| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360260000 | For shifting head between tracks | 60 |
| 20150348586 | LINEAR ACTUATOR WITH COIL WINDING PORTIONS HAVING OPPOSING CURRENT FLOW DIRECTIONS - A linear actuator for linearly positioning a recording head in a data storage mechanism. The disclosed linear actuator includes an electrically conductive coil having first and second parts that are both wound in the same rotary direction about an axis, and a magnet spaced from the electrically conductive coil by an air gap. Transmission of an electric current through the first part of the electrically conductive coil in a first current flow direction about the axis and through the second part of the electrically conductive coil in an opposite second current flow direction about the axis induces linear movement of one of the electrically conductive coil and magnet relative to the other of the electrically conductive coil and magnet. | 12-03-2015 |
| 360261100 | Tape record having linear head movement | 3 |
| 20080253029 | Magnetically Preloaded Linear Guide for a Transducer - A transducer for a digital storage apparatus that reads and writes data to a tape as the tape is moved in a tape drive path across the transducer. The transducer comprises a base and a head assembly that is attached to the base and movable relative to the base in a linear path that is perpendicular to the tape drive path. A guide assembly guides the movement of the head assembly that has a track that is partially defined by the head and partially defined by the base. The guide assembly includes at least two balls that are disposed in the track between the base and the head assembly. A magnetic coupling retains the balls within the track. A linear motor operatively engages the head assembly to move the head assembly to follow the tape. A method is provided for retaining a movable head of a transducer on a base of the transducer with a magnetic coupling. | 10-16-2008 |
| 20090141405 | TRANSDUCER POSITIONING ASSEMBLY - An actuator assembly is provided for positioning a transducer with a primary frame and a secondary frame mounted thereto for transverse translation. A coarse actuator is connected to the frames for translating the secondary frame incrementally. A carriage with a transducer is mounted to the secondary frame for transverse translation. A fine actuator is connected to the secondary frame and the carriage. The coarse actuator provides coarse adjustment and the fine actuator provides fine adjustment of the transducer for following tape. A method for positioning a transducer is provides a transducer connected to a coarse actuator and a fine actuator. Tape is conveyed across the transducer and lateral motion of the tape is monitored. The transducer is positioned by the fine actuator relative to a lateral tape position, and if the position exceeds a predetermined range, then the transducer is positioned by the actuation of the coarse actuator. | 06-04-2009 |
| 20100091411 | NON-RADIAL BEARING PRELOAD - A system and method for reducing resonance in a data transfer system are herein disclosed. A data transfer system comprises a bearing and a guide member. The bearing further comprises an outer ring. The guide member is arranged relative to the bearing so as to guide the outer ring for movement relative to the guide member, and to induce an axial preload in the bearing assembly. | 04-15-2010 |
| 360264000 | Disk record | 56 |
| 20090059434 | ARM BLADE, HEAD STACK ASSEMBLY COMPRISING THE SAME, AND HARD DISK DRIVE COMPRISING THE HEAD STACK ASSEMBLY - An arm plate coupled to a pivot bearing to closely contact an overmold and having a leading end portion where a head gimbal assembly (HGA) is attached when assembling a head stack assembly (HSA) of a hard disk drive (HDD), wherein a bending alleviation through hole is formed in a portion that overlaps and closely contacts an edge of the overmold, the head stack assembly with the arm plate, and the hard disk drive with the head stack assembly. | 03-05-2009 |
| 20090168252 | HEAD STACK ASSEMBLY AND DISK DRIVE APPARATUS PROVIDED WITH THE SAME - According to one embodiment, a head stack assembly includes a bearing portion configured to be mounted with a maximum number of arms and a plurality of spacers, a smaller number of arms than the maximum number attached to the bearing portion and extending in the same direction from the bearing portion, a spacer attached to the bearing portion and stacked in layers between the adjacent arms, suspensions and heads attached to the arms, individually, a support frame which supports a coil, and a dummy spacer attached to the bearing portion so as to overlap the arms. The dummy spacer integrally includes a spacer body formed with a thickness equal to the sum of those of the smaller number of arms than the maximum and the spacer arranged between the smaller number of arms, and a balancing portion extending along the extension of the arms from the spacer body. | 07-02-2009 |
| 20090244783 | MANUFACTURING METHOD OF MAGNETIC RECORDING MEDIUM, THE MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - A manufacturing method of a magnetic recording medium, the magnetic recording medium having a structure where plural magnetic recording areas and isolation areas in a magnetic recording layer are formed on a non-magnetic substrate, the isolation areas being configured to magnetically isolate the magnetic recording areas, the manufacturing method includes a step of forming the magnetic layer on the non-magnetic substrate, the magnetic layer being made of a hard magnetic material having a magnetic coercive force whereby magnetic recording is impossible; and a step of performing ion implantation partially at positions corresponding to the plural magnetic recording areas of the magnetic layer so that the magnetic recording areas are formed by reducing the magnetic coercive force in the positions of the ion implantation to a magnetic-recordable magnetic coercive force, and allowing the isolation areas to maintain the magnetic coercive force whereby magnetic recording is impossible. | 10-01-2009 |
| 20100027165 | SYMMETRICALLY TAPERED CONSTRAINED LAYER DAMPER FOR A FLEX CABLE ASSEMBLY FOR A HARD DISK DRIVE - A flex cable assembly for a head stack assembly of a hard disk drive comprises a flex cable for conducting data signals from the head stack assembly to a connector. The flex cable has a dynamic loop section between a termination for the head stack assembly and the connector. The flex cable has a constrained layer damper for attenuating random transient vibration. The constrained layer damper has a symmetrically tapered shape for reducing stress concentration and is coupled with the dynamic loop section of the flex cable adjacent to an area of the flex cable configured for receiving a coupler for coupling the flex cable assembly with the head stack assembly. | 02-04-2010 |
| 20100296199 | LOW HYSTERESIS BEARING - A low hysteresis pivot bearing suitable for a variety of applications. The relationship between torque and angular displacement is substantially linear, with negligible residual hysteresis. The pivot bearing includes a pivot shaft and an inner sleeve pivotally attached to the pivot shaft by an inner bearing. An outer sleeve is pivotally attached to the inner sleeve by an outer bearing. An inner sleeve actuator continuously rotates the inner sleeve relative to the stationary shaft. | 11-25-2010 |
| 20110069414 | HARD-DISK DRIVE - A hard-disk drive. The hard-disk drive includes a magnetic-recording disk in which tracks adjacent to each other are magnetically separated, a spindle motor which drives the magnetic-recording disk, a magnetic-recording head equipped with write element and read element, an actuator for positioning the magnetic-recording head on a predetermined track on the magnetic-recording disk, and a control unit. The control unit is configured to store information about an over-write-only track that is provided for a plurality of tracks including n consecutive tracks in at least a partial radial area of the magnetic-recording disk and an offset amount. In a radial area of the magnetic disk where the over-write-only track is located, the control unit is configured to record with an offset by an offset amount from a center of a track toward the over-write-only track with respect to n−1 tracks of the plurality of n tracks, excluding the over-write-only track. | 03-24-2011 |
| 360264100 | Arcuate head movement | 38 |
| 20110242706 | MAGNETIC RECORDING MEDIUM - According to one embodiment, a servo area of a magnetic recording medium includes magnetic dots arrayed at a period L | 10-06-2011 |
| 360264200 | Electrical connection detail onto actuator arm | 9 |
| 20080225439 | MAGNETIC HEAD ACTUATOR ASSEMBLY - According to an aspect of an embodiment, a magnetic head actuator assembly comprises a magnetic head assembly, a suspension for supporting the magnetic head assembly at one end thereof, a circuit board fixed to the suspension at one end thereof for providing a circuit connection to the magnetic head assembly, the circuit board having a plurality of terminals and an engaging portion at the other end thereof and a carriage for supporting the suspension at the other end of the suspension, the carriage having a connecting circuit board having a groove for receiving a part the circuit board where the plurality of terminals are formed, a plurality of connecting terminals, and an engaged portion, wherein the engaging portion of the circuit board is engaged to the engaged portion of the connecting circuit board so as to align the terminals with the connecting terminals, respectively. | 09-18-2008 |
| 20090009912 | PRINTED CIRCUIT CABLE ASSEMBLY FOR TOP DOWN INSTALLATION - A printed circuit cable assembly for top down installation in a disc drive or the like in which a printed circuit cable supporting electrical conductor paths has a body portion, a flex portion and an insertion tab connecting the body portion and flex portion. A PCC support member having a support ramp extending into a slotted gap supports the printed circuit cable with the insertion tab extending into the slotted gap so that the flex portion is extended for attachment to a moveable article, such as the head stack assembly of a disc drive. Preferably, the PCC support member has an indexing bore, and the PCC support member with the supported printed circuit cable is mounted to a support member having an indexing post, the PCC support member positioned so that indexing bore is positioned over the indexing post. | 01-08-2009 |
