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. 17, 2008
Filed:
Sep. 22, 2004
Hiroyuki Ishikawa, Nisshin, JP;
Hiroto Sugahara, Ama-gun, JP;
Hiroyuki Ishikawa, Nisshin, JP;
Hiroto Sugahara, Ama-gun, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
There is disclosed a liquid delivery apparatus comprising a pressure chamber accommodating a liquid and communicated with an opening, and a piezoelectric actuator plate which is disposed to close the pressure chamber and is deflected to deliver the liquid accommodated in the pressure chamber through the opening. The actuator plate has a laminated structure including: a piezoelectric layer which is deformable at least in a planar direction thereof by an application of an electric field to the piezoelectric layer; and a planar diaphragm laminated at one of opposite surfaces thereof to the piezoelectric layer, the one surface comprising a fixed portion which is fixed to the piezoelectric layer, and a non-fixed portion which is not fixed to the piezoelectric layer and is provided over a central part of the pressure chamber.