Patent US4807070A successfully refreshed from Google Patents.
US4807070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting structure for dual magnetic head
Assignee: Konica Minolta Inc
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Filing: 1987-07-09
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Granted: 1989-02-21
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Expires: 2007-07-09
Abstract
Abstract The present invention relates to a mechanism for carrying a pair of magnetic core heads for reading and writing magnetic codes on a flexible disk having magnetic coatings thereon while the disk is rotating. Each of the heads is disposed on either side of the disk. The head carrying mechanism allows one of the heads 1 to rock about a radial axis with respect to the disk, i.e. pitching and to rock about a circumferential axis with respect to the disk, i.e. rolling as well as to move in the direction normal to the disk face. Further, the head carrying mechanism allows the head 0 to pitch about a radial axis with respect to the disk face but not to roll about an axis parallel to the circumferential direction with respect to the disk.
Inventors
- 👤 Shin Isozaki
- 👤 Michio Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B17/00; G11B17/32; G11B21/00; G11B21/16; G11B21/20; G11B5/488; G11B5/4886
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
A supporting structure for a dual magnetic head for use with a disk drive system for a double sided flexible disk comprising: a. a first magnetic core head and a second magnetic core head, said first head being disposed on a first side of said flexible disk and said second head being disposed on a second side of said flexible disk; b. a first leaf spring gimbal for supporting said first magnetic core head, said first leaf spring gimbal allowing said first magnetic core head to pitch and to roll as well as to move normally to a data storage surface on said flexible disk; c. a second leaf spring gimbal for supporting said second magnetic core head, said second leaf spring gimbal allowing said second magnetic core head to pitch and to move normally to a data storage surface on said flexible disk; and d. a cantilever leaf spring connected to said second leaf spring gimbal, said cantilever leaf spring for preventing rolling of said second magnetic core head.
Claim 2
Dependent Claim
170 words
A supporting structure for a dual magnetic head for use with a disk drive system for a double sided flexible disk comprising: a. a first magnetic core head and a second magnetic core head, said first head being disposed on a first side of said flexible disk and said second head being disposed on a second side of said flexible disk; b. a first leaf spring gimbal for supporting said first magnetic core head, said first leaf spring gimbal allowing said first magnetic core head to pitch and to roll as well as to move normally to a data storage surface on said flexible disk; c. a second leaf spring gimbal for supporting said second magnetic core head, said second leaf spring gimbal allowing said second magnetic core head to pitch and to move normally to a data storage surface on said flexible disk; and d. a cantilever leaf spring connected to said second leaf spring gimbal, said cantilever leaf spring for preventing rolling of said second magnetic core head.
Claim 3
Dependent Claim
53 words
A supporting structure as set forth in claim 1, in which a fixed end of said cantilever is fixed at points spaced in radial direction with respect to said data storage surface, and a free end thereof is joined to a central portion of said second leaf spring gimbal at two non-slidable points.
Claim 4
Dependent Claim
78 words
A supporting structure as set forth in claim 1, in which one end of said cantilever leaf spring is fixed and the other end is connected to a central portion of said second leaf spring gimbal by means of a spacer, a bottom end of said spacer is joined in at one non-slidable joint with said cantilever leaf spring and an upper end of said spacer is joined at two non-slidable points to said second leaf spring gimbal.
Claim 5
Dependent Claim
52 words
A supporting structure as set forth in claims 2 or 3, in which said non-slidable points comprise a plurality of slots provided on said second leaf spring gimbal and aligned in a radial line with respect to said data storage surface, and a plurality of tapered projections are inserted into said slots.
Claim 6
Dependent Claim
37 words
A supporting structure as set forth in claim 3, in which said second leaf spring gimbal, said cantilever leaf spring and said spacer between them are assembled into a unit to be mounted on a carriage arm.
Claim 7
Dependent Claim
229 words
A supporting structure for a dual magnetic head for use with a disk drive system for a double sided flexible disk comprising: a. a first magnetic core head and a second magnetic core head, said first magnetic core head disposed on a first side of said flexible disk and said second magnetic head disposed on a second side of said flexible disk; b. a first leaf spring gimbal for supporting said first magnetic core head, said first leaf spring gimbal allowing said first magnetic core head to pitch and to roll as well as to move normally to a data storage surface on said flexible disk; c. a second leaf spring gimbal for supporting said second magnetic core head, said second leaf spring gimbal allowing said second magnetic core head to pitch and to move normally to a data storage surface on said flexible disk; d. a back-up leaf spring gimbal for supporting said second magnetic core head and said second leaf spring gimbal for preventing rolling of said second magnetic core head; and e. a spacer for connecting said back-up leaf spring gimbal to said second leaf spring gimbal, a bottom end of said spacer is joined in at one non-slidable joint with said back-up leaf spring gimbal and an upper end of said spacer is joined in at two non-slidable points to said second leaf spring gimbal.
Claim 8
Dependent Claim
229 words
A supporting structure for a dual magnetic head for use with a disk drive system for a double sided flexible disk comprising: a. a first magnetic core head and a second magnetic core head, said first magnetic core head disposed on a first side of said flexible disk and said second magnetic head disposed on a second side of said flexible disk; b. a first leaf spring gimbal for supporting said first magnetic core head, said first leaf spring gimbal allowing said first magnetic core head to pitch and to roll as well as to move normally to a data storage surface on said flexible disk; c. a second leaf spring gimbal for supporting said second magnetic core head, said second leaf spring gimbal allowing said second magnetic core head to pitch and to move normally to a data storage surface on said flexible disk; d. a back-up leaf spring gimbal for supporting said second magnetic core head and said second leaf spring gimbal for preventing rolling of said second magnetic core head; and e. a spacer for connecting said back-up leaf spring gimbal to said second leaf spring gimbal, a bottom end of said spacer is joined in at one non-slidable joint with said back-up leaf spring gimbal and an upper end of said spacer is joined in at two non-slidable points to said second leaf spring gimbal.
Claim 9
Dependent Claim
50 words
A supporting structure as set forth in claim 6, in which said non-slidable points comprise a plurality of slots provided on said second leaf spring gimbal and aligned in a radial line with respect to said data storage surface, and a plurality of tapered projections are inserted into said slots.
Claim 10
Dependent Claim
38 words
A supporting structure as set forth in claim 6, in which said second leaf spring gimbal, said back-up leaf spring gimbal and said spacer between them are assembled into a unit to be mounted on a carriage arm.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |