Patent US731320A successfully refreshed from Google Patents.
Patent US5134531A successfully refreshed from Google Patents.
US5134531A
Expired / Lapsed
US
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Magnetic head having a slider with a particular surface arrangement
Assignee: TDK Corp
•
Filing: 1990-06-07
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Granted: 1992-07-28
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Expires: 2010-06-07
Abstract
Abstract A magnetic head includes a slider provided with at least one reading/writing element wherein the slider has a pair of rail portions projecting with a space therebetween from the surface opposing a magnetic recording medium so as to extend in the direction of air discharge. The slider surface between the pair of rail portions includes first and second grooves formed inside and along rail portions and a flat portion formed between the first and second grooves, wherein the depth α from the surface of one of the rail portions to the flat portion and the depth β from the flat portion to the bottom of the first or second groove satisfy a relation of α>β.
Inventors
- 👤 Mikio Matsuzaki
- 👤 Shunichi Katase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:34
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3103; G11B5/187; G11B5/1871; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
129 words
A magnetic head having a slider provided with at least one reading/writing element wherein said slider comprises; a pair of rail portions projecting with a space therebetween from a slider surface opposing a magnetic recording medium so as to extend in a direction of air discharge, the slider surface between said pair of rail portions including first and second grooves formed inside and along said rail portions and a flat portion formed between said first and second grooves, wherein a depth α from a surface of one of the rail portions to said flat portion and a depth β from said flat portion to a bottom portion of said first or second groove satisfy a relation of α>>β such that α is at least ten times greater than β.
Claim 2
Dependent Claim
129 words
A magnetic head having a slider provided with at least one reading/writing element wherein said slider comprises; a pair of rail portions projecting with a space therebetween from a slider surface opposing a magnetic recording medium so as to extend in a direction of air discharge, the slider surface between said pair of rail portions including first and second grooves formed inside and along said rail portions and a flat portion formed between said first and second grooves, wherein a depth α from a surface of one of the rail portions to said flat portion and a depth β from said flat portion to a bottom portion of said first or second groove satisfy a relation of α>>β such that α is at least ten times greater than β.
Claim 3
Dependent Claim
16 words
The magnetic head according to claim 1, wherein the depth α is 30 μm or more.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |