Patents by Inventor Taketo Nonaka
Taketo Nonaka 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: 8976487Abstract: A rotating device comprises: a hub on which a magnetic recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a shaft configured such that it extends along the rotational axis of the hub; and a chassis arranged such that it faces the magnetic recording disk, and configured to have a Young's modulus that is smaller than that of the base. A base hole is provided to the upper face of the chassis that faces the magnetic recording disk such that it extends along the rotational axis. Furthermore, the base is fitted into the base hole, thereby fixedly mounting the base on the chassis.Type: GrantFiled: November 7, 2013Date of Patent: March 10, 2015Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Mitsuo Kodama, Taketo Nonaka, Masafumi Mizuno
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Patent number: 8885293Abstract: A rotating device includes a shaft body that includes a lower rod and an upper rod formed with a retainer hole encircling a part of the lower rod and fixing the lower rod, a bearing body including a shaft encircling member that encircles the shaft body, and freely rotatable relative to the shaft body, a radial dynamic pressure generating groove which is provided in either one of the shaft body and the bearing body and which generates dynamic pressure in a radial direction, a thrust dynamic pressure generating groove which is provided in either one of the shaft body and the bearing body and which generates dynamic pressure in a thrust direction, and a lubrication medium present in a gap between the shaft body and the bearing body.Type: GrantFiled: April 19, 2013Date of Patent: November 11, 2014Assignee: Samsung Electro-Mechanics Japan Advanced Tedhnology Co., Ltd.Inventors: Mitsuo Kodama, Taketo Nonaka, Shuji Tsurusako
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Publication number: 20140314350Abstract: A rotating device includes a shaft body having a shaft, a first flange extending in the radial direction from the side face of the shaft, and a second flange extending outwardly of the radial direction from another end side, a freely rotatable bearing body including a shaft encircling member present between the second flange and the first flange in the axial direction, a radial dynamic pressure generating groove provided in either one of the shaft and the shaft encircling member, a first thrust dynamic pressure generating groove provided in either one of the first flange and the shaft encircling member, and a lubrication medium. An end of the region where the radial dynamic pressure generating groove is formed and which is distant from the second flange is located outwardly of the region where the first thrust dynamic pressure generating groove is disposed in the axial direction.Type: ApplicationFiled: June 30, 2014Publication date: October 23, 2014Inventors: Mitsuo KODAMA, Taketo NONAKA, Masafumi MIZUNO
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Patent number: 8854767Abstract: A disk drive device comprises a rotor on which a recording disk is to be mounted and a fixed body rotatably supporting the rotor through a bearing unit. The rotor includes a projecting portion configured to fit into a central hole of the recording disk, a clamper configured to be fixed to the projecting portion, and a seating portion provided radially outward of the projecting portion. The projecting portion and the seating portion are configured such that the seating portion moves with respect to the projecting portion by fixing the clamper to the projecting portion with the recording disk being in between the clamper and the seating portion.Type: GrantFiled: April 2, 2013Date of Patent: October 7, 2014Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Mitsuo Kodama, Takanori Watanabe, Susumo Ando, Taketo Nonaka
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Publication number: 20140293482Abstract: A rotating device includes a rotor on which a magnetic recording disk is to be mounted and a stator configured to rotatably support the rotor. The stator includes a support projection extending along a rotating axis of the rotor, a shaft configured to surround the support projection and fixed to the support projection, a top cover covering the rotor, and a shaft fixing screw configured to fix the top cover to the shaft. The shaft fixing screw enters a shaft fixing screw hole formed in the support projection along the rotating axis.Type: ApplicationFiled: March 25, 2014Publication date: October 2, 2014Applicant: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Mitsuo KODAMA, Taketo Nonaka, Hiroshi Kato
