Piezoelectric pump, has U-piece with pivotable side pieces, where piezo actuator is arranged between side pieces and side pieces that are coupled to repository with changeable volume

摘要

The pump has a U-piece (5) with a pivotable side pieces (20, 30), where a piezo actuator (1) is arranged between the side pieces. The side pieces are coupled to a repository (14) with changeable volume, where the repository is formed as a folding bellow. The side pieces are connected with each other by a spring unit (13), where the spring unit is arranged between the repository and the actuator. A contact surface between transmission units (11, 12) and the side pieces is smaller than a contact surface between the transmission units and the actuator.