| 20090046390 | SYSTEM, METHOD, AND APPARATUS FOR AN INDEPENDENT FLEXIBLE CABLE DAMPER FOR REDUCING FLEXIBLE CABLE FATIGUE IN A HARD DISK DRIVE - A hard disk drive has a flexible cable and a flexible cable damper positioned adjacent to but separate from the flexible cable. The damper is a thin film loop with a damper patch that is completely independent of the flexible cable. The damper strip is a non-signal carrying substrate and has the constraint layer attached to it opposite the flexible cable. Both the damper and flexible cable extend in an arcuate configuration from the base to an integrated lead suspension tail extending from the actuator. | 02-19-2009 |
| 20090046391 | ELECTRICAL CONNECTION BETWEEN A SUSPENSION FLEXURE CABLE AND A HEAD STACK ASSEMBLY FLEXIBLE CIRCUIT - A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam. | 02-19-2009 |
| 20090290262 | CARRIAGE ARM ASSEMBLY, DISK DRIVE AND PRESSER MEMBER - A carriage arm assembly includes: a carriage arm that holds a head slider and a head IC communicating with the head slider and has a first engagement part between the head slider and the head IC; a signal relay member that are provided on the carriage arm and relays signals between the head slider and the head IC; and a presser member that has a second engagement part engaged with the first engagement part and is attached to the carriage arm by engaging the first and second engagement parts with each other, the signal relay member being held by a projection provided in one of the carriage arm and the presser member and a recess that is provided in the other and is engaged with the projection. | 11-26-2009 |
| 20100067150 | METHOD OF UTILIZING A SOLDER REFLOW CHANNEL IN THE FORMATION OF A HARD DISK DRIVE - A method of utilizing a solder reflow channel in the formation of a hard disk drive is disclosed. The method provides a first hard disk drive component having at least one solder reflow channel, the at least one solder reflow channel for retaining a predeposited solder material. The solder reflow channel is utilized to provide a solder location for coupling the first hard disk drive component and a second hard disk drive component to the predeposited solder material. | 03-18-2010 |
| 20100085665 | DAMPING MEMBER FOR A MOVEABLE FLEX CIRCUIT - Method and apparatus for attenuating resonances in a flex circuit which interconnects a stationary element and a moveable element, such as a connector and a head stack assembly (HSA) in a data storage device. An intermediary portion of the flex circuit forms a dynamic loop between the stationary element and the moveable element. A damper member is attached to the flex circuit so as to continuously extend adjacent the stationary element and along less than an overall extent of the dynamic loop. The damper member attenuates resonances excited in the flex circuit during movement of the moveable element. | 04-08-2010 |
| 20100123976 | ARM MOUNTED SHOCK SENSOR AND FLEXIBLE CIRCUIT ROUTING - An actuator for supporting data transfer elements includes an arm, a flexible circuit assembly and a sensor. The flexible circuit assembly includes a stiffener having a mount feature and a turnaround feature. The flexible circuit assembly also includes a flexible cable having a plurality of conductive traces for electrically connecting the data transfer elements to circuitry. The flexible cable has a service loop portion, a mounting portion coupled to the mount feature of the stiffener and a turnaround portion coupled to the turnaround feature of the stiffener. The turnaround portion is configured to couple the mounting portion to the service loop portion. The sensor is in contact with a surface of the arm and is electrically coupled to the flexible cable. | 05-20-2010 |
| 20110216445 | ELECTRONIC SUBSTRATE AND MAGNETIC DISK APPARATUS - An electronic substrate includes: a flexible printed circuit comprising a head connecting portion being provided with a first terminal to be electrically connected to a magnetic head, and a board connecting portion being provided with a second terminal to be electrically connected to a main printed board; a first reinforcing member provided on the head connecting portion of the flexible printed circuit, the first reinforcing member reinforcing the head connecting portion; and a second reinforcing member provided on the board connecting portion of the flexible printed circuit, the second reinforcing member reinforcing the board connecting portion, wherein the second reinforcing member includes a additional enhancement portion formed with a sterically enhanced shape. | 09-08-2011 |
| 360264300 | Driver detail | 16 |
| 360264700 | Voice coil | 16 |
| 20080310054 | Plurality of non-magnetic dampers on a voice coil yoke arm - A plurality of non-magnetic dampers on a voice coil yoke arm for reducing low frequency vibration in a hard disk drive is disclosed. One embodiment provides housing and at least one disk coupled with the housing. In addition, an actuator is coupled to the housing, the actuator having a coil region with a voice coil and a plurality of voice coil yoke arms. At least one of a plurality of non-magnetic dampers is also coupled with each of the plurality of voice coil yoke arms and not with the voice coil. In so doing, the plurality of non-magnetic dampers are able to damp low frequency actuator coil torsion and coil bending resonances. | 12-18-2008 |
