Seat cushion pad supporting construction

A seat cushion pad supporting construction comprising:

• a seat cushion base frame having an opening;
• a generally planer spring deck comprising a boundary frame and flexible support means disposed substantially over the opening, said flexible support means being connected between a front portion of the seat cushion pad supporting construction and a rear boundary frame portion of the boundary frame, said rear boundary frame portion having a rigidity such that the rear boundary frame portion substantially resists deformation during application of a load, wherein the rear boundary frame portion of the boundary frame includes means for providing greater rigidity to the boundary frame than other portions of the boundary frame;
• non-resilient connecting means for non-resiliently connecting the front boundary frame portion of the boundary frame to a front portion of the seat cushion base frame adjacent the opening to substantially prevent the front boundary frame portion of the boundary frame from moving at least in right-to-left directions and rolling about axes extending substantially in the fore-to-aft directions and up-and-down directions relative to the seat cushion base frame;
• and
• resilient connecting means for resiliently connecting the rear boundary frame portion of the boundary frame to a rear portion of the seat cushion base frame adjacent the opening so that at least a rear portion of the planer spring deck is shiftable substantially in said up-and-down directions.