Patent US4907106A successfully refreshed from Google Patents.
US4907106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head slider driving mechanism for a magnetic disk apparatus
Assignee: NEC Corp
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Filing: 1988-01-19
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Granted: 1990-03-06
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Expires: 2008-01-19
Abstract
Abstract A head driving system for a magnetic disk includes a controller which drives the head slider radially during times before takeoff and after landing of the head slider. A decrease in sliding abrasion per unit area of the takeoff and landing zone due to the radial movement of the slider results in less net abrasion damage and prolongs the life of the disk apparatus.
Inventors
- 👤 Tadaharu Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:51
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
232 words
A head slider driving mechanism for a magnetic disk apparatus, comprising: a magnetic disk including contact-start-stop and data areas separated from each other in a radial direction of said magnetic disk; motor means for rotating said magnetic disk; a head slider opposed to a surface of said magnetic disk and flying over said surface due to air pressure produced during rotation of said magnetic disk; a position actuator mechanism for positioning said head slider in a radial direction of said magnetic disk; and control means for controlling said position actuator mechanism so as to position said head slider within said contact-start-stop area when said motor means stops the rotation of said magnetic disk, said control means controlling said position actuator mechanism to start to effect the driving of said head slider in a radial direction of said magnetic disk within said contact-start-stop area during a first sliding period in which said head slider slides upon and lifts off from the surface of said magnetic disk at substantially the same time said motor means starts rotating said magnetic disk, and said control means controlling said position actuator mechanism to drive said head slider in a radial direction within said contact-start-stop area during a second sliding period in which said head slider lands on and slides upon the surface of said magnetic disk immediately before said motor means stops rotation of said magnetic disk.
Claim 2
Dependent Claim
232 words
A head slider driving mechanism for a magnetic disk apparatus, comprising: a magnetic disk including contact-start-stop and data areas separated from each other in a radial direction of said magnetic disk; motor means for rotating said magnetic disk; a head slider opposed to a surface of said magnetic disk and flying over said surface due to air pressure produced during rotation of said magnetic disk; a position actuator mechanism for positioning said head slider in a radial direction of said magnetic disk; and control means for controlling said position actuator mechanism so as to position said head slider within said contact-start-stop area when said motor means stops the rotation of said magnetic disk, said control means controlling said position actuator mechanism to start to effect the driving of said head slider in a radial direction of said magnetic disk within said contact-start-stop area during a first sliding period in which said head slider slides upon and lifts off from the surface of said magnetic disk at substantially the same time said motor means starts rotating said magnetic disk, and said control means controlling said position actuator mechanism to drive said head slider in a radial direction within said contact-start-stop area during a second sliding period in which said head slider lands on and slides upon the surface of said magnetic disk immediately before said motor means stops rotation of said magnetic disk.
Claim 3
Dependent Claim
56 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 1, wherein said control means drives said head slider in an inner radial direction of said magnetic disk during said first sliding period and drives said head slider in an outer radial direction of said magnetic disk during said second sliding period.
Claim 4
Dependent Claim
61 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 1, wherein said head slider comprises side rails extending perpendicularly to a radial direction of said disk and wherein said control means drives said head slider in a radial direction by an amount larger than a width of one of said side rails during said first period.
Claim 5
Dependent Claim
43 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 1, wherein said control means controls said position actuator mechanism to drive said head slider in a radial direction during a predetermined time interval within said first sliding period.
Claim 6
Dependent Claim
33 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 1, wherein said head slider is driven by means of said position actuator mechanism during said first sliding period.
Claim 7
Dependent Claim
42 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 1, wherein said head slider is radially driven by said position actuator mechanism for approximately two seconds during said first sliding period and during said second sliding period.
Claim 8
Dependent Claim
29 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 1, wherein said contact-start-stop area is located at an inner periphery of said magnetic disk.
Claim 9
Dependent Claim
223 words
A head slider driving mechanism for a magnetic disk apparatus, comprising: a magnetic disk including contact-start-stop and data areas separated from each other in a radial direction of said magnetic disk; motor means for rotating said magnetic disk; a head slider opposed to a surface of said magnetic disk and flying over said surface due to air pressure produced during rotation of said magnetic disk, said head slider comprising side rails extending perpendicularly to said radial direction, and said contact-start-stop area having a radial width which is greater than a width of said head slider by an amount corresponding to at least one width of one of said side rails; a position actuator mechanism for positioning said head slider in a radial direction of said magnetic disk; and control means for controlling said position actuator mechanism so as to position said head slider within said contact-start-stop area when said motor means stops the rotation of said magnetic disk, said control means controlling said position actuator mechanism to start to effect the driving of said head slider in a radial direction of said magnetic disk within said contact-start-stop area during a first sliding period in which said head slider slides upon and lifts off from the surface of said magnetic disk at substantially the same time said motor means starts rotating said magnetic disk.
Claim 10
Dependent Claim
223 words
A head slider driving mechanism for a magnetic disk apparatus, comprising: a magnetic disk including contact-start-stop and data areas separated from each other in a radial direction of said magnetic disk; motor means for rotating said magnetic disk; a head slider opposed to a surface of said magnetic disk and flying over said surface due to air pressure produced during rotation of said magnetic disk, said head slider comprising side rails extending perpendicularly to said radial direction, and said contact-start-stop area having a radial width which is greater than a width of said head slider by an amount corresponding to at least one width of one of said side rails; a position actuator mechanism for positioning said head slider in a radial direction of said magnetic disk; and control means for controlling said position actuator mechanism so as to position said head slider within said contact-start-stop area when said motor means stops the rotation of said magnetic disk, said control means controlling said position actuator mechanism to start to effect the driving of said head slider in a radial direction of said magnetic disk within said contact-start-stop area during a first sliding period in which said head slider slides upon and lifts off from the surface of said magnetic disk at substantially the same time said motor means starts rotating said magnetic disk.
Claim 11
Dependent Claim
69 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 8, wherein said control means controls said position actuator mechanism to drive said head slider in a radial direction within said contact-start-stop area during a second sliding period in which said head slider lands on and slides upon the surface of said magnetic disk immediately before said motor means stops rotation of said magnetic disk.
Claim 12
Dependent Claim
49 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 8, wherein said control means controls said position actuator mechanism to drive said head slider in a radial direction by an amount larger than the width of one of said rails during said first period.
Claim 13
Dependent Claim
43 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 8, wherein said control means controls said position actuator mechanism to drive said head slider in a radial direction during a predetermined time interval within said first sliding period.
Claim 14
Dependent Claim
97 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 8, wherein said control means controls said position actuator mechanism to drive said head slider in a radial direction within said contact-start-stop area during a second sliding period in which said head slider lands on and slides upon the surface of said magnetic disk immediately before said motor means stops rotation of said magnetic disk, and wherein said head slider is radially driven by said position actuator mechanism for approximately two seconds during said first sliding period and during said second sliding period.
Claim 15
Dependent Claim
33 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 8, wherein said head slider is driven by means of said position actuator mechanism during said first sliding period.
Claim 16
Dependent Claim
29 words
The head slider driving mechanism for a magnetic disk apparatus as claimed in claim 8, wherein said contact-start-stop area is located at an inner periphery of said magnetic disk.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |