Folding back stacking chair structure

Claim 1

A STACKING CHAIR COMPRISING A RIGHT LATERAL LEG ASSEMBLY AND A LEFT LATERAL LEG ASSEMBLY, EACH ASSEMBLY COMPRISING A FRONT LEG, A REAR LEG, AND A LATERAL FRAME MEMBER CONNECTING THE UPPER ENDS OF SAID LEGS, SAID FRONT AND REAR LEGS BEING ARRANGED DOWNWARDLY DIVERGENT WITH RESPECT TO EACH OTHER, THE POSTERIOR SIDES OF SAID FRONT LEGS AND THE ANTERIOR SIDES OF SAID REAR LEGS BEING PROVIDED WITH BUMPER MEANS TO PREVENT DEFACING OF THE SURFACES OF ADJACENT CHAIRS WHEN STACKED THEREON, A FRONT TRANSVERSE FRAME MEMBER CONNECTING THE FRONT PORTIONS OF SAID LATERAL LEG ASSEMBLIES, AND A REAR TRANSVERSE FRAME MEMBER HAVING A CIRCULAR CROSS-SECTION CONNECTING THE REAR PORTIONS OF SAID LATERAL LEG ASSEMBLIES, A FOLDING BACK COMPRISING A WEB HAVING A VERTICAL FRAME MEMBER CONNECTED TO EACH SIDE THEREOF, ONE END OF EACH VERTICAL FRAME MEMBER TERMINATING IN AN OFFSET LEVER MEMBER HAVING AN OPENING PROVIDED THEREIN DIVIDING SAID LEVER MEMBER INTO A PROXIMAL LEVER ARM AND A DISTAL LEVER ARM, THE DISTAL ENDS OF SAID OFFSET LEVER MEMBERS BEING PROVIDED WITH BUMPER GUARDS TO PREVENT DEFACEMENT OF AN ADJACENT CHAIR WHEN STACKED THEREON, THE ENDS OF SAID REAR TRANSVERSE FRAME MEMBER BEING JOURNALLED THROUGH THE OPENINGS OF SAID LEVER MEMBERS AND PERMITTING SAID FOLDING BACK TO PIVOT THEREON, A SEAT SUITABLY MOUNTED ON SAID CHAIR HAVING A CUSHION MOUNTED THEREON AND WHEREIN THE CONTOURS OF THE REAR CORNERS OF SAID SEAT AND CUSHION ARE RECESSED TO PERMIT SAID OFFSET LEVER MEMBERS TO CLEAR SAID SEAT AND SAID CUSHION WHEN SAID BACK IS FOLDED DOWN, SAID PROXIMAL LEVER ARMS BEING OF SUFFICIENT LENGTH TO ENABLE SAID BACK TO CLEAR SAID SEAT AND SAID CUSHION WHEN SAID BACK IS FOLDED DOWN, SAID LATERAL FRAME MEMBERS BEING POSITIONED EXTERIOR OF THE LATERAL EDGES OF SAID SEAT, AND LIMIT MEANS ENGAGING SAID DISTAL LEVER ARMS WHEN SAID BACK IS ERECTED FOR RESTRAINING SAID BACK IN A SUITABLE VERTICAL POSITION, WHEREBY SAID BACK MAY BE FOLDED DOWN TO PERMIT A PLURALITY OF CHAIRS TO BE TELESCOPED OVER ONE ANOTHER AND TO BE ARRANGED IN A VERTICAL STACK.