Patent US4475135A successfully refreshed from Google Patents.
US4475135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head air bearing slider
Assignee: HGST Netherlands BV
•
Filing: 1983-12-07
•
Granted: 1984-10-02
•
Expires: 2003-12-07
Abstract
Abstract A self-loading magnetic head air bearing slider is formed with a taper across the full width at its leading edge. The air bearing slider has two rails along its sides and a recess between the rails. The structure of the rails is preferably flared to provide an improved pressure profile thereby to allow fast liftoff from a disk surface.
Inventors
- 👤 Michael W. Warner
- 👤 Michael F. Garnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:47
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/16; G11B21/20; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
A self-loading air bearing slider for supporting a transducer comprising: a slider structure having leading and trailing edges; a tapered section formed across the full width of said slider structure at said leading edge; side rails disposed along the sides of an air bearing surface of said slider structure, said rails extending from said tapered portion to said trailing edge; and a cross rail connecting said side rails, said side rails having parallel sections connected to said cross rails and extending toward the trailing edge to a break point, each of said side rails being wider at said trailing edge of said slider structure than at said break point, said cross rail being formed adjacent to said tapered section so that said cross rail and said side rails have coplanar surfaces and define a recessed section trailing said cross rail, said recessed section being open at said trailing edge.
Claim 2
Dependent Claim
149 words
A self-loading air bearing slider for supporting a transducer comprising: a slider structure having leading and trailing edges; a tapered section formed across the full width of said slider structure at said leading edge; side rails disposed along the sides of an air bearing surface of said slider structure, said rails extending from said tapered portion to said trailing edge; and a cross rail connecting said side rails, said side rails having parallel sections connected to said cross rails and extending toward the trailing edge to a break point, each of said side rails being wider at said trailing edge of said slider structure than at said break point, said cross rail being formed adjacent to said tapered section so that said cross rail and said side rails have coplanar surfaces and define a recessed section trailing said cross rail, said recessed section being open at said trailing edge.
Claim 3
Dependent Claim
117 words
A self-loading air bearing slider for supporting a transducer, comprising: two spaced side rails joined at their respective ends to an integrally formed cross rail, said cross rail being uniformly beveled across its full width at what constitutes the leading edge of the slider, all said rails being of constant uninterrupted height throughout except where beveled, said side rails and cross rail defining a generally U-shaped structure providing a slot extending inwardly from what constitutes the trailing edge of the slider, said slot terminating at said cross rail, and the sides of said slot diverging at equal angles and for equal distances along one portion of their length and parallel throughout the remaining portion of their length.
Claim 4
Dependent Claim
117 words
A self-loading air bearing slider for supporting a transducer, comprising: two spaced side rails joined at their respective ends to an integrally formed cross rail, said cross rail being uniformly beveled across its full width at what constitutes the leading edge of the slider, all said rails being of constant uninterrupted height throughout except where beveled, said side rails and cross rail defining a generally U-shaped structure providing a slot extending inwardly from what constitutes the trailing edge of the slider, said slot terminating at said cross rail, and the sides of said slot diverging at equal angles and for equal distances along one portion of their length and parallel throughout the remaining portion of their length.
Claim 5
Dependent Claim
24 words
A self-loading air bearing slider as in claim 2 wherein said one portion starts at said trailing edge and terminates at a break point.
Claim 6
Dependent Claim
28 words
A self-loading air bearing slider as in claim 2 wherein said one portion starts intermediate said trailing edge and said break point and terminates at said break point.
Claim 7
Dependent Claim
22 words
A self-loading air bearing slider as in claim 2 wherein said cross rail is beveled for only a part of its height.
Claim 8
Dependent Claim
17 words
A self-loading air bearing slider as in claim 2 wherein said slot has a tapered sloping geometry.
Claim 9
Dependent Claim
18 words
A self-loading air bearing slider as in claim 2 wherein said slot serves as a negative pressure region.
Claim 10
Dependent Claim
31 words
A self-loading air bearing slider as in claim 7, including a magnetic transducer mounted at said trailing edge of said slider structure and at an air bearing surface of said structure.
Claim 11
Dependent Claim
53 words
A self-loading air bearing slider as in claim 8 wherein said side rails, said cross rails and said slot produce a combined pressure profile when said air bearing slider is positioned adjacent a moving magnetic medium so that said magnetic transducer is maintained at a substantially constant spacing from said moving magnetic medium.
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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |