Patent US4837648A successfully refreshed from Google Patents.
US4837648A
Expired / Lapsed
US
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Floating magnetic head
Assignee: Mitsubishi Electric Corp
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Filing: 1988-04-13
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Granted: 1989-06-06
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Expires: 2008-04-13
Abstract
Abstract A floating magnetic head has two or more slider portions with floating surfaces formed thereon generally in parallel with a plane on which a magnetic disk rotates. The magnetic head body has grooves formed between the adjacent slider portions in a facing relation with a recording surface of the magnetic disk. Water removing members are formed in at least a portion of the grooves and the floating surfaces of the slider portions for removing water formed on the magnetic disk surface by electrolyzing the water. The water removing member comprises a cathode electrode, a proton-conductive solid laminated on the cathode electrode, an anode electrode laminated on the proton-conductive solid and facing the surface of the magnetic disk. Water films formed in the gaps between the surface of the magnetic disk and the floating surfaces of the slider portions are removed by electrolysis effected by the water removing members.
Inventors
- 👤 Shiro Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:11
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; G11B33/00; G11B33/14; G11B33/1446; G11B33/1453
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
A floating magnetic head comprising: a magnetic head body; a slider means provided on said magnetic head body and having a floating surface disposed generally in parallel with a plane on which a magnetic disk rotates, said floating surface capable of moving toward and away from a surface of said magnetic disk; and a water removing member formed in at least a portion of said floating surface of said slider means for electrolytically removing any existing water between the floating surface of said slider means and the surface of said magnetic disk.
Claim 2
Dependent Claim
92 words
A floating magnetic head comprising: a magnetic head body; a slider means provided on said magnetic head body and having a floating surface disposed generally in parallel with a plane on which a magnetic disk rotates, said floating surface capable of moving toward and away from a surface of said magnetic disk; and a water removing member formed in at least a portion of said floating surface of said slider means for electrolytically removing any existing water between the floating surface of said slider means and the surface of said magnetic disk.
Claim 3
Dependent Claim
58 words
A floating magnetic head according to claim 1, wherein said slider means comprises at least two slider portions disposed in parallel with each other with at least one groove formed between adjacent ones of said slider portions; and said water removing member is provided in at least a portion of each of said at least two slider portions.
Claim 4
Dependent Claim
59 words
A floating magnetic head according to claim 1, wherein said water removing member comprises a cathode electrode, a proton-conductive solid laminated on said cathode electrode, an anode electrode laminated on said proton-conductive solid and facing the surface of said magnetic disk, and a power source connected between said cathode electrode and said anode electrode for supplying dc power thereto.
Claim 5
Dependent Claim
28 words
A floating magnetic head according to claim 3, wherein at least one of said cathode electrode and said anode electrode is formed of a proton-electron mixed conductive solid.
Claim 6
Dependent Claim
31 words
A floating magnetic head according to claim 4, wherein said proton-electron mixed conductive solid is formed from a metal or a metallic compound from which a metal hydride can be formed.
Claim 7
Dependent Claim
26 words
A floating magnetic head according to claim 5, wherein said metal or metallic compound is selected from a group of Pa, NaNi 5 , and TiNi.
Claim 8
Dependent Claim
20 words
A floating magnetic head according to claim 4, wherein said proton-electron mixed conductive solid is formed from a metal oxide.
Claim 9
Dependent Claim
34 words
A floating magnetic heat according to claim 7, wherein said metal oxide is selected from a group of WO 3 , ReO 3 , MoO 3 , MnO 2 , and NiOOH.2H 2 O.
Claim 10
Dependent Claim
19 words
A floating magnetic head according to claim 3, wherein said proton-conductive solid is formed from a β-alumina substitution product.
Claim 11
Dependent Claim
18 words
A floating magnetic head according to claim 3, wherein said proton-conductive solid is formed from a solid polyelectrolyte.
Claim 12
Dependent Claim
17 words
A floating magnetic head according to claim 10, wherein said solid polyelectrolyte includes a potassium dihydrogen phosphate.
Claim 13
Dependent Claim
24 words
A floating magnetic head according to claim 2, further comprising another water removing member disposed in said groove formed in said adjacent slider portions.
Claim 14
Dependent Claim
45 words
A floating magnetic head according to claim 1, wherein a cavity is formed inside said magnetic head body over a surface of said water removing member oppposite to the surface of said magnetic disk, said cavity communicating with the outside air via a vent hole.
Claim 15
Dependent Claim
56 words
A floating magnetic head according to claim 1, wherein the whole of said magnetic head body is formed as a water removing member which has an anode electrode formed over the entire area of at least one floating surface, a proton-conductivity solid laminated on said anode electrode, and a cathode electrode laminated on said proton-conductive solid.
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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |