The mechanism contains a slider crank kinematic chain connected in parallel with a slider crank. The kinematic chain RRT´s joints are connected with the coupler and piston of the slider crank. By means of changing the geometrical lengths of the mechanism´s links, the coupler point M describe a range of coupler curves.
The file was generated with the CAD software ProEngineer for the geometrical dimensions: l1 = 16 mm, l2 = 80 mm, l2´ = 30 mm, l3 = 0 mm, l4 = 90 mm, y = -6 mm, α = 145°.