Hydrodynamic seal for disc drive spindle motor

Details Hydrodynamic seal for disc drive spindle motor Hydrodynamic seal for disc drive spindle motor

1997-04-07

1998-11-24

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 1702

Patent

active

058416072

ABSTRACT:
A disc drive includes a disc drive motor and a chassis for providing a substantially contaminant-free cavity. The disc drive motor includes a fixed member coupled to the chassis and a rotor rotatable about the fixed member for rotating a magnetic storage disc in the contaminant-free cavity. A bearing interconnects the fixed member and the rotor. A viscous pump seal is located between the contaminant-free cavity and the bearing. The viscous pump seal includes a first pump surface carried by one of the fixed member and the rotor and a second, grooved pump surface carried by the other of the fixed member and the rotor. The first and second pump surfaces are separated by a gap. The viscous pump seal inhibits transfer of contaminants from the bearing to the contaminant-free cavity.

REFERENCES:
patent: 5142173 (1992-08-01), Konno et al.
patent: 5295028 (1994-03-01), Elsing
patent: 5323076 (1994-06-01), Hajec
patent: 5473484 (1995-12-01), Dunfield et al.
patent: 5600511 (1997-02-01), Dunfield et al.
patent: 5600514 (1997-02-01), Fukuzawa

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