Liquid delivering device

Details Liquid delivering device Liquid delivering device

2007-08-07

2007-08-07

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

10944191

ABSTRACT:
A liquid delivering device including: (a) a cavity unit defining pressure chambers; and (b) a piezoelectric actuator unit superposed on the cavity unit, and having active portions opposed to the respective pressure chambers and selectively deformable upon application of a drive voltage thereto so as to deliver a liquid from the corresponding pressure chambers to the exterior. The actuator unit includes first and second flexible layers, and a piezoelectric material layer interposed between the first and second flexible layers. A portion of the piezoelectric material layer located in a central region of each active portion is offset from a center of the piezoelectric actuator unit, as viewed in a thickness direction of the actuator unit, in one of a direction toward the cavity unit and a direction away from the cavity unit, while a portion of the piezoelectric material layer located in an outer region of each active portion is offset from the above-described center, as viewed in the thickness direction, in the other of the direction toward the cavity unit and the direction away from the cavity unit.

REFERENCES:
patent: 5581861 (1996-12-01), Lee et al.
patent: 2003/0081079 (2003-05-01), Mitsuhashi et al.
patent: A-58-108163 (1983-06-01), None
patent: 04099636 (1992-03-01), None

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