Disc drive slider lifter using shape memory metals

Details Disc drive slider lifter using shape memory metals Disc drive slider lifter using shape memory metals

1990-04-05

1991-10-22

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 554, G11B 2122

Patent

active

050600990

ABSTRACT:
A slider lifter arrangement is provided for conventional disc drive assemblies. The slider lifter includes a wire support having a pair of wire support arms extending outward from a head positioning assembly adjacent opposite sides of a flexure arm that carries a slider. A lifting wire is strung between the opposing wire support arms in the space between the flexure arm and the disc surface. The lifting wire is formed from a shape memory alloy having martensitic and austenitic phase conditions. The wire is arranged to lift the flexure arm sufficiently to lift the slider off of the disc surface when the wire is in a first phase condition while allowing the slider to rest on the disc surface when the wire is in a second phase condition. The wire is selectively electrically heated to change its state from one phase condition to the other. The wire support is preferably formed integrally with the flexure assembly. The lifting wire is also preferably coated with an insulating material.

REFERENCES:
patent: 4605979 (1986-08-01), Inoue
patent: 4684913 (1987-08-01), Yaeger

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