Folding seat assemblage to attach to a luggage cart and its deployment linkage

A folding seat attached to a luggage cart, comprising:

• a seat pivotally attached to structural support members that frame the luggage cart, said seat attached with interface hinge fittings that can be clamped, bolted, riveted or welded to the structural support members of the luggage cart, said seat, when pivoted to a stowed position, will stand upright against the frame of said cart and when pivoted to a deployed position will extend horizontally;
• a U-shaped support member attached at or near the center of the seat that can rotate from a supporting position depending perpendicular under said seat when said seat is in the deployed position, to a retracted position flat against the seat when the seat is in the stowed position;
• a pair of guide links that guide the U-shaped support member during rotation from the supporting position to the retracted position;
• a torsion spring at said interface hinge fittings biasing said seat to the stowed position;
• a linkage that rotates said seat from said stowed position to said deployed position, wherein said linkage comprises:
• a U-shaped push/pull handle having a cross bail and two legs, a pair of extension arms, each having two ends, attached to each leg of said push/pull handle at one of the ends, a pair of long connecting links, each with pivot joints at each end, wherein one end of each long connecting link is pivotally attached to the other end of the respective extension arm, and the other end of each of said long connecting link is pivotally attached to said seat;
• and
• wherein rotation of the push/pull handle from a horizontal position to a vertical position provides head room for a seat occupant, and automatically deploys said seat from said stowed position to said deployed position.