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. 05, 2009
Filed:
Nov. 21, 2005
Yao-hsin Huang, San Jose, CA (US);
Neyram Hemati, Saratoga, CA (US);
Charles D. Flanigan, San Jose, CA (US);
Chunjer Chuck Cheng, Saratoga, CA (US);
Yao-Hsin Huang, San Jose, CA (US);
Neyram Hemati, Saratoga, CA (US);
Charles D. Flanigan, San Jose, CA (US);
Chunjer Chuck Cheng, Saratoga, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A disk drive includes a base, and a spindle motor coupled to the base. The spindle motor includes a hub defining an axis of rotation. The disk drive further includes a disk disposed about the hub and including a disk inner diameter biased against the hub at a contact location of the hub. The disk drive further includes a balancing element including a cylindrical portion disposed about the hub. The balancing element further includes a first cavity defining a first cavity centroid disposed on a same side of the axis of rotation as the contact location, and a second cavity defining a second cavity centroid disposed on a side of the axis of rotation opposite the first cavity centroid. The second cavity centroid is spaced apart from the first cavity centroid in a direction along the axis of rotation.