Data storage device with reduced rotor inertia

Details Data storage device with reduced rotor inertia Data storage device with reduced rotor inertia

2005-07-05

2005-07-05

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

06914359

ABSTRACT:
A data storage device (10) includes a housing enclosing a clean room chamber (CR), a stator (20), a rotor (40), and a plurality of data storage disks (60). The housing includes an upper partition (12) and a lower partition (14). The stator includes a plurality of stator laminations (22) each having a winding (24) wound therearound, and a shaft (30) having opposite ends fixed with the upper partition and the lower partition. The rotor includes a hub (44), a tube (42) fixed in the hub, and a magnet (46) surrounded by the stator laminations. The hub includes a radially extending shoulder (45) for supporting the disks thereon. The tube surrounds the shaft, with a pair of bearings (50) rotatably connecting the tube to the shaft. A clamp (80) is secured on the hub, and presses on a top one of the disks to mount the disks to the hub.

REFERENCES:
patent: 5444586 (1995-08-01), Iftikar et al.
patent: 5768051 (1998-06-01), Kora et al.
patent: 5877916 (1999-03-01), Papst
patent: 6344946 (2002-02-01), Papst
patent: 2003/0197438 (2003-10-01), Oku
patent: 2004/0061404 (2004-04-01), Fujii et al.
patent: 2004/0104634 (2004-06-01), Nishimura et al.

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