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. 28, 1987
Filed:
Nov. 14, 1984
Dieter M Schulze, Saratoga, CA (US);
Lapine Technology, Milpitas, CA (US);
Abstract
A head lifter for a disk drive is electromagnetically actuated in order to securely remove the head/flexure assembly from the surface of the disk in order to avoid damage. The lifter operates in a fashion similar to a pair of scissors such that the motion of the armature in the electromagnetic loop produces motion in the opposite direction by the lifting arms thus accomplishing the lifting function. The lifting arms are specially shaped so as to securely retain the flexures away from the disk surface regardless of the relative location of the lifting arms with respect to the flexure. The lifting mechanism is provided with a magnetic shield which preserves the reliability of the data recorded on the disk. The lifting is accomplished by a spring which insures safe lifting in a power off condition. During normal operation of the disk drive, the electromagnetic loop draws a very low current in order to reduce the power requirements and further provide magnetic shielding. A unique dampener is also provided to control the rapid acceleration of the lifting arms during the picking movement of the armatures.