equal to or smaller than about 0.9.Type: GrantFiled: February 14, 2011Date of Patent: June 17, 2014Assignee: Nidec Servo CorporationInventors: Asahi Higo, Seung-Sin Yoo, Osamu Sekiguchi, Taro Tanno
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Patent number: 8317478Abstract: An impeller, a fan apparatus, and a method of manufacturing the impeller are provided. The impeller includes a support portion, a plurality of rotor blades, and a joining member. The joining member is a substantially annular member provided to strengthen the rotor blades against influence of a centrifugal force, and extends in a circumferential direction along a circle centered on a central axis so as to join the rotor blades to one another. In each of the rotor blades, a point of intersection of a leading edge of the rotor blade with a radially outer end of the rotor blade is positioned forward, with respect to a rotation direction, relative to a point of intersection of the leading edge with an outside surface of the support portion. The joining member is positioned radially inwards of the radially outer end of each of the rotor blades.Type: GrantFiled: September 30, 2009Date of Patent: November 27, 2012Assignee: Nidec Servo CorporationInventors: Asahi Higo, Tetsuya Hioki, Taro Tanno, Mitsuru Ito, Osamu Sekiguchi, Seung-Sin Yoo
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Publication number: 20110200429Abstract: An impeller includes a substantially cylindrical cup portion arranged to rotate about a center axis, a plurality of blades fixed to an outer circumferential surface of the cup portion for unitary rotation with the cup portion to draw air from one axial side and discharge the air to the other axial side, and an annular connector portion arranged to interconnect the blades. The connector portion has a substantially cylindrical shape in a position spaced apart about 70% to about 90% of the radial length of the blades from the base of each of the blades on the outer circumferential surface of the cup portion, and the ratio of a total axial height of the connector portion to a total radial gap between the outer circumferential surface of the cup portion and the inner circumferential surface of the connector portion is equal to or smaller than about 0.9.Type: ApplicationFiled: February 14, 2011Publication date: August 18, 2011Applicant: NIDEC SERVO CORPORATIONInventors: Asahi HIGO, Seung-Sin YOO, Osamu SEKIGUCHI, Taro TANNO
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Patent number: 7946824Abstract: In an axial flow fan, a line extending from a center axis and passing a corner where a following edge and a radially outer edge of a blade of an impeller meet is arranged forwardly in a rotational direction from an another corner where a leading edge of the blade and a radially outer surface of a hub meet. Furthermore, a camber ratio of the blade, which is minimum at a joint with the hub across the blade, monotonically increases to be maximum at the radially outer edge of the blade.Type: GrantFiled: October 31, 2007Date of Patent: May 24, 2011Assignee: Nidec Servo Co., Ltd.Inventors: Taku Iwase, Masanori Watabe, Osamu Sekiguchi, Tetsuya Hioki, Taro Tanno, Motoi Jin, Yoshihiko Kato
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Patent number: 7737589Abstract: A motor includes a rotor portion including a shaft and a rotor magnet rotatable about a center axis, an armature arranged opposite to the rotor magnet to generate a torque therebetween, a circuit board arranged below the armature in an axial direction substantially parallel to the center axis and including a control circuit controlling rotation of the rotor portion, and a base portion including a bearing holder which supports the armature on its outer side surface and the shaft on its inner side surface via a bearing member. The armature is pressed against the bearing holder in the axial direction with an elastic member.Type: GrantFiled: March 3, 2008Date of Patent: June 15, 2010Assignee: Nidec Servo CorporationInventors: Osamu Sekiguchi, Taro Tanno, Yoshihiko Kato, Tetsuya Hioki, Asahi Higo
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Publication number: 20100086405Abstract: An impeller, a fan apparatus, and a method of manufacturing the impeller are provided. The impeller includes a support portion, a plurality of rotor blades, and a joining member. The joining member is a substantially annular member provided to strengthen the rotor blades against influence of a centrifugal force, and extends in a circumferential direction along a circle centered on a central axis so as to join the rotor blades to one another. In each of the rotor blades, a point of intersection of a leading edge of the rotor blade with a radially outer end of the rotor blade is positioned forward, with respect to a rotation direction, relative to a point of intersection of the leading edge with an outside surface of the support portion. The joining member is positioned radially inwards of the radially outer end of each of the rotor blades.Type: ApplicationFiled: September 30, 2009Publication date: April 8, 2010Applicant: Nidec Servo CorporationInventors: Asahi HIGO, Tetsuya HIOKI, Taro TANNO, Mitsuru ITO, Osamu SEKIGUCHI, Seung-Sin YOO
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Patent number: 7622838Abstract: An axial fan motor comprising: a fan having a rotating shaft and composed of a hub and a plurality of vanes provided around the hub, the fan rotating to generate an air flow; a stator substrate set comprising a stator core, which drives the fan, an insulator, and a substrate; and a venturi having a sleeve, into an inner peripheral side of which a bearing is inserted to support the rotating shaft and to an outer peripheral side of which the stator core is fixed, the venturi being formed on one side thereof with an air suction opening and on the other side thereof with an air discharge mouth, wherein a space is provided between the stator core and the sleeve.Type: GrantFiled: April 9, 2007Date of Patent: November 24, 2009Assignee: Japan Servo Co., Ltd.Inventors: Masanori Watanabe, Taku Iwase, Osamu Sekiguchi, Taro Tanno, Yoshihiko Kato, Tetsuya Hioki
