Browse Prior Art Database

Reworkable Mechanical Fastener

IP.com Disclosure Number: IPCOM000046288D
Original Publication Date: 1983-Jun-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Watrous, RB: AUTHOR

Abstract

Present magnetic recording disk file head arms carry a number of read/ write (R/W) head/suspension assemblies. Each of these assemblies is attached to the arm with a pair of screws. These screws are in turn secured with epoxy to prevent loosening due to vibrations induced by machine operation. If a R/W head is defective or damaged, it must be possible to replace that R/W head without disturbing the remainder of the arm assembly. Presently this is done by scraping away the epoxy securing the two screws, removing the screws, and installing a new R/W head/suspension assembly.

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Reworkable Mechanical Fastener

Present magnetic recording disk file head arms carry a number of read/ write (R/W) head/suspension assemblies. Each of these assemblies is attached to the arm with a pair of screws. These screws are in turn secured with epoxy to prevent loosening due to vibrations induced by machine operation. If a R/W head is defective or damaged, it must be possible to replace that R/W head without disturbing the remainder of the arm assembly. Presently this is done by scraping away the epoxy securing the two screws, removing the screws, and installing a new R/W head/suspension assembly.

Shown here is an alternate and improved method of attaching head/ suspension assemblies to the arm, as seen in the figure. Two or more stainless steel balls are pressed into undersize holes in the aluminum arm. The stainless steel suspension mount is welded to the balls to provide a positive vibration- immune connection. Head/suspension replacement is accomplished as follows: A wedge-shaped tool is used to lift the suspension mount away from the arm. This operation also extracts the balls from the arm since the balls are welded to the suspension mount. New balls, slightly larger than the previous ones, are then pressed into the arm and a new head/suspension assembly is welded in place.

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