Patent US4285019A successfully refreshed from Google Patents.
US4285019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contoured magnetic recording head/slider assembly
Assignee: Memorex Corp
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Filing: 1980-03-10
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Granted: 1981-08-18
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Expires: 2000-03-10
Abstract
Abstract A magnetic head/slider assembly for flying a magnetic head on a fluid bearing relative to magnetic recording media moving in a predetermined direction, as a fluid bearing surface which is convexly curved longitudinally of the assembly. A magnetic recording head extends rearwardly of the slider body with at least a portion of its bottom surface also being convexly curved. The head/slider assembly is supported such that the portion of the assembly closest to the magnetic recording media when the media is stopped is a portion of the slider body forward of the trailing edge thereof, whereby the magnetic head gap remains spaced above the media when the media contacting portion of the assembly is resting thereupon.
Inventors
- 👤 John C. Scott
- 👤 Raymond Herrera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
201 words
A magnetic head/slider assembly for flying a magnetic head on a fluid bearing relative to magnetic recording media moving in a predetermined direction in the fluid, comprising a slider body having leading and trailing edges with respect to such relative movement and a bottom surface facing said media and extending longitudinally of said slider body with at least a portion of said bottom surface forming a fluid bearing surface which is convexly curved in the longitudinal direction from said trailing edge to a point forward thereof, and at least one magnetic head including a read/write gap affixed to said slider body and extending rearwardly of the trailing edge thereof, the bottom surface of said head being convexly curved in said longitudinal direction from said slider body trailing edge to a point rearward thereof, said head/slider assembly being supported such that the portion of said assembly closest to said media when the movement of said media is stopped is a portion of said slider body forward of said trailing edge, whereby the magnetic head remains spaced above the media when the media-contacting portion of the assembly is resting on the media surface to protect the read/write gap from contact with the media.
Claim 2
Dependent Claim
201 words
A magnetic head/slider assembly for flying a magnetic head on a fluid bearing relative to magnetic recording media moving in a predetermined direction in the fluid, comprising a slider body having leading and trailing edges with respect to such relative movement and a bottom surface facing said media and extending longitudinally of said slider body with at least a portion of said bottom surface forming a fluid bearing surface which is convexly curved in the longitudinal direction from said trailing edge to a point forward thereof, and at least one magnetic head including a read/write gap affixed to said slider body and extending rearwardly of the trailing edge thereof, the bottom surface of said head being convexly curved in said longitudinal direction from said slider body trailing edge to a point rearward thereof, said head/slider assembly being supported such that the portion of said assembly closest to said media when the movement of said media is stopped is a portion of said slider body forward of said trailing edge, whereby the magnetic head remains spaced above the media when the media-contacting portion of the assembly is resting on the media surface to protect the read/write gap from contact with the media.
Claim 3
Dependent Claim
35 words
The assembly of claim 1 wherein the curvature of said slider body bottom surface is generally cylindrical about an axis transverse to said slider body and generally parallel to the plane of said recording media.
Claim 4
Dependent Claim
25 words
The assembly of claim 1 wherein the curvature of said slider body bottom surface is generally spherical about a point spaced above said slider body.
Claim 5
Dependent Claim
32 words
The assembly of any of claims 1, 2, or 3 wherein said slider body curved surface and said magnetic head curved surface comprise portions of a surface having a continuous convex curvature.
Claim 6
Dependent Claim
100 words
The assembly of claim 1 wherein said slider body is mounted to a flexure for pivotal movement about an axis transverse to said slider body and generally parallel to the surface of said media, said pivot axis being positioned behind the center of lift of said fluid bearing on said slider body fluid bearing surface such that the lifting force of said fluid bearing against said slider body fluid bearing surface will pivot said head/slider assembly, when flying, to bring said gap to a position in which said gap is the portion of said assembly closest to the moving media.
Claim 7
Dependent Claim
51 words
The assembly of any of claims 1, 2 or 3 wherein at least a portion of said slider body bottom surface, intermediate said leading and trailing edges thereof, is substantially flat with at least part of said convexly curved portion extending between said flat portion and said slider body trailing edge.
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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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |