Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1996-02-16
1997-12-02
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9905, 360 9912, G11B 17022
Patent
active
056942699
ABSTRACT:
An improved disk drive spindle hub assembly for a hard disk drive includes a spindle hub having a generally annular groove with an internal thread formed therein, on a top surface and a portion of the top surface radially outward from the annular groove forming an upwardly extending peripheral ring. A stack of information storage disks is journaled about the spindle hub in a spaced-apart, vertically aligned relation. Annular spacers are positioned between adjacent ones of the information storage disks in order to space the disks apart in the vertically aligned relation of the spindle hub. A disk clamp configured to concentrically clamp the stack of information storage disks in axial alignment with the spindle hub. The disk clamp is fabricated from a single piece to include a head portion, a downwardly projecting peripheral ring having a bottom surface facing a surface of a top annular spacer, and a cylindrical post extending from the center of the head portion and having an external thread formed thereon for allowing mutual engagement with the internal thread formed in the annular groove of the spindle hub, so that when that disk clamp is screwed on the spindle hub, the stack of information storage disks is concentrically secured to the spindle hub.
REFERENCES:
patent: 4755981 (1988-07-01), Ekhoff
patent: 4933927 (1990-06-01), Ross
patent: 5031061 (1991-07-01), Hatch
patent: 5136450 (1992-08-01), Moir
patent: 5148338 (1992-09-01), Fruge360 98.07
Besha et al, "Disk Pack Compliance Clamp", Jul. 1978, IBM Technical Disclosure Bulletin, vol. 21 No. 2, pp. 802-803.
Reidenbach, "Method For Disk File Disk Clamping", Nov. 1981, IBM Technical Disclosure Bulletin, vol. 24 No. 6, pp 2765-2766.
Bushnell Esq. Robert E.
Korzuch William R.
Levy Stuart S.
Samsung Electronics Co,. Ltd.
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