| 20090015968 | Voice coil motor and disk drive unit with the same - A voice coil motor for a disk drive includes a permanent magnet, a voice coil adapted to move in an arc proximate to the permanent magnet, a top plate positioned above the voice coil, and a bottom plate positioned below the voice coil. The permanent magnet has two halves that are magnetized in opposite direction. The two halves of the magnet are split into a right half magnet portion and a left half magnet portion. The right half magnet portion and the left half magnet portion are attached to the top plate and the bottom plate respectively at opposite sides of the voice coil motor. The invention also discloses a disk drive unit with such VCM. | 01-15-2009 |
| 20090046392 | Voice coil motor and hard disk drive with the same - A voice coil motor for a hard disk drive includes an inner core having an inner surface, an outer plate having an inner surface, a permanent magnet, and a coil of wire. The outer plate is positioned in spaced relation to the inner core such that a gap is defined between the inner surfaces of the inner core and the outer plate. The permanent magnet is located in the gap and attached to the inner surface of the outer plate. The coil of wire wraps around the inner core to form a solenoid coil. With such structure, the stiffness of the coil is increased. The invention also discloses a disk drive with such VCM in which the coil is directly bonded to the E-block of the hard disk drive. Therefore heat conduction of the hard disk drive is improved. | 02-19-2009 |
| 20090059435 | Voice coil damper - A voice coil for a voice coil motor of a hard disk drive comprises an inner surface of the voice coil, which bounds a central space of the voice coil. A first outer surface of the voice coil is substantially parallel to a second outer surface of the voice coil. A constrained layer damper is attached to the inner surface of the voice coil by a coupler. The constrained layer damper comprises a first constraining layer coupled to a first surface of a viscoelastic damping layer. A second constraining layer is coupled to a second surface of the viscoelastic damping layer. The constrained layer damper is curved in a direction that is substantially perpendicular to the first outer surface of the voice coil and the second outer surface of the voice coil. | 03-05-2009 |
| 20090097164 | Drive with voice coil motor - A drive is provided executing high-speed oscillatory motion. A voice coil motor in a pixel shifter includes a coil of a rectangular shape producing thrust along an axis, a flap fixing the coil, and flat springs giving to the flap an urging force against the thrust. An oscillation axis of the flap is parallel to the axis and located between another axis that is parallel and opposite to the axis and still another axis that is parallel to the axis and passes over a centroid of the coil. This reduces the value of the inertia per unit torque. | 04-16-2009 |
| 20090190265 | HARD DISK DRIVE - A hard disk drive (HDD) includes a base including a voice coil motor (VCM) which drives an actuator, a cover combined with an upper surface of the base, and a magnetic leakage flux reducer adjacent to the VCM to reduce a magnetic leakage flux leaked from the VCM. Therefore, the HDD includes a simple structure to be made light and reduces the magnetic leakage flux which affects the VCM. | 07-30-2009 |
| 20100177444 | VCM DRIVER AND PWM AMPLIFIER - The present invention provides a VCM driver realizing low power consumption and high accuracy and a PWM amplifier compensating a dead time distortion. A phase compensator, a ΔΣ modulator receiving an output signal of the phase compensator and converting the output signal to a control code of predetermined bits, a PWM modulator receiving the control code to produce a PWM signal, and an output circuit receiving the PWM signal to drive a voice coil constitute a forward path. A sense amplifier sensing a current of the voice coil, an ADC receiving an output signal of the sense amplifier, a low-pass filter receiving an output signal of the ADC, and a decimation filter receiving an output signal of the low-pass filter constitute a feedback path. An output signal of the decimation filter is fed back to the input side of the phase compensator to form a major feedback loop having a first-order characteristic loop gain. An output signal of the decimation filter is fed back to the output side of the phase compensator to form a minor feedback loop having a loop gain which is flat until a target band frequency when viewed from the output side of the phase compensator. | 07-15-2010 |
| 20100188780 | ASSEMBLY AND RECORDING MEDIUM DRIVE - According to one embodiment, an assembly includes a first member configured to have a first linear expansion coefficient, a second member configured to have a second linear expansion coefficient smaller than the first linear expansion coefficient, a pair of connecting members configured to connect the first member with the second member, and a notch configured to be formed in the second member between the connecting members and configured to reduce a sectional area of the second member on a section perpendicular to a straight line that connects the connecting members. | 07-29-2010 |
| 20100302686 | DISK DRIVE HAVING REDUCED MAGNETIC FLUX LEAKAGE - In a voice coil motor (VCM) of a disk drive, a coined feature formed on a ferromagnetic plate reduces magnetic flux leakage from a disk drive without increasing the weight of the drive or adding complexity to the manufacturing process. The coined feature is shaped and positioned to alter the path of magnetic flux lines produced by the VCM in a way that significantly reduces the flux leakage from the VCM. The coined feature may be formed without adding material to the ferromagnetic plate by the same stamping process used to fabricate the plate. | 12-02-2010 |
