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:
Sep. 17, 1991
Filed:
Jan. 07, 1991
Lloyd C Goss, Bloomington, MN (US);
Magnetic Peripherals Inc., Minneapolis, MN (US);
Abstract
A rotary actuator for a magnetic disc drive includes a stationary arcuate permanent magnet and a thin, arcuate voice coil formed of a single winding of aluminum wire. Both the magnet and voice coil are curved about a pivot axis of a rotating shaft supporting a movable head arm assembly of the rotary actuator. The coil is integral with the head arm assembly, and pivots the head arm assembly responsive to electrical current introduced into the coil. Opposite ends of the pivot shaft are received into fixed race bearings supported by spaced apart upper and lower bearing plates, one of which is slightly elastically deformed to secure the shaft by their restoring force. Leaf springs provide a biasing force against the selected bearing plate and cooperate with parallel, spaced apart flexure members in the selected bearing plate to compensate for thermal expansion coefficient mismatch.