Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8134798 | Disk drive maintaining a substantially constant host transfer rate when reading data from varying data rate data tracks across multiple disk surfaces A disk drive is disclosed having a plurality of disk surfaces, wherein each disk surface comprises a plurality of data tracks, and each data track comprises a plurality of data sectors. When a read command is received from a host, data is read from first and second ... | 03/13/2012 |
| 8035914 | Hard disk drive and method for designing additional controller included in hard disk drive A hard disk drive is provided. The hard disk drive comprises a plant configured to drive the hard disk drive, a main controller configured to control the plant, and an additional controller connected in parallel with the main controller. A response function in consi... | 10/11/2011 |
| 8009383 | Seek control method to avoid flex cable resonance during settle in hard disk drive A hard disk drive with a circuit that can perform a seek routine by providing a seek current to a voice coil motor. The voice coil motor is coupled to a head that is coupled to a disk. The seek current provides a predetermined number of harmonics. The number of harm... | 08/30/2011 |
| 7986489 | Disk controller, disk drive device, and disk control method According to one embodiment, a disk controller includes a receiver, a read-modify-write controller, and a wait controller. The receiver receives data in units of predetermined data length. The read-modify-write controller performs a read-modify-write operation when ... | 07/26/2011 |
| 7885033 | Anticipatory track switching Various embodiments of the present invention are generally directed to using a transducer to transfer data during a transducer displacement operation at a time during such operation when the transducer is substantially stationary. ... | 02/08/2011 |
| 7881009 | Positioning of plants in servo systems Apparatus is provided for fast-adjustment of the position of a plant in a servo system in which a servo output indicative of the plant position is provided to a positioning system for positioning the plant in dependence on the servo output. The apparatus includes an... | 02/01/2011 |
| 7859788 | Hard disk drive (HDD), method improving read hit ration in HDD, and medium recording computer program performing method In a method of improving read hits to pre-fetch data stored in a memory associated with a hard disk drive (HDD). The method includes; receiving a read command indicating a target sector on a disk in the HDD, obtaining a latency time in relation to a movement time an... | 12/28/2010 |
| 7633706 | Servowriter contact torque control Servo writer apparatus and associated method for writing servo information to a data storage device. The servo writer has an external positioner configured for contactingly positioning the actuator in relation to the storage medium. The servo writer furthermore has ... | 12/15/2009 |
| 7633707 | Passive test circuit used to determine a back EMF of a voice coil motor during application of a bias voltage A hard disk drive with a voice coil motor coupled to a head. The head moves relative to a disk. The voice coil motor receives a biasing voltage and has a back emf voltage. A test circuit is coupled to the voice coil motor to determine the back emf voltage. The back ... | 12/15/2009 |
| 7630163 | Storage device and seek control method A storage device includes a storage unit, a timer unit and a bias current applying unit. The storage unit stores, in advance, a value of a waiting time until application of a bias current to the driving unit to eliminate an external force applied to an actuator afte... | 12/08/2009 |
| 7626782 | Disk drive employing iterative learning control for tuning seek servo loop A disk drive is disclosed operable to seek a head from a first radial location over a disk to a second radial location over the disk. A reference signal is initialized, a feed-forward control signal is initialized, and a seek is initiated. During the seek operation,... | 12/01/2009 |
| 7619848 | Method of searching to find a servo pattern corresponding to a servo pattern copy process A method of searching to find a servo pattern corresponding to a servo pattern copy includes unparking a magnetic head and moving the magnetic head onto an intermediate area of a rotating disk, moving the magnetic head to a servo pattern copy start area by applying ... | 11/17/2009 |
| 7605998 | Settling judgment method for positioning control device, positioning control device and disk apparatus A settling judgment method judges whether an object is settled at a target position by using a settlement judgment formula set a slice value and number of continuous samples. The slice and number of continuous judgments of the judgment value of the settling judgment... | 10/20/2009 |
| 7602580 | Commutational ramp loading apparatus and method An apparatus and method for loading and offloading a read/write head from a load ramp onto a disc are disclosed. The apparatus includes at least a basedeck supporting a spindle motor with an attached disc and an actuator assembly with a read/write head configured fo... | 10/13/2009 |
| 7593180 | HDD data read control apparatus, medium, and method A hard disc drive (HDD) data read control apparatus, medium, and method reading data from a disc having non-uniform track-to-track spacing. The data read control method of the HDD, in which data is read from a disc including non-uniform track-to-track spacing, inclu... | 09/22/2009 |
| 7586713 | Control apparatus, storage apparatus, and head control method A control apparatus, storage apparatus and control method uses a correction value for head position written in a recording medium to control head position and prevents a use of a correction value that has improperly been read out. The apparatus comprises: an allowab... | 09/08/2009 |
| 7576943 | Magnetic disk drive with positioning control system Embodiments in accordance with the present invention relate to a positioning control system of a magnetic disk drive. Even if there is no phase correlation in a specific vibration component before and after a seek operation of a magnetic head, a resonance filter in ... | 08/18/2009 |
| 7561373 | Bias compensation method and appropriate bias force profile generation method, recording media and hard disk drive Provided is a method of compensating for a bias for efficient servo control of a hard disk drive, and optimally compensating for bias force based on the elapsed usage time of a hard disk drive, and a bias force profile generation method, recording media, and a hard ... | 07/14/2009 |
| 7538971 | Microactuator control adjustment using temperature sensor measurements Embodiments of the present invention allow for controlling a microactuator based at least in part on an output of a temperature sensor. Also, embodiments of the present invention allow for adjusting a control of a microactuator so as to compensate for changes in a g... | 05/26/2009 |
| 7538970 | Storage apparatus, storage apparatus control method, and computer product A seek-information storing unit stores seek information including a correlation between a seek distance indicating a shift distance from a current track to a target track where a target frame for a data input/out is located and a seek time indicating a shifting time... | 05/26/2009 |
