Patent ID: 7026746

Claim:
A device for displacing a moving part along a longitudinal axis relative to a housing, said device being symmetrical about a plane extending longitudinally relative to the moving part, the device comprising: two structures, each structure comprising a plate and two oblique pushers linked to the plate, a pusher being secured at one of its ends to the moving part and to a diaphragm connected to the inside of the housing and another pusher being secured at one of its ends to means for displacing the structure along the longitudinal axis relative to the housing for adjusting a displacement zero position of the moving part and to a diaphragm connected to the inside of the housing, and two blocks of active material extending between the plates, the elongation directions of the blocks being antisymmetrical about an axis substantially perpendicular to the displacement axis of the moving part, wherein the structures are flexible and suitable for displacing the moving part by deforming as a function of the elongation of the blocks.