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| Number | Title | Issue Date |
| 7391139 | Spindle motor and rotation apparatus A spindle motor which allows appropriate formation of communicating hole for compensating a pressure difference due to an error in working of dynamic pressure generating grooves and other components, easy formation of dynamic pressure generating grooves and readily ... | 06/24/2008 |
| 6954017 | Motor A motor of this invention is provided with a sleeve-type bearing impregnated with oil for supporting a rotor assembly including a shaft and a rotor member. A lower face of the rotor is provided with at least two peripheral wall portions, an inner peripheral wall por... | 10/11/2005 |
| 6747831 | Floppy disk drive and frame structure therefor In a floppy disk drive having a main frame in which a floppy disk is inserted and a DD motor for rotatably driving the floppy disk inserted in the main frame, the floppy disk drive has a motor frame for mounting the DD motor thereon that is constituted by one piece ... | 06/08/2004 |
| 5926342 | Air dynamic pressure bearing apparatus and data drive apparatus using the same In a dynamic pressure bearing apparatus having a fixed shaft, dynamic pressure generating grooves formed at least on one side of circularly facing surfaces of a rotor and of the fixed shaft which is rotatably meshed with the rotor, a radial bearing formed... | 07/20/1999 |
| 5859486 | Rotary motor and production method thereof, and laminated core and production method thereof An object of the present invention is to provide a low cost, high performance, thin structure rotary motor for driving medium used in magnetic disk drive unit, optical disk drive unit or the like, in order to improve the productivity of terminating proces... | 01/12/1999 |
| 5834084 | Disc drive flex assembly having a low particulating circuit board A low particulating circuit board for a disc drive flex assembly, and a method for forming the same, are disclosed. The circuit board comprises a conductive metal substrate which has sufficient thickness to provide mechanical support and backplane suppres... | 11/10/1998 |
| 4965476 | Stabilized disk drive spin motor An under-the-hub spin motor for a disk drive includes a stabilizer for supporting the outer diameter of the stator to stiffen the base of the spin motor. Stiffening the base in the region surrounding the shaft of the motor increases the resonant frequency... | 10/23/1990 |
| 4873596 | Magnetic disk drive apparatus A magnetic disk drive apparatus includes a base plate and a first motor mounted on the base plate. The first motor has a rotatable shaft engageable with a magnetic disk for rotating the magnetic disk. A carrier has a central opening through which the shaf... | 10/10/1989 |
| 4843500 | Disk storage drive A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The r... | 06/27/1989 |
| 4686592 | Disk drive assembly An improved disk drive device including a disk of recording media and having a central aperture, which disk is supported at its periphery by a cylindrical housing. A spindle motor is positioned at the outer periphery of the housing along with a single set... | 08/11/1987 |
| 4641212 | Apparatus for loading a magnetic disc and for controlling the driving thereof A hub holder which pushes the center hub of a magnetic disc to a reference surface for setting is associated with a cassette guide for guiding a magnetic disc cassette to a recording/reproducing position at which information is recorded or reproduced to o... | 02/03/1987 |
| 4466031 | Magnetic disc apparatus A floppy disc has a disc holder provided at the center of a disc-shaped recording medium. The disc holder is formed of a magnetic material and has a central bore at its center. A rotating member has a cylindrical rotating shaft portion and a flanged porti... | 08/14/1984 |
| 4376997 | Spindle assembly A spindle assembly of a type adapted to receive a readily removable disc for rotation senses the thickness of the disc with respect to a predetermined thickness and in response to so sensing the thickness of the disc an indication is provided as to whethe... | 03/15/1983 |
| 4352132 | Floppy disc drive A floppy disc drive which is constructed so that when a record disc is inserted into the unit, the disc actuates a microswitch to energize an electric motor. The energized electric motor causes a central hub abruptly to start, and this action causes a coa... | 09/28/1982 |
| 4117737 | Drive belt loading system A drive belt loading system for automatically loading and unloading a drive belt onto a pulley of a removable device employs a conical transfer means for automatically transferring the drive belt to the pulley upon tensioning of the belt. The transfer mea... | 10/03/1978 |
| 4064545 | Magnetic coupling of disk file module An improved disc memory module design in which mechanical force to shift the data transducers and to rotate the discs is supplied through magnetic couplings to the module, thereby avoiding radial stresses created by mechanical couplings such as belts, spl... | 12/20/1977 |
