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| 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 |
| 7062775 | Actuator for an optical pickup A magnet used for an actuator of an optical pickup has a magnetization pattern with two different pole areas adjacent each other. At a corner part defined by the boundary line of the two pole areas, the pole area inside the corner part has a projection area, project... | 06/13/2006 |
| 7007996 | Lock of information reproducer for car In a lock of information reproducer for car, when a passenger or a driver stays in a car, in more detail, only when a car key is inserted into a car key holder (power of the car is ON), an information reproducer can be detached from a contact support unit, when the ... | 03/07/2006 |
| 6914755 | Disk unit, yoke built in disk unit and process of manufacturing same A disk unit has a voice coil motor to oscillate a suspension arm mounted at the leading end of a head with respect to a disk. The voice coil motor has a voice coil integrally attached to the tail end of the suspension arm, a magnet to cause a magnetic field to act o... | 07/05/2005 |
| 6654207 | Self-positioning magnetic latch Disclosed is a magnetic latch for a disc drive. Upper and lower voice coil magnet pole pieces include extensions which bend toward one another, defining a gap therebetween. The gap creates a magnetic field which attracts and holds a disc drive actuator in... | 11/25/2003 |
| 6442003 | Actuator for data storage device A linear actuator for a removable cartridge magnetic disk drive includes a center guide rail on which the actuator carriage travels. Bushings and the motor coil are spaced symmetrically with respect to the heads so that the center of mass, center of frict... | 08/27/2002 |
| 6369990 | Recording/reproducing device with read/write head carriage supporting voice coil of voice coil motor for driving the carriage assembly In a recording/reproducing device for use in recording and reproducing data on and from a recording medium while moving read/write head means relative to the recording medium in a moving direction, which comprises a carriage supporting the read/write head... | 04/09/2002 |
| 6285530 | Guided driving device for a moving head A drive section is disposed on only one side of a moving member. In the drive section, a coil is disposed sideways of a support portion so as to be in a vertically long state, and a guide portion is provided on an upper surface of the coil so as to extend... | 09/04/2001 |
| 6278586 | Recording/reproducing device with read/write head carriage supporting voice coil of voice coil motor for driving the carriage assembly In a recording/reproducing device for use in recording and reproducing data on and from a recording medium while moving read/write head means relative to the recording medium in a moving direction, which comprises a carriage supporting the read/write head... | 08/21/2001 |
| 6198605 | Return path geometry to enhance uniformity of force on a linear actuator Narrow gaps near the end of travel of a linear actuator coil of a magnetic disk drive is disclosed. The gaps are formed between actuator magnets and inner return path members on opposing sides of an actuator carriage. The narrow gaps are formed by protrus... | 03/06/2001 |
| 6084750 | Recording/reproducing device with read/write head carriage supporting voice coil of voice coil motor for driving the carriage assembly In a recording/reproducing device for use in recording and reproducing data on and from a recording medium while moving read/write head means relative to the recording medium in a moving direction, which comprises a carriage supporting the read/write head... | 07/04/2000 |
| 6005752 | Magnetic data recording/reproducing device having a linear motor which includes a pair of coils integrally assembled with a carriage assembly on both sides thereof In a magnetic data recording/reproducing device comprising a linear motor mounted on a main plate for driving a carriage assembly having a magnetic head, the linear motor comprises a pair of coils integrally arranged with the carriage assembly on both sid... | 12/21/1999 |
| 5943194 | Laminated steel return path with actuator support features A voice coil actuator return path for a linear actuator of a disk drive, which accurately and precisely positions the center guide track is disclosed. The outer return path is precisely formed from laminas of low carbon steel. The outer return path suppor... | 08/24/1999 |
| 5896250 | Head transport mechanism for disc drive apparatus A head transport mechanism for reciprocating a carriage in a radial direction of a disc using a linear motor as a drive source is disclosed. In the head transport mechanism, cylindrical projections are formed on a support plate, threads are cut on the inn... | 04/20/1999 |
| 5822157 | Magnetic data recording/reproducing device with voice coil motor having center yoke back yoke with bent portions and permanent magnet arranged to generate magnetic fields In a magnetic data recording/reproducing device comprising a voice coil motor for use in driving a carriage assembly having a magnetic head for recording and reproducing data on and from a disk-shaped magnetic recording medium, the voice coil motor compri... | 10/13/1998 |
| 5818666 | Linear drive motor apparatus for adjusting the relative position between and second yokes of a pair of magnetic circuits A linear motor drive apparatus for moving a head carriage in a direction perpendicular to tracks on a recording medium includes a permanent magnet, first yoke for supporting the permanent magnet, a second yoke, and a coil fixed on the head carriage and wo... | 10/06/1998 |
| 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 |
| 5325251 | Planar actuators using low pressure air bearings and rolling flexure bearings A low pressure air bearing and rolling flexure bearing support for relative movement of carriage actuators in a disk drive system. Air generated by the disk rotation or by a simple blower mounted on the spindle is directed through conduits in the carriage... | 06/28/1994 |
| 5299083 | Read/write head positioning mechanism for flexible disk drive device A flexible disk apparatus is provided, which comprises a carriage including a read/write head at the tip end thereof and a coil bobbin disposed at the other end thereof, the coil bobbin permitting a voice coil to be connected integrally therewith. The sid... | 03/29/1994 |
| 5293290 | Stackable linear actuator using embedded coil carriages A stackable linear actuator using flat, planar carriages. Each carriage is formed of two thin fiber reinforced outer surfaces having a low density composite core between each of the outer surfaces. A flat single layer coil is mounted within the composite ... | 03/08/1994 |
