US4553184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head slider
Assignee: Toshiba Corp
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Filing: 1982-07-19
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Granted: 1985-11-12
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Expires: 2002-07-19
Abstract
Abstract A magnetic head slider having a high-pressure producing bottom surface which defines a path for passing compressed air streams produced by the rotation of a magnetic disc which flow between the magnetic head and the magnetic disc. The high pressure producing bottom surface is provided with pressure-reducing inclined grooves which separate a portion of the compressed air streams and guide them diagonally downstream to the outside.
Inventors
- 👤 Kiichiro Ogishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
A magnetic head slider for a rearwardly mounted magnetic head comprising: a bottom surface which faces the surface of a magnetic disc, said bottom surface having a central area which is recessed and high pressure-applying areas surrounding said central area which are not recessed, thereby provided for an enclosed depression; and pressure reducing grooves formed in opposed said high pressure-applying areas and extending diagonally from said central area and through said high pressure-applying areas, said grooves being inclined monotonically to the rear of said head slider; whereby compressed air streams caused by a rotation of a magnetic disc flow between said magnetic disc and said head slider bottom surface and along said high pressure-applying areas, said grooves acting to partially deflect said compressed air stream away from said slide by said pressure reducing grooves.
Claim 2
Dependent Claim
134 words
A magnetic head slider for a rearwardly mounted magnetic head comprising: a bottom surface which faces the surface of a magnetic disc, said bottom surface having a central area which is recessed and high pressure-applying areas surrounding said central area which are not recessed, thereby provided for an enclosed depression; and pressure reducing grooves formed in opposed said high pressure-applying areas and extending diagonally from said central area and through said high pressure-applying areas, said grooves being inclined monotonically to the rear of said head slider; whereby compressed air streams caused by a rotation of a magnetic disc flow between said magnetic disc and said head slider bottom surface and along said high pressure-applying areas, said grooves acting to partially deflect said compressed air stream away from said slide by said pressure reducing grooves.
Claim 3
Dependent Claim
15 words
The magnetic head slider according to claim 1, wherein the pressure-reducing inclined grooves extend linearly.
Claim 4
Dependent Claim
22 words
The magnetic head slider according to claim 1, wherein the pressure-reducing inclined grooves are curved convexly toward the outside of the slider.
Claim 5
Dependent Claim
44 words
The magnetic head slider according to claim 1, wherein the slider is further provided with an inclined plane which is used to receive external air streams and further removed from the operation plane of the magnetic disc toward the upstream side of the slider.
Claim 6
Dependent Claim
49 words
The magnetic head slider according to claim 1, wherein the slider is constructed by further providing the high pressure-applying path with a plurality of pressure-increasing inclined grooves which extend to the upstream side of the slider in a state progressively separated nearer to the upstream end of the slider.
Claim 7
Dependent Claim
15 words
The magnetic head slider according to claim 5, wherein the pressure-increasing inclined grooves extend linearly.
Claim 8
Dependent Claim
22 words
The magnetic head slider according to claim 5, wherein the pressure-increasing inclined grooves are curved convexly toward the outside of the slider.
Claim 9
Dependent Claim
34 words
A magnetic head slider according to claim 1, wherein said bottom surface is substantially rectangular, said central area is substantially rectangular and said high pressure-applying areas form a rectangular frame around said central area.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |