公开(公告)号：CA2031595C

公开(公告)日：1995-08-29

申请号：CA2031595

申请日：1990-12-05

Applicant: IBM

Inventor： DEW GRAHAM NIGEL ,  HEARN ANTHONY ROGER ,  SEBBORN DAVID JOHN ,  YOUNG JULIAN THOMAS

IPC: G11B17/038 ,  G11B17/00 ,  G11B19/20 ,  G11B23/03 ,  G11B25/04 ,  G11B33/14

Abstract: A disk file includes an expansion ring attached to the wall of the hub and which is located between the lowermost disk of the disk stack and the hub flange. A circular ridge concentric with the hub is formed on the ring and engages the underside of the disk. The ring is adapted so that the thermal expansion of the ring is substantially equal to that of the aluminum disk at the position of contact between the two. A washer interposed between ring and flange allows the ring to move freely relative to the flange. During thermal cycling, the ring and disk move at the same rate at the point of contact, the ring ensuring that the disks remain concentric with the hub throughout the range of disk file operating temperatures.

公开(公告)号：HK202796A

公开(公告)日：1996-11-15

申请号：HK202796

申请日：1996-11-07

Applicant: IBM

Inventor： DEW GRAHAM NIGEL ,  HEARN ANTHONY ROGER ,  SEBBORN DAVID JOHN ,  YOUNG JULIAN THOMAS

IPC: G11B17/038 ,  G11B17/00 ,  G11B19/20 ,  G11B23/03 ,  G11B25/04 ,  G11B33/14

Abstract: PCT No. PCT/GB90/00020 Sec. 371 Date Oct. 1, 1992 Sec. 102(e) Date Oct. 1, 1992 PCT Filed Jan. 8, 1990 PCT Pub. No. WO91/11004 PCT Pub. Date Jul. 25, 1991.A disk file includes an expansion ring attached to the wall of the hub and which is located between the lowermost disk of the disk stack and the hub flange. A circular ridge concentric with the hub is formed on the ring and engages the underside of the disk. The ring is adapted so that the thermal expansion of the ring is substantially equal to that of the aluminum disk at the position of contact between the two. A washer interposed between ring and flange allows the ring to move freely relative to the flange. During thermal cycling, the ring and disk move at the same rate at the point of contact, the ring ensuring that the disks remain concentric with the hub throughout the range of disk file operating temperatures.

公开(公告)号：AU615376B2

公开(公告)日：1991-09-26

申请号：AU5050990

申请日：1990-02-26

Applicant: IBM

Inventor： HATCHETT MICHAEL ROBERT ,  HEARN ANTHONY ROGER ,  HEATH JOHN STEWART ,  LACEY CHARLES MICHAEL ,  LAREK THADDEUS LOUIS ,  REIDENBACH JOHN RALPH ,  SCHWIETERS CLARENCE RAYMOND

IPC: G11B21/02 ,  F16C29/04 ,  G11B5/55 ,  G11B21/08 ,  G11B33/00 ,  H02K5/173 ,  H02K41/035 ,  G11B5/596

Abstract: A linear actuator for positioning the heads of a disk file relative to tracks on the disks employs a ceramic material having wear properties superior to steel in guide surfaces for guiding a head supporting carriage running on rotary bearings in contact with the guide surfaces. The preferred ceramic material is tetragonally stabilized zirconia.

公开(公告)号：GB2241370A

公开(公告)日：1991-08-28

申请号：GB9003470

申请日：1990-02-15

Applicant: IBM

Inventor： HEARN ANTHONY ROGER ,  DEW GRAHAM NIGEL ,  HATCHETT MICHAEL ROBERT ,  HALL MICHAEL WILLIAM ,  TAYLOR MICHAEL GEORGE

IPC: G11B33/08 ,  G11B33/12

Abstract: A disk file comprises a head disk enclosure 1 connected to a support frame by a plurality of isolation mounts. Each isolation mount comprises a constrained layer flexure 23 which is rigidly attached at both ends to a bracket 25 of the support frame. Located in an aperture in the constrained layer flexure is a resilient grommet 24. This grommet supports a bolt 27 which passes through the grommet and into the head-disk enclosure casting.

公开(公告)号：DE69106403D1

公开(公告)日：1995-02-16

申请号：DE69106403

申请日：1991-02-04

Applicant: IBM

Inventor： HEARN ANTHONY ROGER ,  DEW GRAHAM NIGEL ,  HATCHETT MICHAEL ROBERT ,  HALL MICHAEL WILLIAM ,  TAYLOR MICHAEL GEORGE

IPC: G11B33/08 ,  G11B33/12

Abstract: A disk file comprises a head disk enclosure 1 connected to a support frame by a plurality of isolation mounts. Each isolation mount comprises a constrained layer flexure 23 which is rigidly attached at both ends to a bracket 25 of the support frame. Located in an aperture in the constrained layer flexure is a resilient grommet 24. This grommet supports a bolt 27 which passes through the grommet and into the head-disk enclosure casting.

