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:
Jun. 23, 1992
Filed:
Nov. 05, 1990
Applicant:
Inventor:
Jack S Swartz, San Jose, CA (US);
Assignee:
Areal Technology Corp., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ; H02K / ; H02P / ; H02P / ;
U.S. Cl.
CPC ...
310 / ; 318254 ; 310268 ;
Abstract
An axial gap motor for use in a disk drive includes a rotatable magnet rotor and fixed first and second windings closely spaced from the rotor. The rotor and windings are disposed coaxially about a rotatable spindle to which the rotor is mounted. Current supplied to one winding actuates the rotor to rotate in a run mode. Current supplied to the other winding positions the rotor for maximum torque for starting the motor, and enables the sensing of the speed of the rotating rotor.