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, 1998
Filed:
Oct. 08, 1996
Evert M Kamerbeek, Eindhoven, NL;
U. S. Philips Corporation, New York, NY (US);
Abstract
An information storage unit comprises a frame (1), a magnetic information disc (9, 10), particularly a magnetic hard disc, which is rotatable about an axis of rotation (910). A magnetic head (52-55) is arranged on a pivotable support (56-59), and a lifting device lifts the magnetic head from the information disc. The lifting device comprises an electromagnetic actuator (62-65) having a first actuator part which is stationary relative to the frame and a second actuator part arranged on a movable portion (56b-59b) of the support. When the actuator is energized these actuator parts cooperate with one another via an air gap to generate a lifting force. Such an energization is effected particularly when a scanning operation is started and stopped, in order to preclude damaging of the information disc. Energization requires a comparatively small amount of energy and the measure has a favorable effect on the required starting torque.