| 7489471 | Bias calculation, bias compensation, and bias table editing methods for HDD, recording media storing computer programs for executing the same, and HDD using the same In a hard disk drive (HDD), biases are measured across all zones of a disk, and nonlinear bias components are extracted. Upon a change in operational condition of the HDD, biases are measured at two reference positions on the disk so as to estimate a corresponding c... | 02/10/2009 |
| 7460330 | Settling judgment method for positioning control device and positioning control device In a settling judgment method for judging whether an object is settled in a target position, the settlement is judged accurately at high-speed. In a positioning device for controlling a position of an object using a position error between a target position and a cur... | 12/02/2008 |
| 7460331 | Seek control method, seek control device and medium storage device In a seek control device based on a current observer control which performs two degree of freedom control, a current step difference to be generated when seek control is switched to following control is prevented. When seek control is switched to following control, ... | 12/02/2008 |
| 7460329 | Feedforward compensator for induced vibration A feedforward compensator for induced vibration is disclosed. Controlled motions in an actuator induce mechanical disturbances in a surrounding cabinet. The feedforward compensator allows such disturbances to be compensated for without the need of a vibration sensor... | 12/02/2008 |
| 7440225 | Disk drive employing pivot friction compensation A disk drive is disclosed including a disk having a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors forming N servo wedges, and a wedge time period (WTP) occurs between each servo wedge. A VCM control signal is generated by... | 10/21/2008 |
| 7440218 | Charge remover for magnetic disk A loading/unloading type magnetic disk unit includes a magnetic disk that is rotated or driven by a motor, and a head slider bearing a magnetic head and being movable above the magnetic disk owing to a driving mechanism. Herein, at least one projection made of a hig... | 10/21/2008 |
| 7436614 | Data storage device and data storage device control Embodiments of the invention provide a data storage device and its control method that are capable of minimizing the possibility of head deterioration while maintaining the minimum required sustained data rate. In one embodiment, each track is divided into three are... | 10/14/2008 |
| 7430089 | Data storage device and write processing method for data storage device A data storage device executes sector guarantee processing at an unexpected power supply disconnection. The sector guarantee processing can be accurately performed even if the fluctuation of power supply voltage during normal operation is high. The voltage of the po... | 09/30/2008 |
| 7423838 | Servo control method and apparatus suitable for the same A servo control method of controlling a plant to track a reference trajectory with enhanced accuracy using a reference signal and its derivative signals, an apparatus and a recording medium suitable for same. The servo control method includes: determining a polynomi... | 09/09/2008 |
| 7423836 | Settling judgment method for position control device and position control device In a settling judgment method for judging whether an object is settled at a target position, a margin for settling judgment is expanded, and settling is judged accurately. As the settling judgment formula of the settling judgment block, both the position error and t... | 09/09/2008 |
| 7420765 | Seek control apparatus, seek control method and storage apparatus A seek control apparatus for performing a seek control of a head comprises an MCU that acquires control information corresponding to the externally indicated data length out of the control information stored in a storage section storing the control information for s... | 09/02/2008 |
| 7417821 | Information recording apparatus According to embodiments of the present invention, tracks can be formed on a magnetic recording medium on a zonal area at intervals of either a first track pitch or a second track pitch, both of which differ from each other. For a reference track defined in each zon... | 08/26/2008 |
| 7400467 | Methods and apparatus for managing write inhibit in response to a predictive metric Methods of controlling reading/writing by a read/write head of a disk drive include generating a position error signal indicative of a displacement of the read/write head from a desired radial location on a surface of a data storage disk. A control signal for moving... | 07/15/2008 |
| 7397629 | Systems and methods for regulating hard disk drive operation in cold temperatures A cold seek governor process for a hard disk drive includes regulating delay between seek operations when temperature of the disk drive is below a threshold temperature. ... | 07/08/2008 |
| 7397625 | Large protrusion recording head for controlled magnetic spacing recording/reading A magnetic head structure having enhanced protrusion and having a first pole structure, a second pole structure forming a yoke with the fist pole, a coil structure disposed in the yoke, and a layer of partially cured polymer operatively coupled to the yoke. Also dis... | 07/08/2008 |
| 7394607 | Disk drive with position detection Embodiments of the invention provide a disk drive capable of writing information on data tracks even more positively when a shingle write method is adopted. In one embodiment, the disk drive is characterized in that, when information is to be written on a plurality ... | 07/01/2008 |
| 7394613 | Control device, disk device, and seek orbit generation method A waveform generator generates an acceleration orbit, a velocity orbit, and a position orbit from the seek time. Each orbits multiplied by respective gains, whereupon the orbits are synthesized by a first adder. The resulting composite orbit is multiplied by a seek ... | 07/01/2008 |
| 7385777 | Data storage device with heater, and control method therefor with timing control Embodiments of the invention reduce a possibility that a head will collide with a medium when the clearance between the head and the medium is adjusted by using a medium, and sufficiently reduce the clearance even at an initial stage of accessing a data area. In one... | 06/10/2008 |
| 7382563 | Storage apparatus, and control method and program Upon obtaining a detection signal of a shock sensor that detects a shock applied to an apparatus for output, a write disabling unit disables writing by a head on a medium over a predetermined time corresponding to a shock convergence. A determining unit determines, ... | 06/03/2008 |
| 7382566 | Magnetic disk protection mechanism, computer system comprising protection mechanism, protection method for magnetic disk, and program for protection method A mechanical transport device includes a system for transport; and a hard disk drive attached to the system. The hard disk drive comprises a magnetic recording disk to record data, a head to read or write the data to or from the disk, and a drop sensor designed to s... | 06/03/2008 |
