Magnetic brake for disk drive

Details Magnetic brake for disk drive Magnetic brake for disk drive

2007-03-06

2007-03-06

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

C360S073030

Reexamination Certificate

active

10742093

ABSTRACT:
A magnetic brake to prevent rotation of the spindle motor and disk(s). The magnetic brake includes two magnets, one attached to the spindle, clamp, disk, or motor, and the other magnet is coupled to the drive housing or to a movable member. Before the drive is installed in a computer, storage array, etc., the magnet coupled to the housing is removed externally, or the movable member is moved to free rotation of the spindle motor and disk(s). The movable member can also be caused to move automatically when a cable is attached to the drive. An alternate embodiment wraps a wire coil around one of the magnets to counter its magnetism upon energization, freeing the spindle motor and disk(s).

REFERENCES:
patent: 3659170 (1972-04-01), Burkett et al.
patent: 3665231 (1972-05-01), Wendler
patent: 4090117 (1978-05-01), Sasamoto et al.
patent: 4139874 (1979-02-01), Shiraishi
patent: 4646422 (1987-03-01), McMurtry
patent: 5388094 (1995-02-01), Park
patent: 6728059 (2004-04-01), Liu et al.
patent: 1-128282 (1989-05-01), None
patent: 2-79277 (1990-03-01), None

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