| 5267111 | Voice coil motor with discrete flux paths In a voice coil motor having a voice coil, and a magnetic circuit which generates a magnetic flux traversing the voice coil; the magnetic circuit includes a yoke which is divided so as to form a plurality of magnetic paths traversing the voice coil and wh... | 11/30/1993 |
| 5189660 | Optical data storage system with unitary ferrous frame A moving coil, linear positioning transducer actuator suitable for optical recording and playback devices is constructed by forming the actuator frame, magnetic pole pieces and the magnetic core of the moving coil from a single piece of ferrous material a... | 02/23/1993 |
| 5136446 | Apparatus for movably supporting and positioning a transducer A transducer driving apparatus symmetrically supports a transducer with soft members each being elastically deformed into circular-arc shape about an axis in a direction perpendicular to the transferring direction of the transducer. The rigidity of each o... | 08/04/1992 |
| 5130873 | Head positioning apparatus for disc unit A head positioning apparatus for a disc unit which moves a carriage having a movable portion by driving motors constituted by coils and magnets, wherein driving power distribution of the driving motors is variable, so that the acting points of the driving... | 07/14/1992 |
| 4992684 | Linear motor and driving apparatus using the same A linear motor device having a magnet, a first yoke for holding the magnet in a direction perpendicular to the magnetic flux in the clearance thereof, a second yoke disposed parallel to the first yoke so that there may be obtained a magnetic closed circui... | 02/12/1991 |
| 4967296 | Lightweight, rigid, compact configuration for the voice coil, carriage and printed circuit cable in a disc drive The carriage assembly of this invention includes an oval coil whose shape is maintained by a rectangular bobbin which is passed through the open sides of the rectangular carriage frame and fastened inside the carriage frame so that the ends of the coil pr... | 10/30/1990 |
| 4956735 | Actuator magnetic circuit A magnetic circuit structure for use in an actuator, where the actuator has a displaceable assembly and a coil attached to such assembly, is shown to include flux conductors having generally parallel first and second poles defining gaps therebetween and a... | 09/11/1990 |
| 4868432 | Multi-coil actuator with end cap flux carrier A linear actuator for reciprocating a read/write head mechanism relative to a magnetic disk storage system, including a second, supplemental solenoid coil and associated magnet pole in addition to the usual arrangement, by way of improving linearity and e... | 09/19/1989 |
| 4864447 | Linear actuator for a memory storage apparatus A linear actuator comprises a pair of central poles symmetrically arranged parallel to the direction of motion of a carriage for transducers. Four permanent magnets are disposed around each central pole leaving predetermined gaps. Four ambient poles and o... | 09/05/1989 |
| 4812934 | Actuator for memory storage device In a magnetic disc device, it is necessary that a magnetic head be positioned above an object data track at a high speed and with a high accuracy. This positioning operation is carried out by an actuator. In order to carry out a magnetic head-positioning ... | 03/14/1989 |
| 4760480 | Head access mechanism for magnetic disk memory device A head access mechanism of the magnetic disk memory device for memorizing information by means of a rigid or flexible magnetic disk. The head access mechanism is equipped with a moving-coil type linear motor comprising an E-shaped yokes with two magnetic ... | 07/26/1988 |
| 4613962 | Tracking device with linear motor A device for tracking a movable body along a linear path parallel to a plane includes a linear motor for driving the body along the linear path. The body is mounted, as by rollers, for movement along a guide, such as a pair of parallel guide rails, suppor... | 09/23/1986 |
| 4590529 | Carriage device for moving and positioning magnetic head A carriage device used for moving and positioning a magnetic head opposite prescribed tracks of a magnetic disk has the magnetic head mounted on a carriage which has linear motor mechanisms built integrally therein. The linear motor mechanisms incorporate... | 05/20/1986 |
| 4573094 | Moving magnet disc drive actuator A transducer actuator assembly (10) for a rotating disc memory apparatus has at least one pair of coils (40, 41) symmetrically spaced from a center plane of a linearly moving carriage (21) where the coils are stationary with respect to a fixed actuator ba... | 02/25/1986 |
| 4506307 | Magnetic head slider and actuator assembly A magnetic head slider and actuator assembly comprises an X-shaped shuttle actuator movable within a slotted portion of a frame within which permanent magnets are positioned. The shuttle actuator supports an electrical coil for interaction with the magnet... | 03/19/1985 |
| 4462054 | Disc drive electromagnetic actuator with enhanced flux density An electromagnetic actuator for a data disc drive having a carriage on which is mounted one or more read/write heads for cooperation with a data disc. The carriage is supported in the housing for movement on an axis that is oriented radially of the disc. ... | 07/24/1984 |
| 4450493 | Magnetic head slider and actuator assembly A magnetic head slider and actuator assembly has an air bearing magnetic head slider that is coupled to an electrical coil. Permanent magnets are positioned in a stationary frame to provide a magnetic field adjacent to the coil. When current is supplied t... | 05/22/1984 |
| 4423448 | Multi-path to data facility for disk drive transducer arms An improved disk file is disclosed including multiple independent transducer/actuator arrays disposed about a common disk (stack) and adapted to afford a plurality of alternate "Data-paths" whereby (virtually any) track on any disk may be accessed for dat... | 12/27/1983 |
| 4414594 | Linear actuator for a memory storage apparatus A dual motor linear actuator is disclosed for use in a magnetic disc drive device. It includes a carriage reciprocatably guided between a pair of guide rails, with the accessing transducers being mounted to its inner end. Separate rectangular drive coils ... | 11/08/1983 |
| 4393425 | Linear head actuator An actuator for linearly moving magnetic heads in which an open-ended carriage assembly extends down both sides of the magnet structure in order to provide a much shorter actuator assembly than is typical is described. The loading mechanism is not mounted... | 07/12/1983 |
