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. 13, 1987
Filed:
Nov. 14, 1985
Richard W Luoma, Chatfield, MN (US);
John R Reidenbach, Rochester, MN (US);
Clarence R Schwieters, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An actuator for positioning transducers with respect to a disk storage device data surface provides a substantially sealed head-disk enclosure from which the voice coil motor permanent magnets are excluded. The mounting flange-inner core member, end cap and collar and shorted turn provide a sealed enclosure about the transducer carriage, voice coil and working air gap of the voice coil motor (VCM) with the permanent magnet and outer core pieces assembled to the device thereafter. The permanent magnets can be excluded from the clean room assembly area and this source of the most destructive particulate contamination are outside the head-disk enclosure.