Abstract: It is introduced a miniaturizable actuation device based on piezoelectric flexural transducer element, which can be fabricated easily and cost effective, for use in a fluid valve or other devices, the actuation device being suited to perform reproducible actuation deflections fast and precisely, uneffected by disturbing influences due to temperature changes and mechanical deformations of the housing. The actuation device according to the invention includes a fluid bearing 5 with a first surface 7, which is associated with the flexural transducer element 2, a second surface 8, which is associated with the housing 15, and a flowable power transmitting fluid 6 between the surfaces, to transmit the reaction forces and—moments resulting from the actuatro deflection from the flexural transducer element 2 to the housing 15.

Abstract: A Printhead, particularly suitable for viscous or particle-filled fluids, with multiple channels is proposed. A channel of the printhead is characterized by a micro-electro-pneumatic circuit 2 containing a series circuit between a first and second pressure level out of a micro-valve 18 and a pneumatic throttle 23, for generating a control pressure pc at the common pneumatic node 5 of micro-valve 18 and pneumatic throttle 23, further a drop-on-demand fluid ejector 4 with a diaphragm 8 actuated by the control pressure pc, the fluid ejector 4 controlling the fluid discharge through fluid outlet 6.