Mechanical ejector device incorporating a double-acting piston

A mechanical ejector device for double acting actuation of a piston, said mechanical ejector device comprising:

• a lever;
• a first fixed articulation axis about which said lever pivots;
• a first mobile articulation axis associated with said lever and spaced from said first fixed articulation axis, said first mobile articulation axis coupled to said piston;
• a second mobile articulation axis associated with said lever and parallel to said first mobile articulation axis;
• a sliding axis associated with said piston along which said first mobile articulation axis is movable, said sliding axis located a distance from said first fixed articulation axis;
• and
• means for mechanically articulating said lever to actuate said piston between a rest position and a service position, said mechanical articulating means connected to said lever on said second mobile articulation axis, said mechanical articulating means comprising:
• a first link having a third mobile articulation axis;
• a second fixed articulation axis about which said first link pivots;
• a second link articulated to said second mobile articulation axis, said second link having a fourth mobile articulation axis, said first link articulated to said fourth mobile articulation axis;
• and
• an actuator rod articulated to said third mobile articulation axis for displacing said third mobile articulation axis longitudinally in a single displacement direction from a first predetermined rest position to a final position, said actuator rod positioned transverse to said sliding axis.