Pneumatic cushion socket with a porous filler

Claim 1

AN IMPROVED PROSTHESIS SOCKET FOR RECEIVING A STUMP AND MOUNTING IT WITHIN A BACK OPEN END PORTION OF AN ARTIFICIAL LIMB, A SLEEVE-LIKE BODY HAVING A BACK OPEN END PORTION ADAPTED TO RECEIVE THE STUMP, SAID BODY COMPRISING A PLIABLE AIR-TIGHT COVER OF FABRIC MATERIAL THAT HAS A SMOOTH OUTER SURFACE, SAID COVER HAVING SPACED-APART INNER AND OUTER SIDE WALLS ALONG SAID BODY AND CONNECTING END CLOSURE WALLS THAT SEAL-OFF SAID INNER AND OUTER SIDE WALLS TO PROVIDE A CLOSED-OFF INNER CHAMBER WITHIN AND ALONG THE SIDE WALLS OF SAID BODY, A LIGHTWEIGHT POROUS AND RESILIENT FILLER MATERIAL DEFINING A PLURALITY OF MINUTE AIR SPACES THEREWITHIN AND POSITIONED TO EXTEND FULLY ALONG THE CHAMBER BETWEEN SAID INNER AND OUTER SIDE WALLS TO FILL THE SPACING, SAID FILLER MATERIAL BEING SECURED ALONG ONE SIDE FACE TO ONLY ONE OF SAID SIDE WALLS AND HAVING A FREELY ABUTTING RELATION ALONG ITS OPPOSED SIDE FACE WITH THE OTHER OF SAID SIDE WALLS, SAID INNER SIDE WALL BEING ADAPTED TO RECEIVE AND FULLY CONFORM TO THE CONFIGURATIONS OF THE STUMP AND SAID OUTER SIDE WALL BEING ADAPTED TO FIT WITHIN THE OPEN END PORTION OF THE ARTIFICIAL LIMB, AND VALVE MEANS SECURED TO PROJECT FROM ONE OF SAID SIDE WALLS AND HAVING A PASSAGEWAY CONNECTED TO THE FREE ABUTTING SIDE FACE OF SAID FILLER MATERIAL FOR INTRODUCING AIR FULLY ALONG SAID FACE TO THE AIR SPACES THEREOF AND FOR EXPANDING THE AIR SPACES TO PROVIDE A DESIRED UNIFORM RESILIENT HOLDING STRENGTH TO SAID BODY FOR EFFECTIVELY SECURING THE ARTIFICIAL LIMB TO THE STUMP.