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Patent number: 8807836Abstract: A rotating device includes a shaft body having a shaft, a first flange extending in the radial direction from the side face of the shaft, and a second flange extending outwardly of the radial direction from another end side, a freely rotatable bearing body including a shaft encircling member present between the second flange and the first flange in the axial direction, a radial dynamic pressure generating groove provided in either one of the shaft and the shaft encircling member, a first thrust dynamic pressure generating groove provided in either one of the first flange and the shaft encircling member, and a lubrication medium. An end of the region where the radial dynamic pressure generating groove is formed and which is distant from the second flange is located outwardly of the region where the first thrust dynamic pressure generating groove is disposed in the axial direction.Type: GrantFiled: June 5, 2012Date of Patent: August 19, 2014Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Mitsuo Kodama, Taketo Nonaka, Masafumi Mizuno
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Patent number: 8780494Abstract: A rotating device includes a sleeve which encircles a shaft, a housing which supports the shaft and which forms an annular supporting recess where the lower end of the sleeve enters together with the shaft, a ring member which is provided above the sleeve and which is fixed to the shaft in a manner encircling the shaft. A first gap between the sleeve and the shaft includes first and second radial dynamic pressure generating portions. An annular sleeve recess is formed in upper face of the sleeve. The ring member includes a ring entering portion that enters the sleeve recess in a non-contact manner. An outward gap in the radial direction where the ring entering portion and the sleeve recess face with each other in the radial direction includes a second air-liquid interface of a lubricant.Type: GrantFiled: March 10, 2014Date of Patent: July 15, 2014Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Mitsuo Kodama, Masafumi Mizuno, Taketo Nonaka
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Publication number: 20140192438Abstract: A rotating device includes a sleeve which encircles a shaft, a housing which supports the shaft and which forms an annular supporting recess where the lower end of the sleeve enters together with the shaft, a ring member which is provided above the sleeve and which is fixed to the shaft in a manner encircling the shaft. A first gap between the sleeve and the shaft includes first and second radial dynamic pressure generating portions. An annular sleeve recess is formed in upper face of the sleeve. The ring member includes a ring entering portion that enters the sleeve recess in a non-contact manner. An outward gap in the radial direction where the ring entering portion and the sleeve recess face with each other in the radial direction includes a second air-liquid interface of a lubricant.Type: ApplicationFiled: March 10, 2014Publication date: July 10, 2014Applicant: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECHNOLOGY CO., LTD.Inventors: Mitsuo KODAMA, Masafumi MIZUNO, Taketo NONAKA
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Publication number: 20140139949Abstract: A rotating device comprises: a hub on which a magnetic recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a shaft configured such that it extends along the rotational axis of the hub; and a chassis arranged such that it faces the magnetic recording disk, and configured to have a Young's modulus that is smaller than that of the base. A base hole is provided to the upper face of the chassis that faces the magnetic recording disk such that it extends along the rotational axis. Furthermore, the base is fitted into the base hole, thereby fixedly mounting the base on the chassis.Type: ApplicationFiled: November 7, 2013Publication date: May 22, 2014Applicant: Samsung Electro-Mechanics Japan Advanced Technology Co., LtdInventors: Mitsuo Kodama, Taketo Nonaka, Masafumi Mizuno
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Patent number: 8711516Abstract: A rotating device includes a sleeve which encircles a shaft, a housing which supports the shaft and which forms an annular supporting recess where the lower end of the sleeve enters together with the shaft, a ring member which is provided above the sleeve and which is fixed to the shaft in a manner encircling the shaft. A first gap between the sleeve and the shaft includes first and second radial dynamic pressure generating portions. An annular sleeve recess is formed in upper face of the sleeve. The ring member includes a ring entering portion that enters the sleeve recess in a non-contact manner. An outward gap in the radial direction where the ring entering portion and the sleeve recess face with each other in the radial direction includes a second air-liquid interface of a lubricant.Type: GrantFiled: July 30, 2013Date of Patent: April 29, 2014Assignee: Samsung Electro-Mechanics Japan Advanced Technology, Co., Ltd.Inventors: Mitsuo Kodama, Masafumi Mizuno, Taketo Nonaka
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Publication number: 20140036391Abstract: A rotating device includes a sleeve which encircles a shaft, a housing which supports the shaft and which forms an annular supporting recess where the lower end of the sleeve enters together with the shaft, a ring member which is provided above the sleeve and which is fixed to the shaft in a manner encircling the shaft. A first gap between the sleeve and the shaft includes first and second radial dynamic pressure generating portions. An annular sleeve recess is formed in upper face of the sleeve. The ring member includes a ring entering portion that enters the sleeve recess in a non-contact manner. An outward gap in the radial direction where the ring entering portion and the sleeve recess face with each other in the radial direction includes a second air-liquid interface of a lubricant.Type: ApplicationFiled: July 30, 2013Publication date: February 6, 2014Applicant: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECHNOLOGY CO., LTD.Inventors: Mitsuo KODAMA, Masafumi MIZUNO, Taketo NONAKA