| 20120120529 | VOICE-COIL MOTOR WITH FLUX GUIDE CONFIGURED TO REDUCE HEAD VIBRATIONS IN A DISK DRIVE - A voice-coil motor (VCM) with a flux guide configured to reduce vibrations of a head when accessing data in a disk drive. The VCM includes at least one VCM magnet, a voice coil, and at least one flux guide. The voice coil is disposed in proximity to a magnetic pole of the VCM magnet. The flux guide is coupled to the voice coil; and, the flux guide is configured to reduce vibrations of the head when accessing data in the disk drive. | 05-17-2012 |
| 20130163123 | FEED-FORWARD COMPENSATION OF LINEAR-PULSE WIDTH MODULATOR HYBRID POWER SUPPLY - A circuit device includes a linear driver circuit, a pulse-width modulation driver circuit, an oscillator circuit having an output coupled to the pulse-width modulation circuit, and a feed-forward circuit coupled to the oscillator circuit, the feed-forward circuit being configured to adjust an output of the oscillator circuit so that an output of the PWM circuit substantially matches an output of the linear driver circuit. | 06-27-2013 |
| 20160071534 | Actuator Comb Having A Stepped Inner Bore - A head stack assembly (HSA) having an actuator comb with a stepped inner bore may have an upper portion of the inner bore with a first diameter that is greater than the diameter of a lower portion of the inner bore. Therefore, little friction and resistance is encountered when force fitting a pivot-bearing assembly into the upper portion of the stepped inner bore, thereby avoiding surface damage and the generation of unwanted debris particles. The HSA may further comprise a plurality of tolerance rings to couple the actuator comb with the pivot-bearing assembly, such as one tolerance ring positioned below the step feature and one tolerance ring positioned above and seated on the step feature of the comb inner bore. | 03-10-2016 |
| 360264900 | Magnet detail | 3 |
| 20090086377 | Actuator mechanism for magnetic disk drive - Embodiments of the present invention help provide a simple and inexpensive actuator mechanism for a magnetic disk drive. The actuator mechanism includes an approximately circular coil and a simple shaped magnet, and is capable of displaying adequate performance required for the magnetic disk drive. According to one embodiment, the magnetic disk drive includes an actuator mechanism which has an approximately circular coil and an approximately rectangular magnet. The long axis direction of the rectangular magnet is oriented in parallel to a straight line connecting the center of the inner circle of the circular coil in a state in which the actuator is positioned at the outermost circumference of a data area and the center of the inner circle of the circular coil in a state in which the actuator is positioned at the innermost circumference of the data area. | 04-02-2009 |
| 20100079916 | LOW POWER VOICE COIL MOTOR WITH A GUIDING MAGNET SHELL - A low power voice coil motor (VCM) with a guiding magnet shell comprises a magnetic device, a lens carrier, a base, a plurality of guide posts, an electromagnetic driving apparatus and a shell enclosing the lens carrier, the magnetic device and the electromagnetic driving apparatus. The shell and the magnetic device are arranged with a distance within a predetermined range and the attractive force between the magnetic device and the shell in lateral direction induces a shift of the lens carrier for added the friction force between the plurality of guide posts and walls of a plurality of holes. The added friction force is larger than a gravitational force from a total weight of the magnetic device, the lens carrier and a lens set held by the lens carrier, and/or an upward attractive force of the shell on the magnetic device, so the lens set can be fixed at a position even if power is turned off. | 04-01-2010 |
| 20120113548 | VOICE COIL MOTORS AND MAGNETIC CIRCUITS THEREFOR - A magnet of rectangular prism of parallelepiped prism shape is disposed on a yoke having a triangle shape or a frusto-triangular shape to construct a magnetic circuit for a voice coil motor. The magnetic circuits facilitate positioning and holding of a moving coil, and the voice coil motor is improved in positioning precision of a magnetic head. | 05-10-2012 |
| 360265000 | Winding detail | 1 |
| 20080231995 | Assembled Magnetic Energy Generator as Well as Its Magnetic Light - A wrapper type combined magnetic energy generator and a magnetic energy lamp of the present invention belong to the field of illumination. Especially, it is a magnetic energy generator used in the magnetic energy lamp that can produce the electromagnetic energy to excite the illuminative devices. The magnets of the magnetic energy generator are two split type combined magnets. More than one flute is provided on one side of one magnet and the flutes of the two magnets correspond to each other. The fixed spaces are produced between the two flutes of the two magnets. The spaces are communicated with the two flutes to be located exactly. The lamp body of the magnetic energy lamp is provided and fixed on the magnetic energy generator. These two split type combined magnets of the magnetic energy generator wrap the hollow lamp body of the magnetic energy lamp, respectively. The structure of the present invention is simple. It can be made easily and its cost is low. So it provides a reliable technique implementation project for the large-scale industrialization. | 09-25-2008 |
