Patent ID: 6805329
Filing Date: 2004-10-19
Classification: F02M

Abstract:
In a valve for controlling fluids for a reservoir injection system, including a hydraulic coupler (2) with a first piston (3), a second piston (6), and a fluid-filled coupler chamber (7) disposed between the two pistons, a piezoelectric actuator (13), which is in communication with the first piston (3), the improvement wherein the first piston (3) is embodied as substantially cup-shaped and has a recess (4) and an inner bottom region (5); the second piston (6) is disposed in the recess (4) in the first piston (3); the coupler chamber (7) is disposed between the second piston (6) and the inner bottom region (5) of the first piston (3); and a rigid guide element (8; 8â€²) disposed in the recess (4) of the first piston (3), for guiding the second piston (6) in the recess of the first piston (3).