Patent EP0387444A2 successfully refreshed from Google Patents.
EP0387444A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Subambient pressure air bearing
Assignee: Quantum Corp
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Filing: 1989-10-17
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Granted: —
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Expires: 2009-10-17
Abstract
Abstract A slider (100) having a pair of rails (124,126) with elongated surfaces which face the disk and are oriented generally along the direction of motion of the disk; a cavity, inset relative to the rail surfaces, is configured to produce subambient pressure tending to draw the slider (100) toward the disk; at least one of the rail surfaces is interrupted by at least one detail configured to reduce the variation in roll for different yaw angles. In another aspect, a slider (100) has at least one groove (150,152) cut in at least one rail; the groove is oriented at an angle such that its leading end is nearer the inner end of the rail and its trailing end is nearer the outer end of the rail. Other aspects and features are disclosed.
Inventors
- 👤 Yiao-Tee Hsia
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 13:20
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; G11B21/00; G11B21/16; G11B21/20; G11B21/21
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
103 words
A slider for carrying a transducer near to the surface of a storage disk at varying yaw angles, the slider being subject to roll according to yaw angle, comprising at least two rails, the rails having elongated surfaces for facing the disk and oriented generally along the intended direction of motion of the disk, the rails coupled to each other so as to define a cavity, the cavity configured to produce subambient pressure tending to draw the slider toward the disk, and at least one of the rail surfaces having at least one detail configured to counteract the roll associated with yaw angle.
Claim 2
Dependent Claim
103 words
A slider for carrying a transducer near to the surface of a storage disk at varying yaw angles, the slider being subject to roll according to yaw angle, comprising at least two rails, the rails having elongated surfaces for facing the disk and oriented generally along the intended direction of motion of the disk, the rails coupled to each other so as to define a cavity, the cavity configured to produce subambient pressure tending to draw the slider toward the disk, and at least one of the rail surfaces having at least one detail configured to counteract the roll associated with yaw angle.
Claim 3
Dependent Claim
14 words
The slider of claim 1 wherein the rails are coupled by a ramp section.
Claim 4
Dependent Claim
14 words
The slider of claim 1 wherein both of the rails have a respective detail.
Claim 5
Dependent Claim
14 words
The slider of claim 3 wherein the details respectively each comprise a uniform groove.
Claim 6
Dependent Claim
16 words
The slider of claim 1 wherein the detail extends across the width of a rail surface.
Claim 7
Dependent Claim
17 words
The slider of claim 3 wherein each respective detail extends across the width of a respective rail.
Claim 8
Dependent Claim
41 words
The slider of claim 1 wherein the detail extends across the width of a rail surface and defines a first and second section of the rail, the second section forming a polygon with an inner wall longer than its outer wall.
Claim 9
Dependent Claim
36 words
The slider of claim 6 wherein, respectively for each rail, each detail defines a first and second section of a rail, the second section forming a polygon with an inner wall longer than its outer wall.
Claim 10
Dependent Claim
15 words
The slider of claim 7 wherein the second section is larger than the first section.
Claim 11
Dependent Claim
15 words
The slider of claim 7 wherein the first section is larger than the second section.
Claim 12
Dependent Claim
14 words
The slider of claim 1 wherein the detail is a groove with parallel sides.
Claim 13
Dependent Claim
25 words
The slider of claim 1 wherein the trailing side of the detail is oriented at an acute angle to the longitudinal axis of the slider.
Claim 14
Dependent Claim
60 words
The slider of claim 1 wherein the slider further comprises a ramp section connected between the rails at one end of the rails and defining an upstream end of the slider, the rails' other ends terminating at a downstream end of the slider, the detail located nearer the upstream end of the slider than the downstream end of the slider.
Claim 15
Dependent Claim
15 words
The slider of claim 8 wherein the cavity has parallel sides in the first section.
Claim 16
Dependent Claim
30 words
The slider of claim 1 wherein the slider further comprises a ramp section connected between the rails, the rails coming closer together as they extend away from the ramp section.
Claim 17
Dependent Claim
11 words
The slider of claim 1 wherein the rails are flaired inward.
Claim 18
Dependent Claim
15 words
The slider of claim 1 wherein the rails are parallel and not tapered or flaired.
Claim 19
Dependent Claim
16 words
The slider of claim 1 wherein the rails are not parallel and not flaired, but tapered.
Claim 20
Dependent Claim
105 words
A subambient pressure slider for carrying a transducer near to the surface of a storage disk comprising a pair of coupled rails defining a pocket, the rails having elongated surfaces for facing the disk and oriented generally along the intended direction of motion of the disk, at least one groove cut in at least one rail nearer to the leading end of the rail than to the trailing end of the rail, and the groove being oriented at an angle such that its leading end is nearer the inner side of the rail and its trailing end is nearer the outer side of the rail.
Claim 21
Dependent Claim
105 words
A subambient pressure slider for carrying a transducer near to the surface of a storage disk comprising a pair of coupled rails defining a pocket, the rails having elongated surfaces for facing the disk and oriented generally along the intended direction of motion of the disk, at least one groove cut in at least one rail nearer to the leading end of the rail than to the trailing end of the rail, and the groove being oriented at an angle such that its leading end is nearer the inner side of the rail and its trailing end is nearer the outer side of the rail.
Claim 22
Dependent Claim
20 words
The slider of claim 1 or 19 wherein the rails have different configurations, one rail being longer than the other.
Claim 23
Dependent Claim
20 words
The slider of claim 1 or 19 wherein the rails have different configurations, one rail being wider than the other.
Claim 24
Dependent Claim
13 words
The slider of claim 1 or 19 wherein the detail is a chevron.
Claim 25
Dependent Claim
21 words
The slider of claim 1 or 19 wherein at least one rail has a foil section defining a flared oblique edge.
Claim 26
Independent Claim
135 words
A method for determining pressure relief features of a subambient pressure slider for carrying a transducer near to the surface of a storage disk, the slider including a pair of rails having elongated surfaces for facing the disk and oriented generally along the intended direction of motion of the disk, at least one pressure mitigating feature and foil on at least one of the rails, comprising the steps of iteratively solving the following slip-flow Reynolds equation: (where h = film thickness, p = pressure, U = linear velocity of disk, x = spatial coordinate in length, y = spatial coordinate in width, µ = viscosity of gas, and λ = molecular mean free path of gas), for flying height performance, including trailing edge height, roll angle and pitch, to obtain foil flare angle and length.
Claim 27
Independent Claim
135 words
A method for determining pressure relief features of a subambient pressure slider for carrying a transducer near to the surface of a storage disk, the slider including a pair of rails having elongated surfaces for facing the disk and oriented generally along the intended direction of motion of the disk, at least one pressure mitigating feature and foil on at least one of the rails, comprising the steps of iteratively solving the following slip-flow Reynolds equation: (where h = film thickness, p = pressure, U = linear velocity of disk, x = spatial coordinate in length, y = spatial coordinate in width, µ = viscosity of gas, and λ = molecular mean free path of gas), for flying height performance, including trailing edge height, roll angle and pitch, to obtain foil flare angle and length.
Claim 28
Dependent Claim
19 words
The method of claim 24 wherein the feature is a chevron and the foil is a flared oblique edge.
References Cited (Backward Citations)
No citation records indexed.
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