| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360270000 | For moving head during transducing | 8 |
| 360271000 | Tape record having rotary head | 2 |
| 360271100 | Rotating drum | 1 |
| 20080304185 | Drum assembly associated with video tape machine - A method of manufacturing a drum assembly associated with a digital betacam video tape machine is disclosed. The method includes providing a helical scan drum assembly having a stationary upper drum, a stationary lower drum and a plurality of rotating read/write heads disposed between the stationary upper and lower drums. The rotating read/write heads reading and writing digital information to and from a tape. The method further includes inserting air grooves in the outer peripheral surface of the upper drum. The air grooves are configured to reduce sticktion between the tape and the outer peripheral surface of the upper drum when the tape is moved around the outer peripheral surface of the upper drum. The method additional includes mounting an adjustable band to the outer peripheral surface of the lower drum. The adjustable band is configured to guide the tape around the drum assembly in accordance with helical scans when the tape is moved around the outer peripheral surface of the upper drum. | 12-11-2008 |
| 360272000 | Power supply | 1 |
| 20080239581 | Apparatus for determining contact of head slider and method of determining contact of head slider - An AC power source is connected to a write coil mounted on a head slider for determination of contact of a head slider with a storage medium. The AC power source outputs the alternating current having a specific frequency. A measuring circuit measures a sequence of indices for the alternating current supplied to the write coil. A component corresponding to the specific frequency is extracted from the sequence of the indices. This serves to eliminate components corresponding to frequencies other than the specific frequency, namely noise. A detecting circuit detects contact between the head slider and the storage medium based on a change in the amplitude of the sequence appearing at the specific frequency. The contact can thus reliably be detected between the head slider and the storage medium. | 10-02-2008 |
| 360274000 | Disk record | 6 |
| 20090185313 | HARD DISK DRIVE - A hard disk drive includes a magnetic retractor situated at and integrated with the pivot holder of a head stack assembly. An actuator arm of the head stack assembly supports a read/write head, a bobbin supports a voice coil of a voice coil motor, and the actuator arm and bobbin extend in generally opposite directions from pivot holder. The pivot holder receives a pivot such that the actuator arm can be rotated about an axis of the pivot. The voice coil motor also includes a pair of magnets (permanent magnet). The retractor interacts with the magnets of the voice coil motor to generate a retract force which urges the actuator arm to a position at which the read/write head is parked. By providing the retractor on the pivot holder, the retract force will always be close to that specified according to the design of the drive. Therefore, the read/write head is not only prevented from being unintentionally released while it is parked, but is also assuredly moved towards a target position over the disk when power is supplied to the voice coil motor to initiate a read/write operation. | 07-23-2009 |
| 20100188781 | MAGENTIC CIRCUIT FOR VCM AND STORAGE DEVICE - According to one embodiment, a storage device includes at least one disk rotated by a spindle motor on a base formed of a magnetic material, a head actuator configured to access the disk, and a VCM configured to drive the actuator. A magnetic circuit of the VCM includes a top yoke with a flat plate-shape, a top magnet attached to a surface of the top yoke on the base side, and support portions formed on the base, and configured to support the top yoke, the top yoke being magnetically coupled to the support portions. | 07-29-2010 |
| 20110069416 | Spindle motor - A spindle motor according to an aspect of the invention may include: a base on which a sleeve is mounted; a rotor bound together with a shaft rotatably mounted on the sleeve and rotating by electromagnetic interaction with the stator; a pulling plate mounted on the base to generate a magnetic force in a rotary axis direction of the rotor; and an escape portion provided on the base at a position corresponding to the pulling plate and providing a space into which an adhesive may escape when bonding the pulling plate. | 03-24-2011 |
| 20110235215 | PATTERNED MAGNETIC RECORDING DISK WITH HIGH BIT-ASPECT-RATIO AND MASTER MOLD FOR NANOIMPRINTING THE DISK - A method for making a master mold that is used in the nanoimprinting process to make patterned-media disks with patterned data islands uses guided self-assembly of a block copolymer into its components. Conventional or e-beam lithography is used to first form a pattern of generally radial stripes on a substrate, with the stripes being grouped into annular zones or bands. A block copolymer material is then deposited on the pattern, resulting in guided self-assembly of the block copolymer into its components to multiply the generally radial stripes into generally radial lines. Various methods, including conventional lithography, guided self-assembly of a second block copolymer, and e-beam lithography, are then used to form concentric rings over the generally radial lines. After etching and resist removal, the master mold has a pattern of either pillars or holes, depending on the method used. | 09-29-2011 |
| 20110299197 | HARD DISK DRIVE - In a hard disk drive, for the purpose of solving a problem that a mass of the tip of a VCM actuator increases, a primary resonance frequency lowers and a control band lowers in a case where a balance driving mechanism which damps a vibration during the driving of a microactuator is mounted, a damping unit using a displacement enlargement mechanism by resonance is disposed to obtain a sufficient damping effect with a small mass, thereby setting a resonance frequency of the damping unit to be higher than a frequency of a resonance peak of a damping object. | 12-08-2011 |
| 20120162827 | VOICE-COIL MOTOR WITH VOICE COILS CONFIGURED TO REDUCE HEAD VIBRATIONS IN A DISK DRIVE - A voice-coil motor (VCM) with voice coils configured to reduce vibrations of a head when data is accessed on a disk in a disk drive. The VCM includes at least one VCM magnet and a voice-coil assembly. The voice-coil assembly includes a first voice coil and at least a second voice coil. The first voice coil is disposed in proximity to a magnetic pole of the at least one voice-coil-motor magnet. The second voice coil is disposed in close proximity to the first voice coil such that the first voice coil substantially overlays the second voice coil. The first voice coil and the second voice coil are configured to reduce vibrations of the head when data is accessed on a disk in the disk drive. A rotary actuator including the voice coils and a disk drive including the VCM are also provided. | 06-28-2012 |
