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:
Apr. 22, 2008
Filed:
Apr. 07, 2005
Erhard Schreck, San Jose, CA (US);
Francis P. Crimi, Los Altos, CA (US);
Jingbo Yu, San Jose, CA (US);
Michael Mallary, Sterling, MA (US);
Scott Hughes, Cupertino, CA (US);
Duc Bahn, San Jose, CA (US);
Mark Heimbaugh, Pleasanton, CA (US);
Kazuhiro Saito, San Jose, CA (US);
Andrew Lefebvre, Campbell, CA (US);
Joerg Ferber, San Jose, CA (US);
Xiaoping HU, Milpitas, CA (US);
Douglas J. Krajnovich, Santa Clara, CA (US);
Chris Hawks, Saratoga, CA (US);
Donald J Brunnett, Pleasanton, CA (US);
Bruce C Schardt, Tracy, CA (US);
Erhard Schreck, San Jose, CA (US);
Francis P. Crimi, Los Altos, CA (US);
Jingbo Yu, San Jose, CA (US);
Michael Mallary, Sterling, MA (US);
Scott Hughes, Cupertino, CA (US);
Duc Bahn, San Jose, CA (US);
Mark Heimbaugh, Pleasanton, CA (US);
Kazuhiro Saito, San Jose, CA (US);
Andrew LeFebvre, Campbell, CA (US);
Joerg Ferber, San Jose, CA (US);
Xiaoping Hu, Milpitas, CA (US);
Douglas J. Krajnovich, Santa Clara, CA (US);
Chris Hawks, Saratoga, CA (US);
Donald J Brunnett, Pleasanton, CA (US);
Bruce C Schardt, Tracy, CA (US);
Maxtor Corporation, Longmont, CO (US);
Abstract
A disk drive includes a rotatable storage disk, an actuator motor, a slider that magnetically interacts with the storage disk, and a drive circuitry. A portion of the slider moves between a first position wherein the slider does not contact the storage disk and a second position wherein the slider contacts the storage disk. The drive circuitry can detect when the position of the slider changes between these positions. In one embodiment, the drive circuitry monitors off-track movement of the slider to detect when the slider has moved between these positions. The drive circuitry can also current that is directed to the actuator motor that is used to compensate for off-track movement to detect when the slider moves between these positions. In yet another embodiment, the drive circuitry monitors a rotational velocity of the storage disk to detect approximately when the slider moves between these positions.