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4922406 |
Labyrinth seal in disk storage drive
A disk storage has one or more disks provided with center holes. An electric motor extends coaxially through these holes and has an external rotor to the outer circumference of which the disks are...
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4905110 |
Disk drive spindle motor
An improved spindle motor is provided for rotatably driving one or more memory storage disks in a computer disk drive or the like. The spindle motor comprises a stator shaft having opposite ends...
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4903155 |
Disc drive
A disc drive for a disc including a disc rotating apparatus comprising a rotating shaft for being received within a first aperture of the disc. A spindle is affixed to the shaft. The spindle has a...
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4901173 |
Apparatus for coupling record disk to disk drive
A device for coupling and aligning a rotatable disk with the motor used for rotating that disk is disclosed. The end of the motor drive shaft includes a drive spindle having a V shaped slot in its...
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4896239 |
Bi-compliant rotor stepper motor for an actuator in a disc drive
This invention provides a technique for effectively floating the rotor of a disc drive motor, thereby permitting small motions in the axial (non-critical) direction while maintaining significant...
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4896232 |
Chucking mechanism for floppy disk drive
A disk rotatably driving device which has a disk of a magnetic material and a turntable formed with an element base on the upper surface of the disk, fixed to a rotatably driving shaft, a pole...
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4887175 |
Disc driving unit
A disc driving unit is arranged so that a spindle for rotating a disc member, a pulley coupled to the spindle to transmit a rotational force to the spindle, and an inner or outer ring of a bearing...
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4882671 |
Microprocessor controlled rigid disk file subsystem
A control system for a micro-Winchester or smaller disk file includes head position control circuitry including at least one servo loop for controlling an electromechanical head positioner relative...
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4882643 |
Disc drive motor
A disc drive motor having a rotor magnet at the internal circumference surface of a hub supporting a disk at its external circumferential surface. The rotor magnet is opposed to an internal motor...
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4881140 |
Integrated disc drive and actuators support
In a disc drive, the normal bearing pivot assembly is replaced with a combination of a lightweight actuator arm and biasing strip spring. One end of the strip spring is mounted to a block and the...
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4870703 |
Magnetic disc memory unit
A magnetic disc memory unit is presented wherein a pair of read/write heads are on a pivot arm which is belt driven by a stepper motor. The read/write heads move in an arc, and they retract to a...
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4858044 |
Disc drive spindle motor with low cogging torque
A disc drive spindle motor having a stator with nine evenly distributed windings separated by relatively large slot openings, further comprises a rotor having a radially polarized eight-pole...
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4858045 |
Magnetic disk lock having braking apparatus
A magnetic disc drive brake assembly which automatically locks the disc drive when it is removed from its case. As the disc drive is lifted, a spring is released, which spring forces a brake pad...
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4847712 |
Disc drive spindle motor with log cogging torque
A spindle motor is adapted to support a hub with one or more discs thereon. The motor comprises a stator with nine windings of equal cross-section and a rotor with eight equally spaced poles...
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4823213 |
Recording and reproducing disc driving apparatus
A recording and reproducing disc driving apparatus has a main base which has seat portions for supporting a head, a carriage, first and second motors and a sensor and has at least one cut portion,...
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4818907 |
Brushless motor for driving magnetic disks
A brushless motor for driving magnetic disks comprises: a housing having at least one through hole therein; a stator attached to the housing; a rotor having a driving magnet in opposing...
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4819104 |
Disk pack drive with electric motor having sintered permanent magnets
A low-cost, compact disk pack drive with an external rotor motor permanent magnet-excited by sintered ferrite magnets in the form of partial shells is to be provided. The external rotor motor is...
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4805054 |
Recording and/or reproducing device for the flexible magnetic disk
A recording and/or reproducing device for a disk enclosed in a cassette is disclosed. The device is comprised of a chassis, bearing members included in the chassis, a spindle mounted by these...
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4803576 |
Disc driving device
A disk driving device which can be reduced in production cost and in overall thickness and can prevent a circuit board from being damaged upon ejection of a disk cartridge therefrom. The disk...
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4802040 |
Disk-type recording and reproducing apparatus
A disc-type recording and reproducing system in which only a single motor is required for rotating the disc and for moving a magnetic head radially with respect to the disc. The system includes a...
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4800456 |
Magnetic disk device with component materials having improved silicon content
A magnetic disk device comprising a box-shaped base; a spindle motor attached to the upper plate of the base to rotate a magnetic disk through the action of a hub; a swing arm rotatably supported...
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4800453 |
Recording and/or reproducing apparatus adapted for utilization of record bearing media of a disc type
A recording and/or reproducing apparatus using a disc shaped record bearing medium which includes a recording and/or reproducing head; a drive mechanism for rotating the medium relative to the...
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4797769 |
Disc driving device
A disc driving device having a housing in which are formed by cutting a pair of front bearing portions in the vicinity of a disc drive motor mounting hole and a pair of rear bearing portions at...
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4797873 |
Disk cramp apparatus
This invention is constructed so that when a flexible disk is cramped to a hub of a spindle, a possible miscramping of the disk is prevented. To this end, a rotating means is provided to apply...
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4782406 |
Data transfer apparatus with a disklike record medium and a method of operation therefore
A data transfer apparatus for use with a replaceable disklike record medium such as a flexible magnetic disk having data storage tracks thereon, comprising a disk drive motor for imparting rotation...
