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. 26, 2002
Filed:
Mar. 20, 2000
Tomohisa Shingai, Kawasaki, JP;
Koichi Oikawa, Kawasaki, JP;
Shuji Koike, Kawasaki, JP;
Yoshiaki Sakamoto, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An ink jet head includes a pressure chamber, a vibration plate, and a piezoelectric element which is provided on the vibration plate and causes a volume displacement of the pressure chamber. The piezoelectric element has a thickness of 20 &mgr;m or less, and the pressure chamber and the piezoelectric element satisfy a relation V /(L b)>550×10 , where V [m ] denotes a volume displacement of the pressure chamber when the piezoelectric element is driven, L [m] denotes a width of the piezoelectric element, and b [m] denotes a depth of the pressure chamber.