Micropump for liquid feeding and dosing e.g. for ink jet printer, has annular displacement space defined in part by piezoelectric tube acting as a micromechanical transducer

摘要

The micropump has an annular displacement space (3) defined by 2 coaxial tubes (1,2), one of which is formed from a piezoelectric material, for operating as a micromechanical transducer, controlled by supplied electrical pulses for delivering liquid droplets at a jet plate (7), by periodic deformation of the displacement space