Portable bleacher construction

Claim 1

A portable bleacher construction comprising: a fixed bleacher section, said fixed bleacher section comprising a longitudinally extending base, a plurality of first seating stringers, a plurality of first leg support stringers located between and below adjacent ones of said first seating stringers, first support means for fixedly supporting said first seating and said first leg support stringers to said base in a tiered arrangement terminating at its uppermost end in an uppermost one of said first seating stringers and at its lowermost end in a lowermost one of said first seating stringers, and a guard rail extending above and longitudinally across the back of said uppermost one of said seating stringers, said first seating stringers and said first leg support stringers extending longitudinally for substantially the full length of said base; a plurality of movable bleacher sections located side by side for substantially the full length of said fixed bleacher section, each of said movable bleacher sections comprising a plurality of second seating stringers, a plurality of second leg support stringers located between and below adjacent ones of said second seating stringers, second support means for fixedly supporting said second seating and said second leg support stringers together in a tiered arrangement terminating at its uppermost end in an uppermost one of said second leg support stringers and at its lowermost end of a lowermost one of said second seating stringers, said uppermost second leg support stringer immediately succeeding and hence co-operating with said lowermost first seating stringer; hinge means pivotally connecting each said movable bleacher sections to said fixed bleacher section for separate movement of each said movable bleacher sections approximately from a folded nested condition with said fixed bleacher section to facilitate transportation when not in use to an unfolded position in line with and below said fixed bleacher section when in use, said hinge means connected to said lowermost first seating stringer, and pivot means operatively connected between said fixed bleacher section and each said movable bleacher section and selectively operable with a mechanical advantage for pivoting each said movable bleacher section to its folded and unfolded positions, and wheeled suspension means connected to said base and including a plurality of wheels for supporting saiD bleacher construction and towing means connectable to a towing vehicle such that said portable bleacher construction can be towed.