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. 24, 2002
Filed:
Aug. 03, 2001
Applicant:
Inventors:
Mitsugu Irinoda, Miyagi, JP;
Yukito Satoh, Miyagi, JP;
Junichi Azumi, Miyagi, JP;
Kaihei Isshiki, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/04 ;
U.S. Cl.
CPC ...
B41J 2/04 ;
Abstract
An electrostatic actuator includes a diaphragm caused to vibrate by electrostatic force, an electrode substrate opposing the diaphragm, an electrode formed on the electrode substrate so as to oppose said diaphragm with a gap being formed between the electrode and the diaphragm, an anti-corrosive thin film formed on said diaphragm, and diaphragm deflection prevention means preventing the diaphragm from deflecting.