Two-piece molding fastener

Claim 1

THE COMBINATION OF A FASTENING DEVICE AND AT LEAST TWO APERTURED SUPPORTS, SAID FASTENING DEVICE COMPRISING A PIN AND A SHEATH, SAID PIN HAVING A CYLINDRICAL CORE ELEMENT, A HEAD FORMED IN INTEGRAL RELATIONSHIP WITH ONE END OF SAID CORE ELEMENT, THE OTHER TERMINAL END HAVING A MEANS OF ENGAGING A PORTION OF SAID SHEATH AND HAVING A GROOVE FORMED ADJACENT THERETO AND AT LEAST ONE EXPANDER ELEMENT HAVING A DIAMETER GREATER THAN SAID CORE ELEMENT AND FORMED A PREDETERMINED DISTANCE FROM SAID HEAD AND FROM SAID OTHER TERMINAL END AND SAID SHEATH COMPRISING A TUBULAR BODY ELEMENT FORMED OF AN ELASTICALLY DEFORMABLE MATERIAL OPEN AT BOTH ENDS AND HAVING A COLLAR EXTENDING IN INTEGRAL RIGHT ANGLE RELATIONSHIP ADJACENT ONE OF SAID ENDS AND HAVING A DIAMETER GREATER THAN THE EXTERNAL DIAMETER OF SAID TUBULAR BODY ELEMENT AND THE OTHER END HAVING AN OPENING OF LESS DIAMETER THAN THE REMAINING INTERNAL DIAMETER OF SAID TUBULAR BODY ELEMENT TO FORM A RESTRICTED END, EACH OF SAID SUPPORTS HAVING AN INNER WALL FORMING AN APERTURE THERETHROUGH BOTH OF SAID INNER WALLS CIRCUMSCRIBING A PORTION OF SAID TUBULAR BODY ELEMENT IN CLOSE PROXIMITY TO SAID COLLAR AND SAID COLLAR IN SUPERPOSED ABUTTING RELATIONSHIP TO ONE OF SAID SUPPORTS ADJACENT SAID INNER WALL AND SAID HEAD IN SUPERPOSED ABUTTING RELATIONSHIP WITH SAID COLLAR AND SAID EXPANDER ELEMENT FORMING AN EXTERNAL BULGE IN SAID TUBULAR BODY ELEMENT, SAID EXTERNAL BULGE ENGAGING THE LOWER SURFACE OF THE LOWER SUPPORT AND SAID RESTRICTED END IN CIRCUMSCRIBED RELATIONSHIP WITH SAID CORE ELEMENT A PREDETERMINED DISTANCE FROM SAID NECK.