Patent EP0129336A1 successfully refreshed from Google Patents.
EP0129336A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transducer-slider assembly having contoured air-bearing surface
Assignee: 3M Co
•
Filing: 1984-05-17
•
Granted: —
•
Expires: 2004-05-17
Abstract
Abstract @ Slider (10) for flying a transducer (26) closely above a rotating recording medium is similar to those of the prior art except thatthe surfaces of its air-bearing rails (12,13,14) are contoured to be rounded toward the outer and trailing edges of the rails (12, 13, 14), and preferably also toward the leading-edge taper (18, 19, 20) of each rail (12, 13, 14). The novel slider (10) flies a transducer (26) over a drumhead-like recording medium at close, remarkably uniform distances.
Inventors
- 👤 James K. c/o Minnesota Mining and Knudsen
- 👤 Don C. c/o Minnesota Mining and Mann
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:10
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: 14
Claim 1
Independent Claim
78 words
A slider (10) for flying a transducer (26) over a drumhead-like recording medium comprising at least two spaced-apart rails (12-14), of which each outer rail (12,14) has a broad air-bearing surface including a leading-edge taper (18,20) and a relatively-flat, broad, central portion (22,24), and characterized in that said central portion has a generally-oval perimeter (22A,24A) beyond which the air-bearing surface has compound curvatures of decreasing radii toward the outer (32A) and trailing edges (33A) of the rail (12A,14A).
Claim 2
Dependent Claim
78 words
A slider (10) for flying a transducer (26) over a drumhead-like recording medium comprising at least two spaced-apart rails (12-14), of which each outer rail (12,14) has a broad air-bearing surface including a leading-edge taper (18,20) and a relatively-flat, broad, central portion (22,24), and characterized in that said central portion has a generally-oval perimeter (22A,24A) beyond which the air-bearing surface has compound curvatures of decreasing radii toward the outer (32A) and trailing edges (33A) of the rail (12A,14A).
Claim 3
Dependent Claim
24 words
A slider (10) as defined in claim 1 further characterized in that the central portion of each of the outer rails (12A,14A) is flat.
Claim 4
Dependent Claim
39 words
A slider (10) as defined in claim 1 further characterized in that the central portion of each of the outer rails (12A,14A) is generally spherical or cylindrical, with a radius of at least 0.2 meter in the transverse direction.
Claim 5
Dependent Claim
56 words
A slider (10) as defined in claim 1 further characterized in that the air-bearing surface of each of the outer rails (12A, 14A) beyond the central portion also has compound curvatures of decreasing radii (30B) toward the inner edge (31B) of the rail (14B) so that the perimeter (24B) of the central portion is completely oval.
Claim 6
Dependent Claim
40 words
A slider (10) as defined in claim 1 further characterized in that the inward portion of said perimeter (22A,24A) substantially coincides with the inward edge of the rail (12A,14A) so that the perimeter (35A) is essentially half of an oval.
Claim 7
Dependent Claim
49 words
A slider (10) as defined in claim 5 further characterized by a relatively narrow center rail (13A) which is spaced apart from each of said outer rails (12A,14A) and has an air-bearing surface which is aligned both longitudinally and transversely with the surfaces of said two outer rails (12A,14A).
Claim 8
Dependent Claim
39 words
A slider (10) as defined in claim 1 further characterized in that the air-bearing surface beyond the generally-oval perimeter (35A) of each of the outer rails (12A,14A) has compound curvatures of decreasing radii (30A) toward the leading-edge taper (20A).
Claim 9
Dependent Claim
32 words
A slider (10) as defined in claim 7 further characterized in that the radii (30A) continue to decrease to the front margin (34A) of the leading-edge taper (20A) of each rail (12A,14A).
Claim 10
Dependent Claim
24 words
A transducer-slider assembly (10C) as defined in claim 6 further characterized by a transducer (26A) near the trailing edge of the center rail (13A).
Claim 11
Dependent Claim
20 words
A transducer-slider assembly (10C) as defined in claim 9 further characterized in that the transducer (26A) is a magnetic head.
Claim 12
Dependent Claim
19 words
A slider (10) as defined in claim 1 further characterized in that said two outer rails (12A,14A) are adjacent.
Claim 13
Dependent Claim
27 words
A transducer-slider assembly (10C) as defined in claim 11 further characterized by a transducer (26C) near the trailing edge (37C) of one of said two rails (12C,14C).
Claim 14
Dependent Claim
20 words
A transducer-slider assembly (10C) as defined. in claim 12 further characterized in that the transducer (26C) is a magnetic head.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.