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:
May. 12, 1998
Filed:
Oct. 21, 1996
Il Oung Park, Seoul, KR;
Abstract
The present invention relates to a spindle motor used in a hard disc drive or a magnetic recording/reproducing apparatus, wherein air discharge guiding arrangement prevents foreign matter such as lubricating particles and dust scattered in the bearings of the spindle motor from flowing into a clean space by guiding air flows in the direction opposite to the clean space, without using any separate hermetic seal. The arrangement is characterized in that an air discharge guiding member is fitted within the internal circumferential surface of the internal barrel or fitted onto the fixed shaft of the motor be interposed between the upper bearing and the lower bearing and is provided with spiral grooves are on the internal or external circumferential surface of the air discharge guiding member, and in that a horizontal bore is formed through the longitudinal intermediate portion of the shaft and a vertical bore is formed to be extended longitudinally from the lower end of the fixed shaft to the horizontal bore and to be communicated with the horizontal bore, whereby air flows generated by the spiral grooves can be discharged to the outside through the horizontal bore and vertical bore.