US4420780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-loading magnetic head air bearing slider
Assignee: International Business Machines Corp
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Filing: 1981-08-17
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Granted: 1983-12-13
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Expires: 2001-08-17
Abstract
Abstract The air bearing surface of a self-loading magnetic head slider has two side rails and a recessed section therebetween. The air bearing surface has a cylindrical or parabolic crowned shape to effectuate very small spacing between the trailing end of the slider, which supports magnetic transducer means in flying relation to a moving magnetic medium.
Inventors
- 👤 Kenneth L. Deckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:18
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
177 words
A self-loading magnetic head slider assembly comprising: a support structure having leading and trailing ends and a front section extending across the support structure from the leading end thereof; side rails disposed longitudinally from the front section to the trailing end along the side edges of a surface of said support structure; a recessed section formed between said side rails behind said front section; at least one magnetic transducer deposited at the trailing end of one of said side rails; characterized in that said side rails and said front section have a continuously curved convex shape in longitudinal section between said leading and said trailing end; and said continuously curved convex shape of said front section and said side rails and said recessed section produce a combined pressure profile when said slider assembly is positioned adjacent a moving magnetic medium so that said slider assembly assumes an orientation with respect to said moving magnetic medium in which the minimum spacing between said slider assembly and said magnetic medium occurs at the trailing end of said slider assembly.
Claim 2
Dependent Claim
177 words
A self-loading magnetic head slider assembly comprising: a support structure having leading and trailing ends and a front section extending across the support structure from the leading end thereof; side rails disposed longitudinally from the front section to the trailing end along the side edges of a surface of said support structure; a recessed section formed between said side rails behind said front section; at least one magnetic transducer deposited at the trailing end of one of said side rails; characterized in that said side rails and said front section have a continuously curved convex shape in longitudinal section between said leading and said trailing end; and said continuously curved convex shape of said front section and said side rails and said recessed section produce a combined pressure profile when said slider assembly is positioned adjacent a moving magnetic medium so that said slider assembly assumes an orientation with respect to said moving magnetic medium in which the minimum spacing between said slider assembly and said magnetic medium occurs at the trailing end of said slider assembly.
Claim 3
Dependent Claim
19 words
A self-loading magnetic head slider assembly as in claim 1 in which said continuously curved convex shape is cylindrical.
Claim 4
Dependent Claim
19 words
A self-loading magnetic head slider assembly as in claim 1 in which said continuously curved convex shape is parabolic.
Claim 5
Dependent Claim
29 words
A magnetic head slider assembly as in claim 1 wherein said continuously curved convex surface is an air bearing surface that cooperates with a magnetic medium in transducing relation.
Claim 6
Dependent Claim
17 words
A magnetic head slider assembly as in claim 1, wherein said recessed section is an etched area.
Claim 7
Dependent Claim
19 words
A magnetic head slider assembly as in claim 1, wherein said recessed section is open at said trailing end.
Claim 8
Dependent Claim
29 words
A magnetic head slider assembly as in claim 1, wherein said shaped rails have a crown height in the range of 0.75-1.25 microns between said leading and trailing ends.
Claim 9
Dependent Claim
20 words
A magnetic head slider assembly as in claim 1, wherein the depth of said recessed section is about 10 microns.
References Cited (Backward Citations)
US3170045A
Cited
US4261024A
Cited
US4214287A
Cited
JPS55105857A
Cited
US4218715A
Cited
US4285019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |