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:
Feb. 27, 2001
Filed:
Dec. 22, 1998
Applicant:
Inventors:
Thomas Edward Karis, San Martin, CA (US);
Holavanahally S. Nagaraj, Morgan Hill, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ; G11B 1/900 ;
U.S. Cl.
CPC ...
C10M / ; C10M / ; G11B 1/900 ;
Abstract
The invention relates to a magnetic recording data storage device which can operate effectively at high rotational speeds. The magnetic recording device of the present invention comprises (a) a magnetic recording disk, (b) a spindle motor, (c) a head supported on an air bearing carrier, and (d) an actuator connected to the head carrier for moving the head across the rotating disk. The spindle motor comprises ball bearings lubricated by a grease comprising a polymeric amine and bis or tris (alkyl phenyl)phosphate. The grease improves rotational operation of the disk drive.