Mattress with pump and method for forming same

Claim 1

IN AN AIR TIGHT, INFLATABLE MATTRESS HAVING A PLURALITY OF PNEUMATICALLY CONNECTED AIR CELLS INCLUDING AT LEAST ONE CELL CLOSED AT ONE END, AND HAVING A CELL WALL, THE COMBINATION OF A FISH TAIL VALVE OF FLEXIBLE SHEET MATERIAL EXTENDING ACROSS, AND HAVING ONE END PERIPHERALLY AFFIXED TO THE WALL OF, SAID ONE CELL AND DEFINING A PUMP CHAMBER BETWEEN SAID VALVE AND SAID CLOSED END, SAID FISH TAIL VALVE HAVING A ONE WAY AIR OUTLET PORT FOR DELIVERING AIR FROM SAID CHAMBER TO THE REMAINDER OF SAID CELLS; A ONE WAY AIR INLET VALVE IN THE WALL OF SAID ONE CELL FOR SUPPLYING AIR TO SAID CHAMBER; CELL DISTENDING MEANS WITHIN SAID CHAMBER COMPRISING AN ELONGATED, OPEN ENDED TUBE OF SOFT, DEFORMABLE, SELF SUPPORTING PLASTIC SUBSTANTIALLY CO-EXTENSIVE IN LENGTH WITH SAID CHAMBER AND NORMALLY OF HOLLOW CYLINDRICAL CROSS SECTION AND METAL SPRING TUBE DISTENDING MEANS EXTENDING TRANSVERSELY ACROSS THE INTERIOR OF SAID TUBE FOR RAPIDLY RESTORING SAID TUBE TO NORMAL CROSS SECTION AFTER FLATTENING.