Patent US4556969A successfully refreshed from Google Patents.
US4556969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed disk file
Assignee: International Business Machines Corp
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Filing: 1984-12-28
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Granted: 1985-12-03
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Expires: 2004-12-28
Abstract
Abstract An improved hermetically sealed disk file is disclosed in which the axis of rotation of the disk spindle and the longitudinal axis of a surrounding cylindrical housing are positioned transverse to one another so that cross-sectional diameter of the housing need be only slightly larger than that of the disks mounted on the spindle.
Inventors
- 👤 Robert C. Treseder
- 👤 Thomas G. Savarese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:12
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/14; G11B33/1446; G11B23/00; G11B23/02; G11B23/03; G11B23/032; G11B23/0323
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
An improved hermetically sealed disk file, comprising: at least one mounting plate; a spindle having a first axis, said spindle being rotatably mounted on said mounting plate; at least one disk mounted on said spindle for rotation about said first axis, said disk having a first outer diameter; an elongated, cylindrical housing enclosing said mounting plate, spindle and disk, said housing having a second axis transverse to said first axis; and means for attaching said mounting plate to said housing.
Claim 2
Dependent Claim
80 words
An improved hermetically sealed disk file, comprising: at least one mounting plate; a spindle having a first axis, said spindle being rotatably mounted on said mounting plate; at least one disk mounted on said spindle for rotation about said first axis, said disk having a first outer diameter; an elongated, cylindrical housing enclosing said mounting plate, spindle and disk, said housing having a second axis transverse to said first axis; and means for attaching said mounting plate to said housing.
Claim 3
Dependent Claim
34 words
An improved disk file according to claim 1, wherein said housing has an essentially circular cross-section transverse to said second axis, said cross-section having a second diameter only slightly larger than said first diameter.
Claim 4
Dependent Claim
55 words
An improved disk file according to claim 1, wherein there are two of said mounting plates and said spindle is rotatably mounted therebetween; and said means for attaching comprises a pair of end plates extending between said support plates at opposite ends of said housing and means for attaching said housing to said end plates.
Claim 5
Dependent Claim
38 words
An improved disk file according to claim 3, wherein said spindle extends beyond one of said mounting plates, further comprising a motor mounted on the opposite side of said one mounting plate and operatively connected to said spindle.
Claim 6
Dependent Claim
27 words
An improved disk file according to claim 1, wherein said housing comprises circumferentially extending corrugations to accommodate differential pressure between the interior and exterior of said housing.
Claim 7
Dependent Claim
18 words
An improved disk file according to claim 1, wherein said second axis is perpendicular to said first axis.
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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |