Patent US4739429A successfully refreshed from Google Patents.
US4739429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head and support therefore
Assignee: Hitachi Ltd
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Filing: 1985-08-26
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Granted: 1988-04-19
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Expires: 2005-08-26
Abstract
Abstract A magnetic head has a slider and a recording and reproducing gap which slide-contact a magnetic disk and is pivotally supported. The recording and reproducing gap of the magnetic head is disposed so as to be offset toward the forward end of the slider in terms of the direction of rotation of the magnetic disk, whereby it is possible to obtain a stable state of contact between the recording and reproducing gap and the magnetic disk.
Inventors
- 👤 Gen Seki
- 👤 Seiichi Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:32
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4826; G11B5/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
282 words
A magnetic head supporting apparatus comprising; a carriage movable in a direction of a radius of a magnetic disk, a head arm mounted on said carriage, a first magnetic head mounted on said carriage through a first supporting member, a second magnetic head opposing said first magnetic head across said magnetic disk, and mounted on said head arm through a second supporting member, a head arm spring mounted on said head arm for pressing said first and second magnetic heads to bring them into contact with said magnetic disk with a predetermined pressure, wherein a first slider of said first magnetic head is supported pivotally about a support point of said first supporting member which allows said first slider to pivot about said point on an axis extending radially of said disk, a second slider of said second magnetic head is supported pivotally about a support point of said second supporting member which allows said second slider to pivot about said point on an axis extending radially of said disk, a recording and reproducing head gap of said first magnetic head is disposed on said slider at the forward end of said slider as viewed in a direction of rotation of said magnetic disk, and a recording and reproducing head gap of said second magnetic head is disposed on said slider at the forward end of said slider as viewed in a direction of rotation of said magnetic disk, said first and second sliders making contact with respective disk surfaces to thereby cause said sliders to generate a turning moment about their respective pivot axes whereby a more uniform and stable contact is generated between the respective head gaps and disk surfaces.
Claim 2
Dependent Claim
282 words
A magnetic head supporting apparatus comprising; a carriage movable in a direction of a radius of a magnetic disk, a head arm mounted on said carriage, a first magnetic head mounted on said carriage through a first supporting member, a second magnetic head opposing said first magnetic head across said magnetic disk, and mounted on said head arm through a second supporting member, a head arm spring mounted on said head arm for pressing said first and second magnetic heads to bring them into contact with said magnetic disk with a predetermined pressure, wherein a first slider of said first magnetic head is supported pivotally about a support point of said first supporting member which allows said first slider to pivot about said point on an axis extending radially of said disk, a second slider of said second magnetic head is supported pivotally about a support point of said second supporting member which allows said second slider to pivot about said point on an axis extending radially of said disk, a recording and reproducing head gap of said first magnetic head is disposed on said slider at the forward end of said slider as viewed in a direction of rotation of said magnetic disk, and a recording and reproducing head gap of said second magnetic head is disposed on said slider at the forward end of said slider as viewed in a direction of rotation of said magnetic disk, said first and second sliders making contact with respective disk surfaces to thereby cause said sliders to generate a turning moment about their respective pivot axes whereby a more uniform and stable contact is generated between the respective head gaps and disk surfaces.
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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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |