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:
May. 04, 1993
Filed:
May. 07, 1991
Joshua Lindsay, Redwood City, CA (US);
Philip W Rich, San Jose, CA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A bistable magnetic/electromagnetic latch sub-assembly for releasably latching a disk file actuator in order to park data transducer heads at a predetermined location of a data storage disk rotatably mounted to a base within a fixed disk data storage subsystem, comprises a mounting flange for mounting to the base in operative proximity to the disk file actuator, a latch body rotatably mounted to the mounting flange, the latch body including a permanent magnet and an actuator engagement latch. Plural detent pins extend from the mounting flange and limit rotational displacement of the latch body. The pins coact with the permanent magnet to hold the latch body at a release detent position and also to hold the latch body at an armed detent position wherein the actuator engagement latch is positioned to engage and latch the actuator. An electrical coil is fixed to the mounting flange in operative proximity to the permanent magnet and generates latch position switching fluxes for switching the latch body between the armed detent position and the release detent position in accordance with the direction of an intermittent actuation current flow.