| 360265100 | Limiter/stop | 3 |
| 20080204941 | HARD DISK DRIVE HAVING CRASH STOPPER AND METHOD OF ASSEMBLING THE SAME - A hard disk drive includes a base, a head stack assembly (HSA) that is mounted to the base so as to be rotatable relative to the base, a voice coil motor (VCM) block that has an upper section and a lower section respectively disposed above and below a voice coil support of the HSA, and a crash stopper that limits the rotation of the HSA at the voice coil support. The upper section of the VCM block has a through-hole through which the crash stopper extends into a space between the upper and lower sections of the VCM block. The lower section of the VCM block has a groove in which the crash stopper is received. The hard disk drive can be assembled in a top down manner to allow the assembly process to be fully automated. | 08-28-2008 |
| 20100134927 | ACTUATOR STOPPER AND STORAGE APPARATUS - According to one embodiment, an actuator stopper contacts a butting portion of an actuator which moves a head in a movement direction in a movement plane, and restricts a movement range of the actuator along the movement direction. The actuator stopper includes a first portion and a second portion. The first portion is configured to be positioned at an upstream side along the movement direction and contact the butting portion of the actuator. The second portion is configured to be positioned at a downstream side along the movement direction, have a smaller height than the first portion along a direction vertical to the movement plane, and be formed integrally with the first portion. | 06-03-2010 |
| 20100246070 | HEAD STACK ASSEMBLY AND HARD DISK DRIVE HAVING THE SAME - A hard disk drive includes a head stack assembly including a read/write head mounted thereon and an actuator arm pivoting over a disk around a pivot shaft installed on a base, a pivot shaft holder rotatably supporting the pivot shaft and to which the actuator arm is coupled, and a bobbin provided at the opposite side of the actuator arm with respect to the pivot shaft holder and having a voice coil motor coil installed on at least one surface thereof, a crash stop coupled to the base and restricting displacement of the actuator arm, and a contact area reduction portion provided on at least one of the bobbin and the crash stop and including at least one non-contact section, in which the bobbin and the crash stop do not contact each other, in a contact section of the bobbin and the crash stop, when the bobbin and crash stop contact each other, to reduce the contact area between the bobbin and the crash stop. | 09-30-2010 |
| 360265200 | Bearing | 7 |
| 360265600 | Mounting detail | 7 |
| 20080266717 | MOUNTING ASSEMBLY - A tolerance ring ( | 10-30-2008 |
| 20090279211 | Bearing apparatus for a hard disk drive - A low cost method of attaching an actuator arm assembly to a single head hard disk drive that has a reduced part count The actuator arm assembly includes a suspension arm stamped from a metal and a pivot bearing cartridge contained by a reduced mass outer sleeve. | 11-12-2009 |
| 20090296282 | TOLERANCE RING FOR DATA STORAGE WITH CUT-OUT FEATURE FOR MASS CONTROL - A tolerance ring configured to improve mass eccentricity of an actuator arm assembly. The tolerance ring has a cylinder with a predetermined length between two ends, with a gap along the predetermined length of the cylinder, the gap having a first and a second edge, the cylinder having an aperture in the surface of the cylinder at the second edge. | 12-03-2009 |
| 20100039733 | INTEGRATED PIVOT-CARRIAGE - An integrated pivot-carriage for a hard-disk drive. The integrated pivot-carriage includes a carriage having a center-bore with an integrated bearing-spacer portion. The integrated pivot-carriage also includes a pivot-shaft configured to provide support for rotation of the carriage. The pivot-shaft is disposed within the center-bore of the carriage. In addition, the integrated pivot-carriage includes at least one raceless ball-bearing that is configured to allow rotation of the carriage about the pivot-shaft. The raceless ball-bearing is disposed between the pivot-shaft and the carriage. | 02-18-2010 |
| 20120087044 | TOLERANCE RING WITH EDGE BUMP DIFFERENCE - A novel tolerance ring includes a hollow cylindrical body defining a longitudinal axis that passes axially through its center. A circumferential gap divides the hollow cylindrical body so that the hollow cylindrical body includes first and second longitudinal edges that define the circumferential gap. A plurality of bumps protrude radially from the hollow cylindrical body, and consists of a plurality of gap-adjacent bumps and a plurality of non-gap-adjacent bumps. At least one of the plurality of bumps is circumferentially between the gap and each of the non-gap-adjacent bumps. None of the plurality of bumps is circumferentially between the gap and each of the gap-adjacent bumps. The tolerance ring includes a means for increasing an otherwise lower average radial compressive stiffness of the gap-adjacent bumps to become substantially equal to an average radial stiffness of the non-gap-adjacent bumps. | 04-12-2012 |
| 20130128389 | MOUNTING ASSEMBLY - A tolerance ring is disclosed and can include a strip of material having a length, a first end, a second end opposite the first end, and a plurality of radially extending projections between the first and second ends. The strip of material can be curved into a ring having a gap. The radially extending projections are configured to be compressible between a bore and a shaft. A width and/or a height of a radially extending projection closest to the first end is different from a width and/or a height of a radially extending projection closest to a line extending perpendicular to the length and bisecting the strip of material within a circumferential row of the radially extending projections. | 05-23-2013 |
| 20160118068 | PIVOT ASSEMBLY BEARING AND HARD DISK DRIVE DEVICE - A pivot assembly bearing includes a shaft, a sleeve provided coaxially with the shaft, and a pair of rolling bearings arranged to be separated from each other in an axial direction between the shaft and the sleeve. The sleeve includes a ventilation path configured to communicate a region surrounded by the shaft, the pair of rolling bearings, and the sleeve with the outside of the sleeve. | 04-28-2016 |
| 360265700 | E block detail | 2 |
| 360265900 | Detail of actuator arm supporting head suspension | 2 |
| 20090002894 | Outer actuator arm constrained layer dampers - Outer arm constrained layer dampers to improve actuator dynamics are disclosed. One embodiment provides a housing and disk pack mounted to the housing and having a plurality of disks that are rotatable relative to the housing. In addition, an actuator is coupled to the housing, the actuator having a plurality of suspensions arms for reaching over the plurality of disks. A first damper is coupled with an outside (or inside) portion of a top outside suspension arm of the plurality of suspensions arms. In addition, a second damper is coupled with an outside (or inside) portion of a bottom suspension arm of the plurality of suspensions arms. In so doing, vibration modes involving deformation of the top suspension arm and the bottom suspension arm are damped. | 01-01-2009 |
| 20100027166 | REDUCING FLEX CABLE OSCILLATION - A method of reducing oscillation at the read write element of a hard disk drive, is described. In one embodiment, a flex cable for conducing data signals from a head stack assembly to a connector is provided. One or more weights are then coupled with the flex cable at one or more predetermined locations. The one or more predetermined locations are selected based upon mass distribution along the flex cable. | 02-04-2010 |
| 360266200 | Linear head movement | 12 |
| 20080253030 | ROTATIONAL BASED ACTUATOR CONFIGURED TO IMPART LINEAR MOVEMENT - A rotational based actuator configured to impart linear movement. The actuator may be suitable for use in any number of applications where a disk or other feature may be rotated over a wedge to impart linear movement. The forces used to generate the rotation movement may be imparted by the wedge against an element, causing the element to move linearly with the disk. | 10-16-2008 |
| 360266300 | Electrical connection detail onto actuator arm | 1 |
| 20100277835 | PRINTED CIRCUIT BOARD AND MAGNETIC HEAD DRIVING DEVICE INCLUDING THE SAME - A plurality of wiring traces are formed on a base insulating layer, and a metal layer is formed on the opposite surface of the base insulating layer. Two adjacent wiring traces constitute a transmission line pair. The width of the wiring trace is set to not more than 250 μm, and the distance between the adjacent wiring traces is set to not less than 8 μm. The thickness of the base insulating layer is selected to cause differential impedance of the transmission line pair to be not less than 10Ω and not more than 50Ω. | 11-04-2010 |
| 360266400 | Voice coil | 9 |
| 20090080115 | VCM DRIVER AND PWM AMPLIFIER - The present invention provides a VCM driver realizing low power consumption and high accuracy and a PWM amplifier compensating a dead time distortion. A phase compensator, a ΔS modulator receiving an output signal of the phase compensator and converting the output signal to a control code of predetermined bits, a PWM modulator receiving the control code to produce a PWM signal, and an output circuit receiving the PWM signal to drive a voice coil constitute a forward path. A sense amplifier sensing a current of the voice coil, an ADC receiving an output signal of the sense amplifier, a low-pass filter receiving an output signal of the ADC, and a decimation filter receiving an output signal of the low-pass filter constitute a feedback path. An output signal of the decimation filter is fed back to the input side of the phase compensator to form a major feedback loop having a first-order characteristic loop gain. An output signal of the decimation filter is fed back to the output side of the phase compensator to form a minor feedback loop having a loop gain which is flat until a target band frequency when viewed from the output side of the phase compensator. | 03-26-2009 |
| 20100061022 | SYSTEM AND METHOD OF CURRENT SHAPING CONTROL FOR RETRACT - A system for implementing current shaping for retract of a voice coil motor (VCM) includes drive circuitry coupled to drive the VCM according to a logic state of the system. Current shaping circuitry is configured to temporarily decrease the bandwidth of a VCM transconductance loop in response to a control signal. The transconductance loop includes at least the VCM, the current shaping circuitry and the drive circuitry. The system also includes logic configured to provide the control signal at an end portion a drive logic state to enter a current shaping logic state as a transition from the drive logic state to a floating logic state to reduce current through the VCM such that acoustic emissions from the VCM are mitigated during the retract. | 03-11-2010 |
