Collapsible protable grill

Claim 1

IN A PORTABLE SELECTIVELY SELF-SUSTAINING AND COLLAPSIBLE GRILL, THE COMBINATION OF, (A) SIDE WALLS EACH COMPRISED OF A RECTANGULAR BODY PORTION HAVING ONE VERTICAL EDGE FLANGED REARWARDLY AT RIGHT ANGLES TO THE OUTER FACE OF SAID BODY PORTION AND TERMINATING A RE-ENTRANT FLANGE DISPOSED IN OVERLAPPING SPACED RELATION TO SAID FIRST FLANGE, (B) A SECOND VERTICAL EDGE OF SAID SIDEWALL BODY PORTION BEING PROVIDED WITH A FLANGE TURNED INWARDLY OVER THE OUTER FACE OF THE BODY PORTION AND DISPOSED IN SPACED RELATION THERETO, (C) A FLANGE ON THE BOTTOM EDGE OF THE SAID SIDE WALL BODY PORTION EXTENDING REARWARDLY FROM THE OUTER FACE OF THE BODY PORTION AND PROVIDING SUPPORT FOR A BOTTOM WALL, (D) A PLURALITY OF PERFORATIONS EXTENDING THROUGH SAID BODY PORTION ABOVE SAID BOTTOM FLANGE, (E) SAID SIDE WALLS BEING ASSEMBLED TOGETHER BY SLIDABLY ENGAGING ADJACENT VERTICAL EDGE FLANGES THEREOF WITH EACH SIDE WALL BOTTOM FLANGE FACING INWARDLY, (F) A RECTANGULAR BOTTOM WALL RECEIVED UPON SAID SIDE WALL BOTTOM FLANGES AND COMPRISED OF A BODY PORTION HAVING EACH MARGINAL EDGE THEREOF DISPOSABLE CLOSELY ADJACENT ONE OF SAID SIDE WALLS FOR RETAINING THE LATTER IN SUBSTANTIALLY FIXED RELATION TO EACH OTHER AND THE CORNERS OF SAID BOTTOM WALL BODY PORTION CHAMFERED TO PREVENT INTERFERENCE WITH SAID SIDE WALL FLANGES, AND (G) A GRID MEMBER OVERLYING SAID ASSEMBLED SIDE WALLS PROVIDING PASSAGEWAYS FOR ESCAPE OF PRODUCTS OF COMBUSTION FROM FUEL DISPOSED UPON SAID BOTTOM WALL, SAID GRID HAVING A HINGE CONNECTION TO THE TOP PORTION OF ONE SIDE WALL AND EXTENDING TO OVERLIE A FACE OF THE OPPOSITE SIDE WALL.