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Patent number: 7470108Abstract: In an axial flow fan, for reducing fluid noise and further reducing the noise by suppressing solid-conveyed noise (structure-borne noise) generated by the vibration of an electric motor or the like, the axial flow fan is equipped with a propeller, a motor for driving the propeller, and a venturi portion disposed on the outer circumference side of the propeller and provided on its inner circumferential side with a bellmouth through which an air flow generated by the revolution of the propeller passes, wherein the bellmouth has an intake portion whose diameter contracts in a curved shape in the direction of the air flow, a cylindrical portion having a cylindrical shape, and a discharge portion whose diameter slantingly expands in the direction of the air flow.Type: GrantFiled: April 20, 2005Date of Patent: December 30, 2008Assignee: Japan Servo Co., Ltd.Inventors: Masanori Watanabe, Taku Iwase, Shouichi Kawamata, Osamu Sekiguchi, Taro Tanno
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Publication number: 20080157634Abstract: A motor includes a rotor portion including a shaft and a rotor magnet rotatable about a center axis, an armature arranged opposite to the rotor magnet to generate a torque therebetween, a circuit board arranged below the armature in an axial direction substantially parallel to the center axis and including a control circuit controlling rotation of the rotor portion, and a base portion including a bearing holder which supports the armature on its outer side surface and the shaft on its inner side surface via a bearing member. The armature is pressed against the bearing holder in the axial direction with an elastic member.Type: ApplicationFiled: March 3, 2008Publication date: July 3, 2008Applicant: JAPAN SERVO CO., LTD.Inventors: Osamu SEKIGUCHI, Taro TANNO, Yoshihiko KATO, Tetsuya HIOKI, Asahi HIGO
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Publication number: 20080101964Abstract: In an axial flow fan, a line extending from a center axis and passing a corner where a following edge and a radially outer edge of a blade of an impeller meet is arranged forwardly in a rotational direction from an another corner where a leading edge of the blade and a radially outer surface of a hub meet. Furthermore, a camber ratio of the blade, which is minimum at a joint with the hub across the blade, monotonically increases to be maximum at the radially outer edge of the blade.Type: ApplicationFiled: October 31, 2007Publication date: May 1, 2008Applicant: JAPAN SERVO CO., LTD.Inventors: Taku IWASE, Masanori WATABE, Osamu SEKIGUCHI, Tetsuya HIOKI, Taro TANNO, Motoi JIN, Yoshihiko KATO
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Publication number: 20070241643Abstract: An axial fan motor comprising: a fan having a rotating shaft and composed of a hub and a plurality of vanes provided around the hub, the fan rotating to generate an air flow; a stator substrate set comprising a stator core, which drives the fan, an insulator, and a substrate; and a venturi having a sleeve, into an inner peripheral side of which a bearing is inserted to support the rotating shaft and to an outer peripheral side of which the stator core is fixed, the venturi being formed on one side thereof with an air suction opening and on the other side thereof with an air discharge mouth, wherein a space is provided between the stator core and the sleeve.Type: ApplicationFiled: April 9, 2007Publication date: October 18, 2007Inventors: Masanori Watanabe, Taku Iwase, Osamu Sekiguchi, Taro Tanno, Yoshihiko Kato, Tetsuya Hioki
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Patent number: 7029229Abstract: An axial flow fan of high efficiency and low noise level is provided. The fan includes a motor, an impeller having a plurality of blades around a hub fitted to the motor, and a fan casing having an air inlet on one side and an air outlet on the other, wherein a radial position with a maximum setting angle in a blade section, and a radial position with a contour of a leading edge portion in a fluid flowing direction forming a projecting apex in the flowing direction are located between 60% and 80% of the outside diameter of the impeller.Type: GrantFiled: May 7, 2004Date of Patent: April 18, 2006Assignees: Hitachi, Ltd., Japan Servo Co., Ltd.Inventors: Taku Iwase, Kazuyuki Sugimura, Taro Tanno
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Publication number: 20050232765Abstract: In an axial flow fan, for reducing fluid noise and further reducing the noise by suppressing solid-conveyed noise (structure-bone noise) generated by the vibration of an electric motor or the like, the axial flow fan is equipped with a propeller, a motor for driving the propeller, and a venturi portion disposed on the outer circumference side of the propeller and provided on its inner circumferential side with a bellmouth through which an air flow generated by the revolution of the propeller passes, wherein the bellmouth has an intake portion whose diameter contracts in a curved shape in the direction of the air flow, a cylindrical portion having a cylindrical shape, and a discharge portion whose diameter slantingly expands in the direction of the air flow.Type: ApplicationFiled: April 20, 2005Publication date: October 20, 2005Inventors: Masanori Watanabe, Taku Iwase, Shouichi Kawamata, Osamu Sekiguchi, Taro Tanno
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Publication number: 20040253103Abstract: An axial flow fan of high efficiency and low noise level is provided. The fan includes a motor, an impeller having a plurality of blades around a hub fitted to the motor, and a fan casing having an air inlet on one side and an air outlet on the other, wherein a radial position with a maximum setting angle in a blade section, and a radial position with a contour of a leading edge portion in a fluid flowing direction forming a projecting apex in the flowing direction are located between 60% and 80% of the outside diameter of the impeller.Type: ApplicationFiled: May 7, 2004Publication date: December 16, 2004Inventors: Taku Iwase, Kazuyuki Sugimura, Taro Tanno
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Patent number: D564653Type: GrantFiled: February 20, 2007Date of Patent: March 18, 2008Assignee: Japan Servo Co., Ltd.Inventors: Taku Iwase, Masanori Watanabe, Tetsuya Hioki, Osamu Sekiguchi, Taro Tanno, Yoshihiko Katou
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Patent number: D570471Type: GrantFiled: February 20, 2007Date of Patent: June 3, 2008Assignee: Japan Servo Co., Ltd.Inventors: Taku Iwase, Masanori Watanabe, Tetsuya Hioki, Osamu Sekiguchi, Taro Tanno, Yoshihiko Katou