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Publication number: 20130342932Abstract: A disk drive device comprises a rotor on which a recording disk is to be mounted and a fixed body rotatably supporting the rotor through a bearing unit. The rotor includes a projecting portion configured to fit into a central hole of the recording disk, a clamper configured to be fixed to the projecting portion, and a seating portion provided radially outward of the projecting portion. The projecting portion and the seating portion are configured such that the seating portion moves with respect to the projecting portion by fixing the clamper to the projecting portion with the recording disk being in between the clamper and the seating portion.Type: ApplicationFiled: April 2, 2013Publication date: December 26, 2013Inventors: Mitsuo KODAMA, Takanori WATANABE, Susumo ANDO, Taketo NONAKA
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Patent number: 8608384Abstract: The rotating device includes a fixing body having a shaft and a shaft holder fixing the shaft, a rotating body having a shaft encircling member with a cylinder part encircling a shaft and a disk part, and a middle encircling member encircling the cylinder part and facing the disk part via a clearance in the direction of a rotational axis, a radial dynamic pressure generating groove disposed in either one of a surface of the cylinder part and a surface of the shaft facing with each other in the radial direction, a thrust dynamic pressure generating groove disposed in either one of a surface of the disk part and a surface of the shaft holder facing with each other in the rotational axis direction, and a lubricant continuously present from a first air-liquid interface to a second air-liquid interface between the rotating body and the fixing body.Type: GrantFiled: February 21, 2012Date of Patent: December 17, 2013Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Mitsuo Kodama, Taketo Nonaka
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Publication number: 20130322793Abstract: A rotating device includes a shaft body having a shaft, a first flange extending in the radial direction from the side face of the shaft, and a second flange extending outwardly of the radial direction from another end side, a freely rotatable bearing body including a shaft encircling member present between the second flange and the first flange in the axial direction, a radial dynamic pressure generating groove provided in either one of the shaft and the shaft encircling member, a first thrust dynamic pressure generating groove provided in either one of the first flange and the shaft encircling member, and a lubrication medium. An end of the region where the radial dynamic pressure generating groove is formed and which is distant from the second flange is located outwardly of the region where the first thrust dynamic pressure generating groove is disposed in the axial direction.Type: ApplicationFiled: June 5, 2012Publication date: December 5, 2013Applicant: ALPHANA TECHNOLOGY CO., LTD.Inventors: Mitsuo KODAMA, Taketo Nonaka, Masafumi Mizuno
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Publication number: 20130266463Abstract: A fan motor includes a static body, a rotating body that has a shaft, a hub encircling a first end of the shaft and joined with the first end, and a blade joined around an outer periphery of the hub, a sleeve that retains thereinside a portion of the shaft at a second end side, a rotating flange which encircles the sleeve and which rotates together with the hub, a static flange which is disposed in an area at a side of the first end of the shaft, and which is joined with the static body so as to overlap the rotating flange in a radial direction, a dynamic pressure generating groove provided in either one of surfaces of the static body and the rotating body facing with each other in the axial direction, and a lubricant present between the static body and the rotating body.Type: ApplicationFiled: April 4, 2012Publication date: October 10, 2013Applicant: ALPHANA TECHNOLOGY CO., LTD.Inventors: Mitsuo KODAMA, Taketo Nonaka, Akira Nishio
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Publication number: 20130234552Abstract: A rotating device includes a base having a peripheral wall with a fastened top cover, an axial body with one end fixed to the base and another end joined with the top cover, a freely rotatable bearing body with the axial body thereinside, a radial dynamic pressure generating groove in either one of surfaces of the axial body, the axial and bearing bodies facing each other in a radial direction, a lubricating medium in a space between the axial and bearing bodies, a radially outward extending lower flange on the one-end side face of the axial body, and a radially outward extending upper flange on the another-end side face of the axial body, a bearing unit in a space between the upper and lower flanges in an axial direction, a lower rod fastened to the lower flange, and an upper rod encircling the lower rod fastened to the upper flange.Type: ApplicationFiled: February 26, 2013Publication date: September 12, 2013Applicant: ALPHANA TECHNOLOGY CO., LTD.Inventors: Mitsuo KODAMA, Taketo NONAKA, Ryusuke SUGIKI
