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:
Dec. 15, 1992
Filed:
Oct. 22, 1991
Katsuaki Ishida, Nagano, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A swing head arm type magnetic disc apparatus includes a magnetic disc having a data R/W zone and a CSS zone, and is accommodated in a housing and a spindle rotably supported on the housing, a head arm provided with a floating-type magnetic head and secured to the spindle, a motor for driving the spindle when a seek operation is performed, and apparatus for imparting torque to the spindle. The torque imparting apparatus imparts torque such that the total torque obtained by summing up torque provided by a head arm and the torque by the torque imparting apparatus itself is made uniform irrespective of rotational position of a head arm, and acts in a direction which causes the magnetic head to move toward the CSS zone.