Piezoelectric actuator

Details Piezoelectric actuator Piezoelectric actuator

2005-12-06

2005-12-06

Meier, Stephen (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

06971738

ABSTRACT:
A first portion F is positioned above the center of the pressure chamber16.A pair of second portions S are disposed on either side of the first portion F. The electrodes24, 25are positioned in the second portion S to the side farthest in the thickness direction from the pressure chamber16.When voltage is developed between the electrodes24, 25,the polarized active portions40of the piezoelectric sheets54–56that are sandwiched between the electrodes24, 25contract in the planar direction, so that the second portion S arches downward. As a result, the first portion F is pushed upward and protrudingly arches upward so that the volume of the pressure chamber16increases.

REFERENCES:
patent: 4825227 (1989-04-01), Fischbeck et al.
patent: 5402159 (1995-03-01), Takahashi et al.
patent: 5594292 (1997-01-01), Takeuchi et al.
patent: 6575565 (2003-06-01), Isono et al.

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