Pump for air matresses

Claim 1

A PUMP FOR AN AIR MATTRESS HAVING WALLS FORMING A PLURALITY OF ELONGATED TUBULAR INTERCONNECTED SECTIONS COMPRISING AN ELONGATED FLEXIBLE CASING HAVING WALLS ADAPTED TO BE SECURED WITHIN ONE OF SAID SECTIONS, SAID CASING WALLS HAVING MEANS FORMING A FLAP-LIKE ONEWAY OUTLET AIR VALVE AT ONE END, SPRING MEANS FOR TENSIONING SAID CASING WALLS OUTWARDLY WHEREBY THE VOLUME WITHIN SAID CASING IS NORMALLY MAXIMIZED, A ONEWAY AIR INLET VALVE IN SAID CASING WALL AND PASSING THROUGH SAID SECTION WALL WHEREBY AIR MAY BE DRAWN FROM OUTSIDE SAID MATTRESS INTO SAID CASING, AND A SECOND AIR INLET VALVE IN SAID CASING WALL IN AN AREA OPPOSITE SAID FIRST AIR INLET VALVE, SAID SECOND AIR INLET VALVE COMPRISING MEANS FORMING A LOWER OPENING IN SAID CASING WALL, AN ANNULAR RESILIENT CUSHION SURROUNDING SAID LOWER OPENING WITH MEANS FORMING AIR PASSAGES NORMALLY OPEN IN SAID RESILIENT CUSHION WHEN SAID CUSHION IS UNCOMPRESSED AND CLOSED WHEN SAID CUSHION IS UNDER COMPRESSION, SAID AIR PASSAGES INTERCONNECTING THE INTERIOR OF SAID CASING AND THE INTERIOR OF SAID SECTIONS.