The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 1993
Filed:
Nov. 09, 1990
Iraj Jabbari, Santa Clara County, CA (US);
Brian L Phillips, Santa Clara County, CA (US);
Seagate Technology, Inc., Scotts Valley, CA (US);
Abstract
A disc drive assembly includes a brushless direct current drive motor having a stationary shaft and a hub rotatably mounted about the stationary shaft by upper and lower bearings. The hub includes an interior space for housing a stator which has magnetically active parts for magnetic interaction with a permanent magnet mounted on an inner surface of the hub. The brushless drive motor is releasably mounted on a disc drive base member having a centrally located boss. The boss cooperates with a lower surface of a stator support for maintaining the stator of the drive motor in spaced relation with respect to the disc drive base member so that a printed circuit connector may be disposed between the stator and the disc drive base member proximate the stator winding. The subject invention also includes a labyrinth seal in combination with a ferrofluidic seal to prevent contaminant particles generated by the bearings and other internal parts of the drive motor from escaping into a contaminant-free disc storage environment.