Device for dispensing drops of a liquid

摘要

A device for dispensing drops of a liquid is disclosed. The device comprises a liquid accelerating vessel ( 11 ) for receiving a volume of the liquid to be dispensed, a nozzle ( 14 ) which is directly mechanically connected with the liquid accelerating vessel ( 11 ), a bending element ( 15 ), having one portion ( 17 ) which is free to oscillate and driving means for causing bending oscillations of the bending element ( 15 ). The liquid accelerating vessel ( 11 ) has an inlet opening ( 12 ) and an outlet opening ( 13 ). The nozzle ( 14 ) has a passage ( 22 ) which is in fluid communication with the interior ( 21 ) of the liquid accelerating vessel ( 11 ). The driving means comprise a piezoelectric transducer ( 18 ) which is directly mechanically connected with the portion ( 17 ) of the bending element ( 15 ), which portion ( 17 ) is free to oscillate.