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:
Jun. 16, 1998
Filed:
Feb. 03, 1997
Shawn Casey, San Jose, CA (US);
Mats Anders Engwall, Hollister, CA (US);
Martin John McCaslin, Pleasanton, CA (US);
Western Digital Corporation, Irvine, CA (US);
Abstract
A head stack assembly for a disk drive includes a swing-type structure, a head gimbal assembly, and a coil. The swing-type structure has a bore defining a bore axis. The head gimbal assembly is cantilevered from the swing-type structure to project radially away from the bore axis. The head gimbal assembly includes transducing structure for writing to and reading from the recording surface of a disk. The coil is cantilevered from the swing-type structure to project radially away from the bore axis in a direction opposite from the head gimbal assembly. The coil has a shape to provide a current flow path that includes first and second multi-leg portions that are spaced from each other in a direction parallel to the bore axis. Each of the multi-leg portions is generally C-shaped, substantially perpendicular to the bore axis, open at its end that is remote from the bore axis, and includes two radially-extending legs such that the current flow path provides four radially-extending legs with the four radially-extending legs being positioned such that upon installation of the head stack assembly into the disk drive the four radially-extending legs occupy an annular region in which a magnetic field distribution exists.