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:
Feb. 03, 2009
Filed:
Dec. 08, 2005
Chiang-cheng Huang, Taipei, TW;
Chun-min Chang, Miaoli County, TW;
Chien-chung Sun, Taipei, TW;
Risun Expanse Corp., Taipei, TW;
Abstract
A direct current (DC) brushless vibration motor includes an inductive coil as the stator, and a magnetic element, which has a plurality of coplanar magnetic poles, as the rotor. The inductive coil is a single annular coil formed by a singly-wound conductive wire. The winding area corresponds to two magnetic poles of the magnetic element of the like polarity at opposite sides. The magnetic element has a centrifugal slot to make the gravity center of the magnetic element eccentric from the axis. When current is input into the inductive coil to form a magnetic field, the magnetic element and the magnetic field generated by the inductive coil repulse each other to generate rotation. The eccentric gravity center of the magnetic element can generate the vibration desired.