Patent US4682254A successfully refreshed from Google Patents.
US4682254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gimbal spring supported magnetic recording head
Assignee: Citizen Watch Co Ltd
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Filing: 1985-03-06
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Granted: 1987-07-21
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Expires: 2005-03-06
Abstract
Abstract A magnetic recording head includes a read/write core and an erase core sandwiched and fixedly connected between a main slider and an auxiliary slider, a coil assembly having back bars closely attached to the respective cores which a read/write coil and an erase coil are wound around and fixed thereon, and a gimbal spring on which the main slider is fixed. The read/write coil and the erase coil are laterally arranged along in parallel with the gimbal spring, and the sliders, the cores and the coil assembly are respectively arranged on the one side of the gimbal spring.
Inventors
- 👤 Shingo Hashimoto
- 👤 Kazuyuki Sunaga
- 👤 Kaoru Kasugai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B5/2651; G11B5/10; G11B5/48; G11B5/4806; G11B5/4826
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
A magnetic recording head for a floppy disk drive which is supported by a gimbal spring comprising: a read/write core and an erase core sandwiched between and fixedly connected to a main slider and auxiliary slider; and a coil assembly having back bars closely attached to said respective read/write and erase cores on which a read/write coil and an erase coil are directly wound around and fixed thereon, said read/write coil and said erase coil being provided with an axis of said read/write coil and said erase coil in parallel wtih said gimbal spring with said read/write and erase cores and said coil assembly together with said sliders being provided only on one side of the gimbal spring.
Claim 2
Dependent Claim
118 words
A magnetic recording head for a floppy disk drive which is supported by a gimbal spring comprising: a read/write core and an erase core sandwiched between and fixedly connected to a main slider and auxiliary slider; and a coil assembly having back bars closely attached to said respective read/write and erase cores on which a read/write coil and an erase coil are directly wound around and fixed thereon, said read/write coil and said erase coil being provided with an axis of said read/write coil and said erase coil in parallel wtih said gimbal spring with said read/write and erase cores and said coil assembly together with said sliders being provided only on one side of the gimbal spring.
Claim 3
Dependent Claim
36 words
A magnetic recording head according to claim 1 wherein the auxiliary slider is projectingly attached to the main slider superjacent the cores so as to provide an eave-like protector for preventing the disconnection of the coils.
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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) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |