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公开(公告)号：DE68929034T2
公开(公告)日：2000-02-24
申请号：DE68929034
申请日：1989-10-27
Applicant: IBM
Inventor： GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD , LARSON THOMAS SCOTT
IPC: G11B21/21 , G11B5/60 , G11B15/62 , G11B17/32 , G11B23/50 , G11B25/04 , G11B33/12 , G11B33/14 , H02J13/00
Abstract: A rotating magnetic storage device is shown wherein the transducer and media are separated during operation by a thin film of low viscosity liquid lubricant that is recirculated from a reservoir within the head-media enclosure. Lubricant recirculation can be effected by capillary action using a wick, mechanical pumping and metering or distillation techniques. As compared to devices using air bearing separation, the transducer carrying slider has very small bearing surfaces which may be in the form of narrow rails or small depending foot elements. This enables fly heights of 2 microinches using a film of one micron thickness.
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公开(公告)号：ES2043825T3
公开(公告)日：1994-01-01
申请号：ES88306376
申请日：1988-07-13
Applicant: IBM
Inventor： GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD , KENNEDY BRUCE EDWARD , MURRAY BRUCE ALLEN , ROTHSCHILD WAYNE JAY
Abstract: In a magnetic disk file having a plurality of disks and a source of organic lubricant mounted within a housing, an air flow stream recirculates within the housing. The vapor pressure of the lubricant source is controlled to provide vapor phase transport of lubricant molecules between the source and the disks' recording surfaces. The lubricant molecules bidirectionally transfer between the air stream and the source, and between the air stream and the surface of the disks, as is needed to maintian a nomo-molecular lubricant film, in the range of about 3 to 15 angstroms, on the disks in accordance with the principle of Langmuir kinetics. The disks are rigid disks and their recording surface includes a carbon overcoat. This overcoat has an affinity for the airborne organic lubricant molecules. In a first embodiment, the vapor pressure of the lubricant is controlled by mounting the material at the coolest location within the housing. In a second embodiment, the lubricant is carried as a mono-molecular layer of lubricant on granular carbon particles which have a surface area that is many times greater than the surface area of the disks. In a third embodiment, the vapor pressure is controlled by combining the lubricant with a vapor pressure diluent.
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公开(公告)号：DE69313429D1
公开(公告)日：1997-10-02
申请号：DE69313429
申请日：1993-11-19
Applicant: IBM
Inventor： GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD , HAGAN JAMES ALOYSIUS
Abstract: The disk drive assembly has a disk assembly and a transducer carrying actuator which are surrounded by a housing and a lubricant film is maintained on the recording surfaces of the disk. A lubricant reservoir is positioned close to the disk recording surface, and a heater element is mounted in heat transfer relationship with the reservoir. A sensor determines the thickness of the lubricant film on the disk recording surface. A controller governs the power delivered to the heating element w.r.t. the lubricant film thickness determined by the sensor. A recirculating device captures lubricant that collects within the housing and returns it to the lubricant reservoir. The recirculator includes a wick structure that extends from a housing location where lubricant collects to the reservoir. The reservoir is planar and overlies the disk data surface with a separation not exceeding 500 microns.
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公开(公告)号：DE69115755D1
公开(公告)日：1996-02-08
申请号：DE69115755
申请日：1991-05-16
Applicant: IBM
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公开(公告)号：SG42880A1
公开(公告)日：1997-10-17
申请号：SG1996000403
申请日：1993-07-15
Applicant: IBM
Inventor： BECK JOHN LOWELL , GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD
IPC: F16C19/50 , F16C33/76 , F16C33/78 , G11B5/55 , G11B19/20 , G11B21/02 , G11B21/08 , G11B21/18 , G11B25/04 , G11B33/14
Abstract: A bearing seal assembly for an oscillating actuator, comprises an outer bearing raceway, an inner bearing raceway mounted concentric with the outer raceway, and an annular deformable liquid impermeable membrane having an axial length of not more than one tenth the radius thereof, an inner peripheral edge sealingly secured to the inner bearing raceway, and an outer peripheral edge sealingly secured to the outer raceway for enabling limited relative rotation between the inner raceway and the outer raceway with minimum axial distortion of said membrane. In one embodiment, the membrane is stretched to eliminate surface distortion under torsional stress. Another embodiment illustrates waves molded into the membrane for reducing torsional forces.
