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31.发明专利
公开(公告)号：PL178343B1
公开(公告)日：2000-04-28
申请号：PL31969395
申请日：1995-10-05
Applicant: IBM
Inventor： BERG LOWELL J , BOIGENZAHN JEFFREY F , BOUTAGHOU ZINE-EDDINE , FRACEK TODD P
Abstract: A direct access storage device (DASD) includes a plurality of motion limiters and/or a continuous motion limiter projecting from at least one of the base and cover, each motion limiter having faces disposed in close proximity to and confronting opposite surfaces of a data storage disk adjacent a peripheral portion of the disk that does not contain data. Preferably, the motion limiters are disposed at several points about the periphery of the disk, and may be incorporated in a load/unload ramp and/or side rails of the DASD. The faces of the motion limiters are disposed relative to the disk so that when the DASD is subjected to an acceleration, the disk contacts at least one of the faces only at the peripheral portion of the disk, outside the data zone. Accordingly, the motion limiters prevent data zone and spindle bearing damage when the DASD is dropped.
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公开(公告)号：DE69504095D1
公开(公告)日：1998-09-17
申请号：DE69504095
申请日：1995-10-05
Applicant: IBM
Inventor： BERG LOWELL , BOIGENZAHN JEFFREY , BOUTAGHOU ZINE-EDDINE , FRACEK TODD
Abstract: A direct access storage device (DASD) includes a plurality of motion limiters and/or a continuous motion limiter projecting from at least one of the base and cover, each motion limiter having faces disposed in close proximity to and confronting opposite surfaces of a data storage disk adjacent a peripheral portion of the disk that does not contain data. Preferably, the motion limiters are disposed at several points about the periphery of the disk, and may be incorporated in a load/unload ramp and/or side rails of the DASD. The faces of the motion limiters are disposed relative to the disk so that when the DASD is subjected to an acceleration, the disk contacts at least one of the faces only at the peripheral portion of the disk, outside the data zone. Accordingly, the motion limiters prevent data zone and spindle bearing damage when the DASD is dropped.
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33.发明专利
公开(公告)号：HUT76958A
公开(公告)日：1998-01-28
申请号：HU9700401
申请日：1995-10-05
Applicant: IBM
Abstract: A direct access storage device (DASD) includes a plurality of motion limiters and/or a continuous motion limiter projecting from at least one of the base and cover, each motion limiter having faces disposed in close proximity to and confronting opposite surfaces of a data storage disk adjacent a peripheral portion of the disk that does not contain data. Preferably, the motion limiters are disposed at several points about the periphery of the disk, and may be incorporated in a load/unload ramp and/or side rails of the DASD. The faces of the motion limiters are disposed relative to the disk so that when the DASD is subjected to an acceleration, the disk contacts at least one of the faces only at the peripheral portion of the disk, outside the data zone. Accordingly, the motion limiters prevent data zone and spindle bearing damage when the DASD is dropped.
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Patent Agency Ranking
公开(公告)号：SG42871A1
公开(公告)日：1997-10-17
申请号：SG1996000330
申请日：1994-12-06
Applicant: IBM
Inventor： BERG LOWELL JAMES , BOUTAGHOU ZINE-EDDINE , LARSON THOMAS SCOTT , MEYER DALLAS W , MOSBRUCKER JAY MICHAEL , NEUBAUER JERRY LEE , OTTESEN HAL HJALMAR
Abstract: A load/unload device to remove the slider from the proximity of the magnetic recording surface of a disk in a disk drive whenever the disk is to be stopped is disclosed. The load/unload device is a ramp-like wedge which extends generally radially from the center of the magnetic disk and to the magnetic recording surface of the magnetic disk. When the slider is moved toward the center of the disk by an actuator mechanism, the end of the load arm supporting the slider, referred to as a tang, will engage the inclined plane of the wedge and lift the slider from the surface of the magnetic disk as the slider is translated closer to the center of the disk. Once the slider has been removed from close proximity of the disk, the tang may engage a trough-like surface on the structure supporting the wedge and will effectively detent the position of the slider through the forces exerted on the tang by the load beam of the actuator. Thus the disk will be protected from undesirable and damaging impacts of the slider against the magnetic recording surface of the disk thereby prolonging disk utility.
