Anchor nail fastener with sealing means

Claim 1

AN ANCHOR NAIL FASTENER COMPRISING, IN COMBINATION: A TUBE HAVING UPPER AND LOWER ENDS TO BE DRIVEN LOWER END FIRST INTO A WORKPIECE WITH A RELATIVELY LARGE WASHER-LIKE HEAD SECURED TO THE UPPER END OF THE TUBE FOR LIMITING PENETRATION OF A WORKPIECE, SAID TUBE PROVIDED ADJACENT ITS LOWER END WITH A SIDE OPENING APERTURE, MEANS WITHIN THE TUBE ADJACENT THE APERTURE FOR DEFLECTING A NAIL DRIVEN DOWNWARDLY INTO THE TUBE LATERALLY OUTWARDLY THROUGH THE APERTURE, A NAIL HAVING A SHANK SIZED TO CLOSELY FIT THE BORE OF THE TUBE FOR DRIVING DOWNWARDLY THROUGH THE TUBE AND HAVING A LENGTH SUFFICENTLY GREATER THAN THE DISTACNE BETWEEN THE UPPER END OF THE TUBE AND SAID APERTURE WHEREBY WHEN THE NAIL IS FULLY DRIVEN INTO THE TUBE A PORTION OF THE NAIL WILL PROJECT LATERALLY FROM THE APERTURE TO ANCHOR THE NAIL AND TUBE IN THE WORKPIECE, A WATER-PROOF PLASTIC STRIPPABLY ADHERING TO THE SHANK OF THE NAIL, AND SAID TUBE BORE PROVIDED AT ITS UPPER END WITH A MOUTH HAVING AN ANNULAR CONSTRICTION THEREIN FOR WIPING THE SHANK OF THE NAIL AND STRIPPING SAID PLASTIC UPWARDLY ALONG THE SHANK TOWARD THE HEAD AS THE NAIL IS DRIVEN INTO THE TUBE TO CAUSE AN ACCUMULATION OF THE PLASTIC AT THE CONSTRICTION FORMING IN SITU A GASKET BETWEEN THE UPPER END OF THE TUBE AND THE UNDERSIDE OF THE HEAD OF THE NAIL WHEN THE NAIL IS FULLY DRIVEN INTO THE TUBE.