Patent ID: 6308483
Filing Date: 2001-10-30
Classification: E04D,Y10S

Abstract:
A roofing fastener assembly for securing a thermal insulation material to a roof deck, the assembly comprising:(a) a T-shaped fastener, comprising:(1) a fastener head having a planar face and an oppositely-directed, tapered face;(2) an elongated, tubular shank extending away from the tapered face and terminating in a free end, said shank having a bore extending through the fastener head and the fastener shank;(3) an annular shoulder extending inwardly from an inner surface of the bore near the free end of the shank; and(4) a retaining finger attached to the free end of the shank, said finger having a tip, and said finger extending downwardly and radially inwardly from the fastener shank toward the center of the bore;(b) a screw, comprising:(1) a screw head which engages the annular shoulder in the bore; and(2) a screw shaft of equal diameter along the length of the shaft and extending through the bore away from the fastener head, the screw shaft having threads against which the tip of the retaining finger continuously seats, thereby retaining the screw in a predetermined position relative to the shank; and(c) an annular washer having a central aperture surrounding the shank, the washer comprising:(1) a concave major surface engaging the tapered face;(2) a convex major surface having a plurality of outwardly-projecting barbs;(3) a plurality of notches extending radially outwardly from the central aperture; and(4) a rim extending outwardly from the convex major surface in a surrounding engagement with the fastener head and resisting lateral movement of the fastener head relative to the washer.