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35.发明专利
公开(公告)号：PL319693A1
公开(公告)日：1997-08-18
申请号：PL31969395
申请日：1995-10-05
Applicant: IBM
Abstract: A direct access storage device (DASD) includes a plurality of motion limiters and/or a continuous motion limiter projecting from at least one of the base and cover, each motion limiter having faces disposed in close proximity to and confronting opposite surfaces of a data storage disk adjacent a peripheral portion of the disk that does not contain data. Preferably, the motion limiters are disposed at several points about the periphery of the disk, and may be incorporated in a load/unload ramp and/or side rails of the DASD. The faces of the motion limiters are disposed relative to the disk so that when the DASD is subjected to an acceleration, the disk contacts at least one of the faces only at the peripheral portion of the disk, outside the data zone. Accordingly, the motion limiters prevent data zone and spindle bearing damage when the DASD is dropped.
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公开(公告)号：PL319484A1
公开(公告)日：1997-08-04
申请号：PL31948495
申请日：1995-10-05
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
IPC: G11B17/02 , G11B17/028 , G11B17/038 , G11B19/20 , G11B25/04
Abstract: A disk drive contains an integrally-formed one-piece hub, clamp and rotor housing, which is preferably injection-molded plastic. In the preferred embodiment, the hub includes a hollow cylindrical portion for surrounding a set of bearings mounted on a central shaft, and a flange portion extending from the middle of the cylinder and supporting a single disk. Compliant clamping fingers on the upper surface of the flange engage the disk through its central hole. The fingers are inclined slightly outward, and include a pawl at the end of each finger. During assembly, the disk is forced over the pawls of the fingers until they engage the disk. The fingers, being slightly elastic, will deform to permit the disk to slide over the pawls, and then return to lock the disk in place. The fingers automatically center the disk about the hub axis, without the need for centering tools. The hub also serves as a housing for the rotor of a spindle motor which rotates the disk. A back iron ring and permanent magnets are attached to the underside of the flange at its outer edge to form the rotor. An electromagnetic stator assembly surrounds the disk axis in the annular space defined by the flange, the permanent magnets and back iron at the outer edge, and the cylindrical portion of the hub at the inner edge.
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公开(公告)号：PL318096A1
公开(公告)日：1997-05-12
申请号：PL31809696
申请日：1996-05-03
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
Abstract: A bearing design for a rotatable assembly includes two freely rotating balls mounted on the axis of rotation of the assembly and axially separated, one near each axial end of the assembly. Each ball is confined by a moving concave bearing surface of the rotatable assembly and a corresponding fixed concave bearing surface of a mounting attached to a frame, housing, or similar non-rotating structure. One of the fixed mountings is preferably attached to a compressible spring to provide a controlled axial pre-load to the assembly. The balls are substantially enclosed and lubricant provided in the enclosed cavity. In the preferred embodiment, the rotatable assembly is a rotary actuator assembly of a disk drive. Compared to conventional ball bearing designs, the present design reduces the number of parts and volume of space occupied by the bearings, reduces hysteresis, and improves shock resistance.
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公开(公告)号：CA2197917A1
公开(公告)日：1996-04-25
申请号：CA2197917
申请日：1995-10-05
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
IPC: G11B17/02 , G11B17/028 , G11B17/038 , G11B19/20 , G11B25/04
Abstract: A disk drive contains an integrally-formed one-piece hub, clamp and rotor housing, which is preferably injection-molded plastic. In the preferred embodiment, the hub includes a hollow cylindrical portion (201) for surrounding a set of bearings mounted on a central shaft, and a flange portion (202) extending from the middle of the cylinder and supporting a single disk (101). Compliant clamping fingers (203) on the upper surface of the flange engage the disk through its central hole. The fingers are inclined slightly outward, and include a pawl at the end of each finger. During assembly, the disk is forced over the pawls of the fingers until they engage the disk. The fingers, being slightly elastic, will deform to permit the disk to slide over the pawls, and then return to lock the disk in place. The fingers automatically center the disk about the hub axis, without the need for centering tools. The ub also serves as a housing for the rotor of a spindle motor which rotates the disk. A back iron ring and permanent magnets are attached to the underside of the flange at its outer edge to form the rotor. An electromagnetic stator assembly surrounds the disk axis in the annular space defined by the flange, the permanent magnets and back iron at the outer edge, and the cylindrical portion of the hub at the inner edge.
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