Patent ID: 7154704

Claim:
A data storage device comprising: a stator comprising a baseplate having a vertical tube in a middle thereof, having an upwardly extending portion and a downwardly extending portion with respect to said baseplate, to which a plurality of stator laminations are attached, extending radially outward from said downward extending portion into an annular recess in said base plate surrounding said lower portion; a rotor including a shaft rotatably connected to the inside of said vertical tube by a plurality of bearings and defining two opposite ends with a hub connected to one end above said baseplate and a drive member connected to the other end below said baseplate; wherein the drive member comprises at least one magnet located in an outer position radially relative to said stator laminations and oppositely cooperating with said stator laminations, wherein said at least one magnet is in the form of an annular ring which surrounds the stator laminations with an air gap therebetween; a cover attached to said baseplate, to form, along with said baseplate, a clean chamber enclosing said drive member and said laminations in said annular recess, thereby shielding said drive member and preventing contaminants from accessing a bottom one of said plurality of bearings surrounding the shaft; and at least one data storage disk mounted on the hub.