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:
Oct. 20, 2009
Filed:
Dec. 28, 2007
Peter Michael Baumgart, San Jose, CA (US);
Charles Raymond Davis, San Jose, CA (US);
Gary Allan Herbst, San Jose, CA (US);
Bernhard E. Knigge, San Jose, CA (US);
Charles Mathew Mate, San Jose, CA (US);
Bruce Alexander Wilson, San Jose, CA (US);
Peter Michael Baumgart, San Jose, CA (US);
Charles Raymond Davis, San Jose, CA (US);
Gary Allan Herbst, San Jose, CA (US);
Bernhard E. Knigge, San Jose, CA (US);
Charles Mathew Mate, San Jose, CA (US);
Bruce Alexander Wilson, San Jose, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A method according to one embodiment comprises detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk, the change being caused by head-disk contact. A method for detecting head-disk contact according to another embodiment comprises measuring a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk; detecting a change in the rotational velocity, the change being caused by head-disk contact; and correlating the change in rotational velocity with the head-disk contact.