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Patent Agency Ranking
公开(公告)号：DE68920817D1
公开(公告)日：1995-03-09
申请号：DE68920817
申请日：1989-10-27
Applicant: IBM
Inventor： GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD , LARSON THOMAS SCOTT
IPC: G11B21/21 , G11B5/60 , G11B15/62 , G11B17/32 , G11B23/50 , G11B25/04 , G11B33/12 , G11B33/14 , H02J13/00
Abstract: A rotating magnetic storage device is shown wherein the transducer and media are separated during operation by a thin film of low viscosity liquid lubricant that is recirculated from a reservoir within the head-media enclosure. Lubricant recirculation can be effected by capillary action using a wick, mechanical pumping and metering or distillation techniques. As compared to devices using air bearing separation, the transducer carrying slider has very small bearing surfaces which may be in the form of narrow rails or small depending foot elements. This enables fly heights of 2 microinches using a film of one micron thickness.
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公开(公告)号：AU606980B2
公开(公告)日：1991-02-21
申请号：AU2033588
申请日：1988-08-02
Applicant: IBM
Inventor： GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD , KENNEDY BRUCE EDWARD , MURRAY BRUCE ALLEN , ROTHSCHILD WAYNE JAY
Abstract: In a magnetic disk file having a plurality of disks and a source of organic lubricant mounted within a housing, an air flow stream recirculates within the housing. The vapor pressure of the lubricant source is controlled to provide vapor phase transport of lubricant molecules between the source and the disks' recording surfaces. The lubricant molecules bidirectionally transfer between the air stream and the source, and between the air stream and the surface of the disks, as is needed to maintian a nomo-molecular lubricant film, in the range of about 3 to 15 angstroms, on the disks in accordance with the principle of Langmuir kinetics. The disks are rigid disks and their recording surface includes a carbon overcoat. This overcoat has an affinity for the airborne organic lubricant molecules. In a first embodiment, the vapor pressure of the lubricant is controlled by mounting the material at the coolest location within the housing. In a second embodiment, the lubricant is carried as a mono-molecular layer of lubricant on granular carbon particles which have a surface area that is many times greater than the surface area of the disks. In a third embodiment, the vapor pressure is controlled by combining the lubricant with a vapor pressure diluent.
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公开(公告)号：SG64851A1
公开(公告)日：1999-05-25
申请号：SG1996000073
申请日：1993-02-23
Applicant: IBM
Abstract: The back edge of a disk drive slider is used to remove debris from disk media by slowly sweeping it from the inner diameter of the disk to the outer diameter of the disk while the disk is rotating backwards from normal. The sweeping operation is completed while the disks are still gaining rotational speed so that liftoff velocity is not achieved. Material accumulated on the back edge of the slider is either dumped at the outer diameter of the disk, or remains on the back edge of the slider as normal operation is commenced.
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公开(公告)号：DE68920817T2
公开(公告)日：1995-08-10
申请号：DE68920817
申请日：1989-10-27
Applicant: IBM
Inventor： GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD , LARSON THOMAS SCOTT
IPC: G11B21/21 , G11B5/60 , G11B15/62 , G11B17/32 , G11B23/50 , G11B25/04 , G11B33/12 , G11B33/14 , H02J13/00
Abstract: A rotating magnetic storage device is shown wherein the transducer and media are separated during operation by a thin film of low viscosity liquid lubricant that is recirculated from a reservoir within the head-media enclosure. Lubricant recirculation can be effected by capillary action using a wick, mechanical pumping and metering or distillation techniques. As compared to devices using air bearing separation, the transducer carrying slider has very small bearing surfaces which may be in the form of narrow rails or small depending foot elements. This enables fly heights of 2 microinches using a film of one micron thickness.
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公开(公告)号：IE62260B1
公开(公告)日：1995-01-11
申请号：IE229888
申请日：1988-07-27
Applicant: IBM
Inventor： GREGORY THOMAS ALLEN , KELLER CHRISTOPHER GUILD , KENNEDY BRUCE EDWARD , MURRAY BRUCE ALLEN , ROTHSCHI WAYNE JAY
Abstract: In a magnetic disk file having a plurality of disks and a source of organic lubricant mounted within a housing, an air flow stream recirculates within the housing. The vapor pressure of the lubricant source is controlled to provide vapor phase transport of lubricant molecules between the source and the disks' recording surfaces. The lubricant molecules bidirectionally transfer between the air stream and the source, and between the air stream and the surface of the disks, as is needed to maintian a nomo-molecular lubricant film, in the range of about 3 to 15 angstroms, on the disks in accordance with the principle of Langmuir kinetics. The disks are rigid disks and their recording surface includes a carbon overcoat. This overcoat has an affinity for the airborne organic lubricant molecules. In a first embodiment, the vapor pressure of the lubricant is controlled by mounting the material at the coolest location within the housing. In a second embodiment, the lubricant is carried as a mono-molecular layer of lubricant on granular carbon particles which have a surface area that is many times greater than the surface area of the disks. In a third embodiment, the vapor pressure is controlled by combining the lubricant with a vapor pressure diluent.
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