Browse Prior Art Database

Magnetic Head Suspension Assembly

IP.com Disclosure Number: IPCOM000045309D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Bhat, MS: AUTHOR [+2]

Abstract

A magnetic head 1 supported on a spring suspension 2 is loaded and unloaded relative to a magnetic disk 3 by means of a shape memory strip 4. The strip of shape memory material is attached to the back of the head spring suspension.

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Magnetic Head Suspension Assembly

A magnetic head 1 supported on a spring suspension 2 is loaded and unloaded relative to a magnetic disk 3 by means of a shape memory strip 4. The strip of shape memory material is attached to the back of the head spring suspension.

Shape memory materials are a class of alloys, an example being nickel- titanium, that have the capability of remembering a preset shape. If a strip of this material is deformed below a certain temperature and is then heated above that temperature, the strip reverts to ts original shape.

During operation, the suspension spring provides a loading force to bring the head into transducing relation to the disk. To unload the head, current is applied from a current source to the shape memory material to vary the temperature of the shape memory strip. The amount of load applied to the head and speed of loading and unloading is controlled by the amount of current flow applied to the material, as well as to the load force of the suspension spring.

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