Fluidic device i.e. bidirectional peristaltic micropump, for delivering medicament, has spring elements bearing force from side of inlet opening, and membrane section pressed against pusher by force for movement into pre-stressed position

摘要

The device has a membrane section (72a) e.g. elastic wall, closing an inlet opening in a pre-stressed position and unclosing the opening in a less pre-stressed position. Spring elements (74, 76, 78, 80a, 80b) i.e. spiral spring elements, flexibly move the section into the pre-stressed position. A linear actuator (30) e.g. piezoelectric stack actuator, and a pusher are driven to move the section into the less pre-stressed position. The spring elements bear force from a side of the opening. The section is pressed against the pusher by the force for movement into the pre-stressed position.