Magnetic disc memory device

Details Magnetic disc memory device Magnetic disc memory device

1984-07-24

1987-04-07

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 97, G11B 1700, G11B 5012

Patent

active

046565450

ABSTRACT:
A magnetic disc memory device comprises a rotatable member, a stationary member for supporting the rotatable member, dynamic pressure bearing provided between the stationary member and the rotatable member, a plurality of information recording magnetic discs mounted in axially spaced apart relationship on the outer peripheral portion of the rotatable member, an annular rotor provided on the outer peripheral portion of the rotatable member in axially spaced apart relationship with the magnetic discs, an annular stator secured to the stationary member and radially facing the annular rotor, the stator and the rotor together constituting an electric motor, and a case secured to the stationary member and surrounding the magnetic discs, the rotatable member, the rotor and the stator to protect them from extraneous influence.

REFERENCES:
patent: 4251840 (1981-02-01), Maruyama
patent: 4301487 (1981-11-01), Maruyama
patent: 4346946 (1982-08-01), Maruyama
patent: 4363047 (1982-12-01), Maruyama et al.
patent: 4381528 (1983-04-01), Fujioka
patent: 4429336 (1984-01-01), Berube et al.
patent: 4487514 (1984-12-01), Mori
patent: 4547081 (1985-10-01), Tanaka et al.

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