Brushless motor assembly

Details Brushless motor assembly Brushless motor assembly

1997-11-18

1999-09-07

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 310 85, 310 89, H02K 515, H02K 510

Patent

active

059491655

ABSTRACT:
A brushless motor assembly for a magnetic disc drive device includes a bracket for the support of a fixed shaft carrying a stator core at a lower end thereof. A generally cylindrical hollow hub encircles the fixed shaft and carries a rotor magnet at a location confronting the stator core. The bracket is of a size sufficient to protrude into the hollow of the hub and defines a labyrinth seal between an outer peripheral face thereof and an inner peripheral face of a corresponding portion of the hollow of the hub.

REFERENCES:
patent: 4900958 (1990-02-01), Kitahara et al.
patent: 5047677 (1991-09-01), Mineta et al.
patent: 5061868 (1991-10-01), Iwazaki et al.
patent: 5214326 (1993-05-01), Yonei
patent: 5241229 (1993-08-01), Katakura et al.
patent: 5245234 (1993-09-01), Okada et al.
patent: 5391952 (1995-02-01), Simazu et al.
patent: 5396134 (1995-03-01), Mochizuki
patent: 5493157 (1996-02-01), Nakamura

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