US4965686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc drive assembly for magnetic disc memory unit
Assignee: Kaman Aerospace Corp
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Filing: 1989-03-31
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Granted: 1990-10-23
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Expires: 2009-03-31
Abstract
Abstract A disc drive assembly for a magnetic disc memory unit is presented. The disc drive assembly has a stationary spindle to which a motor stator assembly is fastened by a wedge ring structure. The motor rotor assembly is constituted by a rotary hub mounted around the stator, the hub having a motor magnet mounted therein. A plurality of magnetic discs may be mounted on the exterior of the hub.
Inventors
- 👤 Paul R. Young
- 👤 David W. Richard
- 👤 Arthur J. Treff
- 👤 Christopher E. Staehly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:41
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/04; G11B25/043; G11B17/00; G11B17/02; G11B17/038; G11B19/00; G11B19/20; G11B19/2009; G11B23/00; G11B23/50; G11B23/505
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
A disc drive assembly including: base plate means; spindle shaft means fixed to said base plate means at a first end of said spindle shaft means; stator means positioned around said spindle shaft means; mounting means for mounting said stator means on said spindle shaft means, said mounting means including; a first wedge member fixed to said stator means; a second wedge member around said spindle shaft means and mating with said first wedge member, and loading means loading said second wedge member against said first wedge member; rotor means around said stator means; bearing means positioned between said spindle shaft means and said rotor means to rotatably support said rotor means for rotation about said means and spindle means; and a plurality of discs mounted in spaced apart relationship on said rotor means.
Claim 2
Dependent Claim
134 words
A disc drive assembly including: base plate means; spindle shaft means fixed to said base plate means at a first end of said spindle shaft means; stator means positioned around said spindle shaft means; mounting means for mounting said stator means on said spindle shaft means, said mounting means including; a first wedge member fixed to said stator means; a second wedge member around said spindle shaft means and mating with said first wedge member, and loading means loading said second wedge member against said first wedge member; rotor means around said stator means; bearing means positioned between said spindle shaft means and said rotor means to rotatably support said rotor means for rotation about said means and spindle means; and a plurality of discs mounted in spaced apart relationship on said rotor means.
Claim 3
Dependent Claim
65 words
A disc drive assembly as in claim 1 wherein: said first wedge member is a ring having a cylindrical part forming a slip fit about said spindle shaft means and a first inclined surface; second wedge member is a ring having a cylindrical part forming slip fit about said spindle shaft means and having a second inclined surface which bears against said first inclined surface.
Claim 4
Dependent Claim
39 words
A disc drive assembly as in claim 2 wherein: said loading means is a bar passing through said spindle shaft means and bearing against said second wedge member to load said second wedge member against said first wedge member.
Claim 5
Dependent Claim
28 words
A disc drive assembly as in claim 3 including: a retainer means on said spindle shaft means for positioned said first wedge member about said spindle shaft means.
Claim 6
Dependent Claim
43 words
A disc drive assembly as shown in claim 1 wherein said bearing means includes: a first bearing about one end of said spindle shaft means adjacent said base plate means; and a second bearing about the other end of said spindle shaft means.
Claim 7
Dependent Claim
38 words
A disc drive assembly as in claim 5 including: flange means at one end of said rotor means and connected to said first bearing; and cap means affixed to said rotor means and connected to said second bearing.
Claim 8
Dependent Claim
17 words
A disc drive assembly as in claim 6, including: means to impose a preload on said bearings.
Claim 9
Dependent Claim
33 words
A disc drive assembly as in claim 6 including: static discharge means supported by said cap and in contact with said spindle shaft means to eliminate uncontrolled static discharge from said rotor means.
Claim 10
Dependent Claim
28 words
A disc drive assembly as in claim 1 including: second plate means; and means connecting the second end of said spindle shaft means to said second plate means.
Claim 11
Dependent Claim
25 words
A disc drive assembly as in claim 1 including: retainer means connected to said rotor means imposing a load on the I.D. of said discs.
Claim 12
Dependent Claim
39 words
A disc drive assembly as in claim 1 including: static discharge means extending between said rotor means and said spindle shaft means and being in contact with said spindle shaft means to control static discharge from said rotor means.
References Cited (Backward Citations)
US4604665A
Cited
US4607182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |