Class 360/266.4 - Voice coil

Subclass of Class 360 - Dynamic magnetic information storage or retrieval
Definition: Subject matter wherein a voice coil provides motive power
No. of patents: 28
Last issue date: 09/02/2008

Number	Title	Issue Date
7420782	Rotating disk storage device Embodiments of the present invention provide a rotating disk storage device adopting a thin yoke structure. In one embodiment, the yoke structure of a voice coil motor includes a base of a casing formed from a ferromagnetic material; an auxiliary yoke disposed so as...	09/02/2008
7275303	Method for making a disc drive The upper voice coil motor magnet assembly (64a′) of a disk drive (10′) is magnetically aligned with the lower voice coil motor magnet assembly (64b′) using an alignment fixture (126). The alignment fixture (126...	10/02/2007
7218480	Magnetic detent for transducer positioning mechanism In a tape data storage arrangement, a magnetic detent is provided to maintain a tape read/write head in selected positions with respect to the tape, during data transfer. The tape is mounted on a carriage movable between first and second positions, with respect to a...	05/15/2007
6963472	Flexural pivot for rotary disc drive actuator The present invention provides for a flexural pivot that can be fitted within a cavity of an actuator. The pivot includes a first member that can be coupled to the wall defining the cavity and a second member that can be mounted to the disc drive housing component o...	11/08/2005
6541931	Dual stage positioning system using a shared voltage source A system for positioning a read/write head having a voice coil suitable for coarse control and a piezoelectric transducer (PZT) suitable for fine control. A voice coil control signal and a PZT control signal are generated from a position-indicative signal...	04/01/2003
6373208	System for voltage regulation of a voice coil motor A method is disclosed for controlling the voltage applied to a voice coil motor coil during the retract operations of a mass storage device, comprising a combination of three different voltage regulator stages. This method includes providing a first circu...	04/16/2002
6246549	Method and apparatus for reducing the coupling of the reaction force from the head actuator into the track follow servo loop of a media drive The reaction force decoupling system, as implemented in a tape drive, reduces the motion that is coupled back into the tape cartridge from the reaction force that is generated by the operation of the read/write head actuator. The read/write head actuator ...	06/12/2001
6194892	Integrated position sensor for a disk drive microacuator An improved micro-actuator position sensor which provides an accurate position signal for higher bandwidth control of a micro-actuator. The position sensor allows closed loop control of the micro-actuator position. Preferred embodiment micro-actuator sens...	02/27/2001
5926346	Disk drive barriers that restrain movement of the drive actuator An actuator for carrying a read/write head into engagement with a surface of a recording medium includes a carriage assembly including a load beam upon which the read/write head is mounted, and a pair of barriers disposed on opposite sides of the load bea...	07/20/1999
5416658	Information storage device using a rotary recording medium Degradation of a detector-head positioning in an information storage device using a rotary recording medium may be prevented. A reaction force which gives a vibration to a positioning mechanism in a magnetic disk drive generally occurs when the detector h...	05/16/1995
5363262	Disk drive having an improved transducer suspension assembly A hard disk drive having an actuator assembly in which only flexible integral load beams are used in the armstack structure. The load beams are assembled in a stack on a tubular actuator member along with the movable coil member of the actuator motor, or ...	11/08/1994
5313446	Disc drive device having a head carriage A disc drive device has a head mounted on a head carriage with a head moving support mechanism which is capable of moving the head to the extent of one track pitch. The device is arranged to advance the head for a plurality of recording tracks on a disc-s...	05/17/1994
5130972	Optical recording and reproducing apparatus An optical recording and reproducing apparatus includes a movable portion carrying a movable optical system, a sliding member slidable on a guide shaft, and a rotation limiting device engaged with an auxiliary guide shaft so as to limit the rotation of th...	07/14/1992
5130874	Disk file actuator with heat dissipation and simplified component mounting An actuator assembly for a magnetic recording disk file and method of fabricating same. A sleeve surrounds and is axially moveable relative to a stator to control the axial position of a head/arm assembly relative to a magnetic recording disk. The sleeve ...	07/14/1992
5084640	Eddy current brake with N impedence gaps A disk drive actuator includes automatic eddy-current braking capability, enhanced by simple modifications of coil-mount structure, such as a split damping ring DR and spaced-rib array DR-R....	01/28/1992
4969058	CArriage assembly for high track density flexible magnetic disk drive A carriage assembly for use with high track density flexible magnetic disk drive systems that comprises a base carriage, which supports a permanent magnet, driven by a stepper motor used to achieve course positioning of the carriage assembly. A fine posit...	11/06/1990
4967293	Multi-positioner magnetic disk storage apparatus having means for reducing mechanical vibration interference between positioners A magnetic disk storage apparatus in which a plurality of magnetic head positioners are independently driven with respect to each other. A housing having a sensor secured thereto indirectly senses mechanical vibration of a magnetic disk and issues a sense...	10/30/1990
4937693	Staggered heads for minimizing disk spacing in a disk drive A disk drive is provided in which the arm/head structures of the armstack are mounted in circumferentially spaced pairs, on individual projections of a rotatable actuator. The mounted pairs of arm/head structures project between the confronting disk surfa...	06/26/1990
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
4864444	Latch for high performance linear actuator for memory storage device A high performance linear actuator for a memory storage device includes a carriage having bearings at opposed sides thereof for engaging a pair of rail members. One of the pair of rail members is preloaded against the respective carriage bearings to provi...	09/05/1989
4827162	Controlled drag for magnet actuator A disk drive actuator including automatic eddy-current braking capability, enhanced by simple modifications of coil-mount structure, such as split damping ring DR and spaced-rib array, this array shown for example in FIG. 12 (see DR-R)....	05/02/1989
4620253	Low mass actuator system for magnetic recording disk An actuator for a magnetic read/write head carried by a linear motor has its stator located between a pair of disks within a stack of magnetic recording disks. The stator comprises an array of reversed polarity magnets (preferably permanent) in a linear a...	10/28/1986
4530021	Micromotion release of heads from lubricated magnetic disks In a magnetic recording disk file in which one or more magnetic sliders rest on the surfaces of the disks when the disks are not rotating, a short oscillatory micromotion is imparted to the slider or sliders prior to starting rotation of the disks, this m...	07/16/1985
4285018	Disk file A disk file for storing data is disclosed which comprises two major separable assemblies, an HDA assembly and a disk drive assembly. The HDA assembly is characterized by two separate carriage units each of which function to position a plurality of magneti...	08/18/1981
4208685	Disk storage apparatus having an electrically tuned head-carriage actuator In a signal storage apparatus employing a rotating record disk, the resonant frequency of a head carriage assembly is tuned to the rotational speed of the record disk. The head carriage assembly, in following a record track on the record disk, has to acco...	06/17/1980
4131924	Flexure mounted magnetic head positioner for high-speed translation Data is recorded on a magnetic recording disk with data transducers adjustably positioned relative to respective "data zones," each zone comprising a prescribed number of adjacent data tracks. A family of such transducers may be mounted together as a unit...	12/26/1978
4075517	Linear actuator An electromagnetic actuator is disclosed having a magnetic circuit which provides a plurality of annular, concentrically located air gaps and a plurality of annular actuator forms which are positioned in the air gaps. A winding is mounted on each of the f...	02/21/1978
4034411	Magnetic disk information storage apparatus A magnetic disk information storage apparatus comprises a head/disk assembly removably mounted in a housing assembly. The head/disk assembly encloses rotatably mounted disks, and accessing heads mounted for linear movement on a carriage. Fixed to the carr...	07/05/1977

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Class 360/266.4 - Voice coil