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4779165 |
Disk storage drive
A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical...
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4764831 |
Apparatus and method for retaining a head arm of a disk drive assembly
A disk drive which includes an automatic parking brake for retaining the driver arm in a predetermined position when power is removed from the disk drive. The brake is mounted externally to the...
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4760476 |
Drive mechanism for a magnetic disk reading head
A magnetic disk apparatus with a driving roller to engage a hole on a metal core of a disk cartridge to thereby drive the cartridge. The shaft of the apparatus has three different diametered...
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RE32702 |
Brushless D.C. motor assembly
An improved motor assembly including a brushless D.C. motor and an annular member defining a platform for the drive electronics and speed control circuits of the motor. The member is carried on a...
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4752847 |
Storage disk drive mechanism
A storage disk drive mechanism is disclosed for rotatably driving a storage disk comprising a flexible circular information recording medium attached to a hub member. The hub member is of the type...
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4740851 |
Disk drive with spicule member
A device for aligning a disk contained in a cartridge with a motor and transducer of a disk drive is disclosed. A record disk contained within a rigid apertured cartridge is inserted into a disk...
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4737870 |
Magnetic recording and reproducing apparatus having disk centering bearing
A magnetic recording and reproducing apparatus including a turntable supported rotatably by ball bearings on a fixed shaft. The turntable is adapted to support a magnetic disk having a central hole...
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4731680 |
Disk drive with stored positioning data related to disk expansion
A disk drive apparatus includes apparatus for elimination of off-track errors of a read/write head by deriving and storing correction data for all of the tracks on a disk on the basis of the signal...
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4725907 |
Carriage latch for a disc drive incorporating inertial lock-up
A dynamic latching mechanism for a disc drive includes a latch rotatable about a pivot which captures an extension on the carriage. The latch is mounted in a frame directly attached to the disc...
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4722012 |
Disc drive arrangement for a hard disc cartridge having a carriage for accurately positioning a head relative to the cartridge
A disc drive arrangement 10 for accessing information from and recording information onto a disc 25 to be retained in a cartridge 27 which comprises a carriage 24 for mounting and transporting the...
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4713703 |
Information recording and reproducing apparatus
An information recording and reproducing apparatus of the hard disk type comprises a motor for rotatably driving hard disks secured to a driving hub attached to the driving shaft thereof, a pivot...
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4713704 |
Disk storage spindle arrangement
A spindle assembly for use with a magnetic disk or the like including a pair of bearings axially spaced by an outer ring and a shaft is posed through the outer ring. A receiving part is placed over...
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4707751 |
Supporting device of a shaft drive of a magnetic record and reproduction device
In a supporting device for supporting a shaft drive for rotating a magnetic disc inserted in a magnetic recording and reproduction device, a motor-driven shaft, provided with a hub applicable to a...
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4701653 |
Disk drive with internal brake and static discharge
A drive unit for direct drive of an information-storage disk comprises a collectorless D.C. external-rotor motor having a permanent-magnet rotor magnet arrangement of considerably reduced axial...
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4692827 |
Divided housing for a magnetic disk drive comprising a peripheral sealing ring
A housing for a magnetic disk memory comprises a support shell and a cover for housing a magnetic disk pack and a rotational positioner. The disk pack is provided with two bearing locations one of...
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4692826 |
Bearing assembly with integrated ferrofluid seal
A bearing assembly with an integrated single-stage ferrofluid seal incorporated therein, which assembly comprises: a bearing assembly having an inner and outer race to define a raceway and a...
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4669007 |
Magnetic recording/reproducing apparatus
A magnetic recording/reproducing apparatus of small size, small weight, and suitable for incorporation into a child's toy or the like. A magnetic disc is supported on a shaft, the latter being...
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4661735 |
Arrangement for mounting a plurality of motors
A plurality of motors are arranged on opposite surfaces of a single magnetic base plate such that they are magnetically isolated from each other by the base plate. Such an arrangement prevents the...
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4658311 |
Magnetic data transfer apparatus having a disk drive mechanism protected against leakage flux
A data transfer apparatus for use with a magnetic disk having a hub of magnetic material attached centrally thereto, with the hub having a central hole and an eccentric slot defined therein. A...
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4654725 |
Index signal issue mechanism of a magnetic record and reproduction device
An index signal issue mechanism of a magnetic record and reproducing device has a magnetic disc, a spindle hub which chuck and rotates the magnetic disc and has a lower surface, a driving pin...
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4651241 |
Pulse generator in storage drives
Device for a drive for storage media for the generation of at least one index pulse per revolution of a rotating element with a generator, which, during operation, for each revolution of the...
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4641209 |
Disc type information storage and retrieval system
A disc type of information storage and retrieval system is disclosed herein. This system utilizes a cartridge type of information storage disc arrangement including a rotating disc and its own...
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4635151 |
Rotary actuator having preloaded spring crash stop
A crash stop assembly for use in a rotary actuator includes a folded leaf spring having two opposing spring arms joined by a base portion. The base portion is mounted to the rotary actuator with...
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4633349 |
Disk drive air filter assembly
A cartridge filter for an enclosed magnetic disk drive is disclosed which includes a dual media drum type filter element in a recirculating filter assembly that surrounds the breather filter and...
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4631608 |
Disk drive disk control apparatus
A disk drive having a slot for receiving a disk and a knob for causing a leading head to engage the disk in which the knob includes means for holding the disk securely inserted in the disk drive.
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