Telescoping chair riser structure

Claim 1

A TELESCOPING SEATING STRUCTURE INCLUDING A PLURALITY OF SECTIONS ADAPTED FOR MOVEMENT BETWEEN RETRACTED AND EXTENDED POSITIONS WHEREIN EACH OF SUCH SECTIONS IS COMPRISED OF: A PAIR OF WHEELED CARRIAGE MEMBERS; A VERTICAL COLUMN ON EACH OF SAID CARRIAGE MEMBERS; A HORIZONTALLY EXTENDING ARM ON EACH OF SAID COLUMNS ADAPTED TO BE SUPPORTED ON THE TOP OF THE COLUMNS OF THE NEXT ADJACENT SECTION TOWARD THE FRONT OF THE SEATING STRUCTURE WHEN THE STRUCTURE IS IN EXTENDED POSITION; A FIRST LOAD BEARING MEMBER MOUNTED ON SAID VERTICAL COLUMNS AND EXTENDING BETWEEN THE UPPER PORTIONS THEREOF, SAID FIRST LOAD BERING MEMBER HAVING A SUPPORT SURFACE THEREON EXTENDING SUBSTANTIALLY THE LENGTH THEREOF; A SECOND LOAD BERING MEMBER MOUNTED ON SAID HORIZONTALLY EXTENDING ARMS AND EXTENDING BETWEEN THE FORWARD ENDS THEREOF, SAID SECOND LOAD BEARING MEMBER HAVING A SUPPORT SURFACE THEREON EXTENDING SUBSTANTIALLY THE LENGTH THEREOF; SAID SUPPORT SURFACES OF SIAD FIRST AND SECOND LOAD BEARING MEMBERS POSITIONED AT SUBSTANTIALLY THE SAME ELEVATION; A HORIZONTALLY DISPOSED SPECTATOR SUPPORTING PLATFORM MEMBER EXTENDING BETWEEN SAID FIRST AND SECOND LOAD BEARING MEMBERS AND SUPPORTED ON THE RESPECTIVE SUPPORT SURFACES OF SAID FIRST AND SECOND LOAD BEARING MEMBERS; AND SAID FIRST LOAD BEARING MEMBER HAVING A CLOSURE PORTION THEREON EXTENDING VERTICALLY UPWARDLY FROM SAID SUPPORT SURFACE THEREON, SAID CLOSURE PORTION OPERATIVE TO PREVENT OBJECTS FROM FALLING FROM THE REAR OF SAID PLATFORM MEMBER DOWN UNDERNEATH SAID SEATING STRUCTURE.