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:
Jan. 03, 1989
Filed:
Oct. 09, 1987
David D Chang, Sherman Oaks, CA (US);
Micropolis Corporation, Chatsworth, CA (US);
Abstract
A Winchester or hard disk drive, with a head positioner rotor is provided with a bidirectional preloaded stop. The head positioner rotor is provided with a plate having two spaced stop surfaces, both of which engage a single stop, which may be in the form of a U-shaped spring, which is partially compressed, and which has two pivoted, high strength plastic members against which the stop surfaces of the head positioner rotor impinge. The plate may also be provided with a notch into which the armature of an electromagnet fits so that the head positioner rotor is locked in the position with the heads adjacent the drive spindle, when the drive is turned off. When the rotor is energized, and the disks get up to speed, the electromagnetic is energized, and the head positioner rotor is freed to move to a selected track for reading or writing digital information.