Conductive contact for an air bearing spindle

Details Conductive contact for an air bearing spindle Conductive contact for an air bearing spindle

1996-12-30

1998-07-21

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310254, 310261, 360 988, 360102, H02H 700

Patent

active

057838828

ABSTRACT:
A spindle motor assembly which utilizes a reservoir of electrically conductive fluid to provide a conductive path through the assembly. The spindle motor assembly includes a spindle shaft that is located within a housing and rotated by an internal motor. The end of the spindle shaft is located within the reservoir. The reservoir also is electrically coupled to the housing. The electrically conductive fluid provides a conductive path between the spindle and the housing while minimizing the frictional forces on the spindle. The spindle may be coupled to a chuck that holds a magnetic disk within a disk certifier. The magnetic disk is electrically grounded to the housing through the chuck, the spindle and the electrically conductive fluid.

REFERENCES:
patent: 3784853 (1974-01-01), Wangsness
patent: 4101945 (1978-07-01), Butsch
patent: 4589707 (1986-05-01), Caye et al.
patent: 4627288 (1986-12-01), Guzik et al.
patent: 4934198 (1990-06-01), Doemens

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