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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
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.
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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
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.
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公开(公告)号：ES2090122T3
公开(公告)日：1996-10-16
申请号：ES90901621
申请日：1990-01-08
Applicant: IBM
Inventor： DEW GRAHAM NIGEL , HEARN ANTHONY ROGER , SEBBORN DAVID JOHN , YOUNG JULIAN THOMAS
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.
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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
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.
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