US3587073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamp for attaching magnetic disks to a hub
Assignee: International Business Machines Corp
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Filing: 1969-08-21
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Granted: 1971-06-22
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Expires: 1989-08-21
Abstract
Abstract A magnetic storage disc assembly comprises a cylindrical hub, to which a multiplicity of discs and interleaved spacer rings are mounted coaxially. The hub is connected to a rotary drive spindle, whereby the discs may be rotated relative to magnetic heads. The discs and spacer rings are mechanically fastened to the hub, and a flexible ring clamps the discs and spacers together with a uniform pressure.
Inventors
- 👤 Sanjoy Ghose
- 👤 Armin Kluth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/038
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
An assembly of discs comprising: a hub for supporting a stack of discs in parallelism; a multiplicity of spacers disposed between said discs; means for securing said discs and spacers to said hub; and a clamping ring having a rigid portion for seating against the outermost discs of the assembly and a flexible portion disposed orthogonally to said rigid portion for fastening to said hub, said ring controlling the clamping force and absorbing the torque applied by said securing means when securing said discs and spacers to said hub.
Claim 2
Dependent Claim
89 words
An assembly of discs comprising: a hub for supporting a stack of discs in parallelism; a multiplicity of spacers disposed between said discs; means for securing said discs and spacers to said hub; and a clamping ring having a rigid portion for seating against the outermost discs of the assembly and a flexible portion disposed orthogonally to said rigid portion for fastening to said hub, said ring controlling the clamping force and absorbing the torque applied by said securing means when securing said discs and spacers to said hub.
Claim 3
Dependent Claim
70 words
An assembly of discs comprising: a cylindrical hub for supporting a stack of discs in parallelism and having a collar portion centrally located on its outer wall; a multiplicity of spacers disposed between said discs; means for securing said discs and spacers to said hub; and clamping means disposed between said securing means and said hub for controlling the clamping force resulting from the torque applied by said securing means.
Claim 4
Dependent Claim
70 words
An assembly of discs comprising: a cylindrical hub for supporting a stack of discs in parallelism and having a collar portion centrally located on its outer wall; a multiplicity of spacers disposed between said discs; means for securing said discs and spacers to said hub; and clamping means disposed between said securing means and said hub for controlling the clamping force resulting from the torque applied by said securing means.
Claim 5
Dependent Claim
21 words
An assembly as in claim 2, wherein the outside diameters of said collar, spacers, and clamping means are substantially the same.
Claim 6
Dependent Claim
36 words
An assembly as in claim 2, wherein said spacers have an outside diameter no larger than said collar, and said discs have an outside diameter substantially greater than said spacers to provide an extensive recording surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |