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:
Apr. 24, 1990
Filed:
Jun. 09, 1989
Applicant:
Inventors:
David A Brown, Saratoga, CA (US);
Donald V Daniels, Friday Harbor, WA (US);
Joel N Harrison, Monte Sereno, CA (US);
Assignee:
Quantum Corporation, Milpitas, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; H02K / ;
U.S. Cl.
CPC ...
360 7708 ; 360 7703 ; 360 7807 ; 360 7811 ; 360106 ; 310 / ;
Abstract
A higher performance, higher capacity, low cost fixed (Winchester) disk drive avoids the need of a servo surface and servo channel for head positioning by use of a mass balanced rotary actuator, a polyphase optical head position transducer coupled closely to the actuator and head position correction information sampled from the data surface by the data head.