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:
Mar. 17, 2009
Filed:
Apr. 18, 2008
Isao Takahashi, Miyagi-ken, JP;
Isao Takahashi, Miyagi-ken, JP;
ALPS Electric Co., Ltd., , JP;
Abstract
An electrostatic actuator having a simple structure including a reduced number of systems that supply driving voltages and a method for driving the electrostatic actuator. Stator electrodesincluding a plurality of electrical systems (A-phase electrodes, B-phase electrodes, and C-phase electrodes) are repeatedly disposed in a predetermined order in the moving direction. A pitch (cycle length)Pof the stator electrodesthat forms the electrical systems of the same type in the moving direction is equal to a pitch c of the mover electrodesin the moving direction, and the mover includes at least two types of mover electrodesandhaving different lengths.