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:
Nov. 23, 1999
Filed:
Jul. 01, 1998
Kent J Forbord, St. Louis Park, MN (US);
Seagate Technology, Inc., Scotts Valley, CA (US);
Abstract
An improved rotary actuator for supporting heads relative to a disc of a disc drive for operation. The rotary actuator includes an actuator block pivotally connected to a chassis of a disc drive. The actuator block includes an actuator arm for supporting heads. The actuator block supports a coil assembly adapted for operation in a magnetic field to form a voice coil motor. The coil assembly includes a plurality of wound coils supported by the actuator block at spaced elevations and having a portion of spaced coils overlapped to reduce the operating area for the voice coil motor. The geometry of the coils reduces off-track force excitation of the rigid body resonance to allow for high bandwidth servo. The coil assembly also reduces off-track force during settle in for improved seek times.