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:
Feb. 23, 1982
Filed:
Dec. 03, 1979
William J Gervais, Northridge, CA (US);
Micropolis Corporation, Chatsworth, CA (US);
Abstract
A compact, high capacity rigid magnetic disk storage system includes three 8-inch disks in an assembly only 45/8 inches high complete with electronics. The system includes two separate sections, a first section containing the electronics, the disk drive motor, and other similar active components, and a second 'clean zone' section, separated by a central cast web or partition. Within the second clean zone area are a stack of three rigid disks, the recording heads, and arrangements for positioning the recording heads; and a special filtering circuit through which air is circulated over the surface of the disks. The air circulation and filtering arrangements within the second clean zone area of the system include a special hollow hub assembly on which the rigid disks are mounted, with the hub assembly having a series of spaced radial apertures opening both to the spaces between the disks and also to the end of the hub facing away from the motor. Air is drawn from the end of the hub through the slots and out across the surfaces of the disks through centrifugal pumping action as the hub assembly and the disks rotate. A filter assembly includes a housing which defines an ultra-clean low pressure zone which is formed as air is drawn through a filter unit located to one side of the disks. The filter housing directs the air from the filter unit and confines it to flow toward the end of the rotating hub; and the housing assembly adjacent the hub and extending over the disks is of very limited extent in the direction parallel to the axis of the hub and the disks, to minimize the additional space which is required.