Nail type fasteners

Claim 1

THE CONSTRUCTION COMPRISING AN IMPERFORATE AND SUBSTANTIALLY PLANAR RELATIVELY SOFT BUILDING MATERIAL OF PREDETERMINED SUBSTANTIALLY UNIFORM THICKNESS SUCH AS PLASTERBOARD AND THE LIKE; A BACKING MEMBER SUCH AS WOOD ADAPTED TO RECEIVE AND RETAIN A NAIL; AND A PRE-ASSEMBLED NAIL-TYPE FASTENER COMPRISING A DRIVE NAIL HAVING A SHANK EXTENDING THROUGH THE PREDETERMINED SUBSTANTIALLY UNIFORM THICKNESS OF SAID RELATIVELY SOFT MATERIAL AND RECEIVED IN SAID BACKING MEMBER, SAID SHANK HAVING A PIERCING DRIVING END IN SAID BACKING MEMBER, SAID NAIL HAVING AN ENLARGED HEAD AT THE END OPPOSITE SAID PIERCING DRIVING END AND SUBSTANTIALLY FLUSH WITH THE SURFACE OF SAID RELATIVELY SOFT MATERIAL OPPOSITE SAID BACKING MEMBER, SAID HEAD BEING OF SUBSTANTIALLY GREATER DIAMETER THAN SAID SHANK AND A RETAINER ON SAID SHANK COMPRISING A SLEEVE BODY OF A DIAMETER LESS THAN THE DIAMETER OF SAID HEAD TELESCOPICALLY ASSOCIATED WITH A PORTION OF THE SHANK ADJACENT THE HEAD AND AFFIXED THERETO TO PREVENT LONGITUDINAL MOVEMENT OF THE RETAINER RELATIVE TO THE NAIL WITH ONE END OF THE SLEEVE BODY DISPOSED ADJACENT THE HEAD AND WITH THE REMOTE END THEREOF EXTENDING INTO THE BUILDING MATERIAL A DISTANCE WHICH IS A SUBSTANTIAL PROPORTION OF THE SID PREDETERMINED SUBSTANTIALLY UNIFORM THICKNESS OF THE BUILDING MATERIAL, AND A PLURALITY OF PRONGS DISPOSED SYMMETRICALLY ABOUT THE SAID REMOTE END OF THE SLEEVE BODY EXTENDING DIAGONALLY OUTWARDLY THEREFROM ENTIRELY WITHIN THE RELATIVE SOFT MATERIAL AND TOWARD THE PIERCING DRIVING END OF THE NAIL FOR TRAPPING THE RELATIVELY SOFT MATERIAL BETWEEN THE HEAD AND THE PRONGS AND ALONG THE INTERMEDIATE SURFACE OF THE SLEEVE BODY.