Stacked piezoelectric diaphragm members

Abstract

A diaphragm assembly (20) comprises at least two piezoelectric diaphragm members (22) arranged in a stacking direction (23). An interface layer (24) is situated between adjacent piezoelectric diaphragm members (22). The interface layer (24) in the stacking direction (23) is displaceable but incompressible. The interface layer (24) permits lateral movement of the adjacent piezoelectric diaphragm members (22) relative to the interface layer (24) in a direction perpendicular to the stacking direction (23). The interface layer (24) can comprise, for example, an incompressible liquid or a semi-liquid. A gasket (26) can be used to seal the incompressible substance in the interface layer if necessary.

Dependencies are inferred from the claim text.