Adjustable pneumatic support

Claim 1

A RESILIENTLY FLEXIBLE, FLUID HOLDING STRUCTURE FOR SUPPORTING AN OBJECT, COMPRISING: A PLURALITY OF ELONGATED, FLEXIBLE ENVELOPES, EACH ENVELOPE HAVING PARTITION MEANS DISPOSED THEREIN BETWEEN THE LENGTHWISE ENDS THEREOF AND DIVIDING EACH ENVELOPE INTO A PLURALITY OF COMPARTMENTS; CONNECTING MEANS FOR NORMALLY HOLDING SAID ENVELOPES TOGETHER IN PARALLEL, SUBSTANTIALLY COPLANAR POSITIONS; A PLURALITY OF FLEXIBLE CONDUITS, EACH OF SAID CONDUITS COMMUNICATING WITH ONE OF SAID COMPARTMENTS; HEADER MEANS COMMUNICATING WITH EACH OF SAID CONDUITS AT POINTS SPACED FROM SAID ENVELOPES, WHEREBY SAID FLUID CAN FLOW FREELY THROUGH SAID CONDUITS AND SAID HEADER BETWEEN SAID COMPARTMENTS, SAID CONDUITS HAVING PORTIONS BETWEEN SAID HEADER AND SAID ENVELOPES EXTENDING TRANSVERSELY OF A SUBSTANTIALLY STRAIGHT LINE; A FILLER CONDUIT COMMUNICATING WITH SAID HEADER MEANS; AND HINGED SUPPORT MEANS CONNECTED TO SAID ENVELOPES, EACH OF SAID CONDUITS HAVING SAID PORTION THEREOF MOUNTED UPON SAID SUPPORT MEANS AND EXTENDING TRANSVERSELY OF THE HINGED AXIS THEREOF SO THAT SAID LINE IS PARALLEL WITH AND ADJACENT TO SAID HINGE AXIS, SAID SUPPORT MEANS BEING HINGEDLY MOVABLE AROUND SAID HINGED AXIS INTO AND OUT OF A POSITION WHERE IN SAID PORTIONS OF SAID CONDUITS ARE PINCHED AT THE SAME TIME TO BLOCK THE FLOW OF FLUID THROUGH SAID CONDUITS.