| 20110032643 | EXCHANGE COUPLED COMPOSITE (ECC) PMR MEDIA WITHOUT PROTECTIVE LAYER THROUGH SOFT-FERRITE - A disk for a hard disk drive. The disk includes a first magnetic layer supported by a substrate and an intermediate layer adjacent to the first magnetic layer. The disk also includes a second magnetic layer that is adjacent to the intermediate layer and includes barium. The barium second magnetic layer has a mechanical hardness so that a protective layer such as COC is not required for the disk. | 02-10-2011 |
| 20110069415 | METHOD AND APPARATUS FOR DETECTING RAPID OF TRACK FOLLOWING AND PROTECTING NEARBY TRACKS FROM RAPID OFF TRACK WRITING IN A HARD DISK DRIVE - This application discloses a hard disk drive using a self-resonant frequency band of a Voice Coil Motor far above its operational frequency band to predict Rapid Off Track events before its head stack assembly can deliver the disruption to the slider writing a track. A circuit board and/or an integrated circuit are disclosed in various embodiments to predict the ROT events using the self-resonant frequency band and/or to respond to the prediction to suppress the slider writing. | 03-24-2011 |
| 20150138676 | Apparatus, Systems and Processes For Reducing a Hard Disk Drive's Access Time and Concomitant Power Optimization - Rotational latency is reduced in a standard conventional form factor HDD system by replacing, for example—the prior art rotary arm actuator of a conventional HDD, with one or more belts and pulleys and one or more read/write heads mounted on, or otherwise associated with the belts. Multiple scaled iterations facilitate energy savings and power optimized systems, without compromise to data access performance. | 05-21-2015 |
| 360266500 | Carriage detail | 4 |
| 20090244784 | STORAGE APPARATUS - A storage apparatus includes a magnetic circuit applying driving force to a carriage. The magnetic circuit includes a first yoke provided with a magnet. An end of the first yoke is secured using a first fastening member screwed in a threaded hole in an end of the base. A second yoke is opposed to the first yoke, and an end of the second yoke is secured using a second fastening member screwed in a threaded hole in another end of the base. A driving coil is held by the carriage and disposed between the first yoke and the second yoke so that the first yoke and the second yoke are attracted to each other by magnetic force of the magnet. | 10-01-2009 |
| 20090262462 | STORAGE APPARATUS - A carriage block body is coupled to a support shaft for relative rotation. The carriage block body defines a bearing hole receiving the support shaft. A carriage arm extends from the carriage block body along an imaginary plane perpendicular to the longitudinal axis of the support shaft. The carriage arm has a wall surface defining a cylindrical space at the tip end of the carriage arm. A projection is formed on the wall surface at a position off an intermediate plane set perpendicular to the longitudinal axis of the cylindrical space so that the cylindrical space is equally divided into a first cylindrical space and a second cylindrical space by the intermediate plane. The projection protrudes into the first cylindrical space. | 10-22-2009 |
| 20120162826 | DAMPER WITHIN A VOICE COIL MOTOR - A hard disk drive including a plurality of magnetic disks and a voice coil motor. The voice coil motor includes a coil and a first damper plate for dampening vibrations generated by the coil. The first damper plate is disposed within the voice coil motor. | 06-28-2012 |
| 360266600 | Guide detail | 1 |
| 20090190266 | Magnetic disk drive and voice coil motor - Embodiments of the present invention help to reduce out-of-plane excitation force exerted on a coil in a voice coil motor of a magnetic disk drive, so that vibration of a magnetic head is suppressed. According to one embodiment, a voice coil motor has a flat magnet that faces a coil, and generates a magnetic field, and yokes that apply the magnetic field generated by the magnet to the coil. The magnet is provided with a magnetic flux guiding section, absorbing leakage flux from the magnet, on a most distal end of the magnet as viewed from a pivot axis. A most distal part of the coil as viewed from the pivot axis, may be situated in an outer side with respect to the most distal end of the magnet, and the magnetic flux guiding section is provided between the most distal end of the magnet and the most distal part of the coil. | 07-30-2009 |
| 360267000 | Band | 1 |
| 20090316307 | METHOD AND APPARATUS TO IMPROVE CHANNEL QUALITY FOR USE IN WIRELESS COMMUNICATIONS SYSTEMS WITH MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) ANTENNAS - Apparatus and method that employ a technique which improves SINR in a communication system utilizing MIMO antennas are described. Transmitter and receiver components use fixed transmit and receive beamforming matrices and variable transmit and receive beamforming vectors. A method of channel conditioning using an iterative closed loop process is also described. | 12-24-2009 |
