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:
Aug. 22, 2006
Filed:
Jun. 02, 2005
Robert P. Ryan, Mission Viejo, CA (US);
Ashok K. Desai, Westlake Village, CA (US);
Hemant Melkote, San Jose, CA (US);
Jenghung Chen, Cupertino, CA (US);
John R. Agness, Laguna Hills, CA (US);
Terry C. Dawson, San Diego, CA (US);
Robert P. Ryan, Mission Viejo, CA (US);
Ashok K. Desai, Westlake Village, CA (US);
Hemant Melkote, San Jose, CA (US);
Jenghung Chen, Cupertino, CA (US);
John R. Agness, Laguna Hills, CA (US);
Terry C. Dawson, San Diego, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A disk drive is discloses comprising a disk, a head connected to a distal end of an actuator arm, and a voice coil motor (VCM) for rotating the actuator arm about a pivot in order to actuate the head radially over the disk. If when a power failure occurs the radial location of the head is less than a predetermined distance from the outer diameter of the disk, the VCM is controlled to move the head toward the inner diameter of the disk and stopping the head before it reaches the inner diameter of the disk. The VCM is then controlled to move the head toward the outer diameter of the disk until the actuator arm unloads onto a ramp.