Mechanism for transforming furniture from a sitting position to a lying down position

An apparatus for transforming an article of furniture from a sitting position to a lying down position, the article of furniture having a backrest and a seat, the apparatus comprising:

• a pair of jacks having an identical configuration, one jack of said pair of jacks being a mirror reflection of another jack of said pair of jacks;
• a synchronization mechanism connecting the one jack to the other jack of said pair of jacks, wherein each of said pair of jacks comprises:
• a fastening plate affixed to each of said pair of jacks, said fastening plate adapted to attach the jack to the article of furniture;
• an upper angle bar;
• a lower angle bar, said upper angle bar and said lower angle bar adapted to connect to the seat;
• a front pull rod having a center arm;
• a rear pull rod having a center arm, said front pull rod and said rear pull rod having one end articulated to said upper angle bar, said front pull rod and said rear pull rod having an opposite end articulated to said fastening plate, the center arm of said front pull rod and the center arm of said rear pull rod being articulated to said lower angle bar;
• and
• a backrest driving assembly having only a backrest rotation link and a bracket adapted to connect to the backrest of the article of furniture, said backrest rotation link articulated on one end to a bottom end of said rear pull rod and an opposite end hinged on to the bracket, the bracket being hinged to said fastening plate, wherein said backrest driving assembly raises or lowers the backrest relative to a position of the seat.