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Publication number: 20130216166Abstract: The rotating device includes a fixing body having a shaft and a shaft holder fixing the shaft, a rotating body having a shaft encircling member with a cylinder part encircling a shaft and a disk part, and a middle encircling member encircling the cylinder part and facing the disk part via a clearance in the direction of a rotational axis, a radial dynamic pressure generating groove disposed in either one of a surface of the cylinder part and a surface of the shaft facing with each other in the radial direction, a thrust dynamic pressure generating groove disposed in either one of a surface of the disk part and a surface of the shaft holder facing with each other in the rotational axis direction, and a lubricant continuously present from a first air-liquid interface to a second air-liquid interface between the rotating body and the fixing body.Type: ApplicationFiled: February 21, 2012Publication date: August 22, 2013Applicant: ALPHANA TECHNOLOGY CO., LTD.Inventors: Mitsuo KODAMA, Taketo Nonaka
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Patent number: 8398308Abstract: A bearing unit for a disk drive device is formed by a sleeve concave portion and a shaft concave portion, and is provided with a capillary seal portion in which the gap between the sleeve concave portion and the shaft concave portion is increased in diameter toward the hub side of the sleeve. Assuming that: the outer circumferential diameter at the tilt starting end on the base member side of the shaft concave portion is D0; the inner circumferential diameter at the tilt starting end on the hub side of the sleeve concave portion is D1; the facing outer circumferential diameter of the shaft concave portion, which faces, in the radial direction, the inner circumference at the tilt starting end of the sleeve concave portion, is D2; and the diameter of the most concave inner circumference of the sleeve concave portion is D3, D2 is smaller than D0, D3 is larger than D1, and the difference between D3 and D0 is larger than that between D0 and D2.Type: GrantFiled: June 14, 2010Date of Patent: March 19, 2013Assignee: Alphana Technology Co., Ltd.Inventors: Taketo Nonaka, Toshiki Maeda
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Patent number: 7901138Abstract: A fluid bearing device (50B, 50AB) is composed of a shaft (1, 51); a sleeve (9, 59) into which the shaft (1, 51) is inserted; and lubrication fluid (20) intervening in a gap between the shaft (1, 51) and the sleeve (9, 59), the fluid bearing device (50B, 50AB) supporting the shaft (1, 51) so as to be relatively rotatable freely with respect to the sleeve (9, 59), wherein an end portion of the sleeve (9, 59) is provided with a taper ring (4, 54) in annular shape, wherein at least either one of an inner circumferential surface (4a, 54a) of the taper ring (4, 54) and an outer circumferential surface (1a, 91b) of the shaft (1, 51) facing towards the inner circumferential surface (4a, 54a) of the taper ring (4, 54) is formed into a tapered surface (4a, 54a), which inclines in a direction as a gap between the inner circumferential surface (4a, 54a) of the taper ring (4, 54) and the outer circumferential surface (1a, 91b) of the shaft (1, 51) widens in accordance with leaving from the sleeve (9, 59) and forms a tapeType: GrantFiled: September 22, 2006Date of Patent: March 8, 2011Assignee: Alphana Technology Co., Ltd.Inventors: Mitsuo Kodama, Taketo Nonaka
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Publication number: 20110007989Abstract: A bearing unit for a disk drive device is formed by a sleeve concave portion and a shaft concave portion, and is provided with a capillary seal portion in which the gap between the sleeve concave portion and the shaft concave portion is increased in diameter toward the hub side of the sleeve. Assuming that: the outer circumferential diameter at the tilt starting end on the base member side of the shaft concave portion is D0; the inner circumferential diameter at the tilt starting end on the hub side of the sleeve concave portion is D1; the facing outer circumferential diameter of the shaft concave portion, which faces, in the radial direction, the inner circumference at the tilt starting end of the sleeve concave portion, is D2; and the diameter of the most concave inner circumference of the sleeve concave portion is D3, D2 is larger than D0, D3 is larger than D1, and the difference between D3 and D0 is larger than that between D0 and D2.Type: ApplicationFiled: June 14, 2010Publication date: January 13, 2011Applicant: ALPHANA TECHNOLOGY CO., LTD.Inventors: Taketo NONAKA, Toshiki MAEDA