公开(公告)号：DE69106403T2

公开(公告)日：1995-07-13

申请号：DE69106403

申请日：1991-02-04

Applicant: IBM

Inventor： HEARN ANTHONY ROGER ,  DEW GRAHAM NIGEL ,  HATCHETT MICHAEL ROBERT ,  HALL MICHAEL WILLIAM ,  TAYLOR MICHAEL GEORGE

IPC: G11B33/08 ,  G11B33/12

Abstract: A disk file comprises a head disk enclosure 1 connected to a support frame by a plurality of isolation mounts. Each isolation mount comprises a constrained layer flexure 23 which is rigidly attached at both ends to a bracket 25 of the support frame. Located in an aperture in the constrained layer flexure is a resilient grommet 24. This grommet supports a bolt 27 which passes through the grommet and into the head-disk enclosure casting.

公开(公告)号：HK15295A

公开(公告)日：1995-02-10

申请号：HK15295

申请日：1995-02-06

Applicant: IBM

Inventor： HATCHETT MICHAEL ROBERT ,  HEARN ANTHONY ROGER ,  HEATH JOHN STEWART ,  LACEY CHARLES MICHAEL ,  LAREK THADDEUS LOUIS ,  REIDENBACH JOHN RALPH ,  SCWIETERS CLARENCE RAYMOND

IPC: G11B21/02 ,  F16C29/04 ,  G11B5/55 ,  G11B21/08 ,  G11B33/00 ,  H02K5/173 ,  H02K41/035 ,  G11B5/596

Abstract: A linear actuator for positioning the heads of a disk file relative to tracks on the disks employs a ceramic material having wear properties superior to steel in guide surfaces for guiding a head supporting carriage running on rotary bearings in contact with the guide surfaces. The preferred ceramic material is tetragonally stabilized zirconia.

公开(公告)号：DE69013188D1

公开(公告)日：1994-11-17

申请号：DE69013188

申请日：1990-03-08

Applicant: IBM

Inventor： HATCHETT MICHAEL ROBERT ,  HEARN ANTHONY ROGER ,  HEATH JOHN STEWART ,  LACEY CHARLES MICHAEL ,  LAREK THADDEUS LOUIS ,  REIDENBACH JOHN RALPH ,  SCWIETERS CLARENCE RAYMOND

IPC: G11B21/02 ,  F16C29/04 ,  G11B5/55 ,  G11B21/08 ,  G11B33/00 ,  H02K5/173 ,  H02K41/035 ,  G11B5/596

Abstract: A linear actuator for positioning the heads of a disk file relative to tracks on the disks employs a ceramic material having wear properties superior to steel in guide surfaces for guiding a head supporting carriage running on rotary bearings in contact with the guide surfaces. The preferred ceramic material is tetragonally stabilized zirconia.

公开(公告)号：AU6786090A

公开(公告)日：1991-07-11

申请号：AU6786090

申请日：1990-12-07

Applicant: IBM

Inventor： DEW GRAHAM NIGEL ,  HEARN ANTHONY ROGER ,  SEBBORN DAVID JOHN ,  YOUNG JULIAN THOMAS

IPC: G11B17/038 ,  G11B17/00 ,  G11B19/20 ,  G11B23/03 ,  G11B25/04 ,  G11B33/14

Abstract: PCT No. PCT/GB90/00020 Sec. 371 Date Oct. 1, 1992 Sec. 102(e) Date Oct. 1, 1992 PCT Filed Jan. 8, 1990 PCT Pub. No. WO91/11004 PCT Pub. Date Jul. 25, 1991.A disk file includes an expansion ring attached to the wall of the hub and which is located between the lowermost disk of the disk stack and the hub flange. A circular ridge concentric with the hub is formed on the ring and engages the underside of the disk. The ring is adapted so that the thermal expansion of the ring is substantially equal to that of the aluminum disk at the position of contact between the two. A washer interposed between ring and flange allows the ring to move freely relative to the flange. During thermal cycling, the ring and disk move at the same rate at the point of contact, the ring ensuring that the disks remain concentric with the hub throughout the range of disk file operating temperatures.

公开(公告)号：DE3067011D1

公开(公告)日：1984-04-19

申请号：DE3067011

申请日：1980-10-07

Applicant: IBM

Inventor： DICKIE HUGH GRAHAM ,  HEARN ANTHONY ROGER ,  HEATH JOHN STEWART

IPC: G11B21/02 ,  H02K3/47 ,  H02K33/18