초록 ▼

The drywall screw includes an elongated shaft about an axis, a screw head at one end and threads about the shaft. The screw head has a recess having upper and lower portions. The upper portion is comprised of an upwardly flared thin-walled section having convex and concave interior and exterior surf

The drywall screw includes an elongated shaft about an axis, a screw head at one end and threads about the shaft. The screw head has a recess having upper and lower portions. The upper portion is comprised of an upwardly flared thin-walled section having convex and concave interior and exterior surfaces, respectively. The lower portion includes a Phillips head slot for receiving a Phillips head driver. The recess in the head of the drywall screw and the outwardly flared head enables the screw to be driven into the drywall without tearing or loosening the paper overlying the drywall, while simultaneously providing a sufficient recess for receiving the drywall mud finishing compound. In a further form of drywall screw, the upper portion of the screw head is formed by a thin-walled portion defining a conical surface of revolution about the axis of the screw.

대표청구항 ▼

[ What is claimed is:] [1.] A screw for securing drywall to a support, the drywall having an outer paper surface and an interior composition, comprising:a screw body having an elongated shaft about an axis, a screw head at one end of the shaft and threads about said shaft;said head including a reces

[ What is claimed is:] [1.] A screw for securing drywall to a support, the drywall having an outer paper surface and an interior composition, comprising:a screw body having an elongated shaft about an axis, a screw head at one end of the shaft and threads about said shaft;said head including a recess and having upper and lower portions, said upper portion being defined by a wall of said screw head symmetrical about said axis, said lower portion forming at least one slot for receiving a tool head for driving the screw;said slot terminating at an upper end in a base extending in a plane generally normal to the axis and forming a lower end of said upper portion;said wall having a convex arcuate interior surface and an exterior surface;the upper portion of said head having a width greater than a width of the screw threads about the shaft for engaging and overlying the paper surface of the drywall;said wall adjoining said shaft at an axial location along the head corresponding to the axial location of the base, the diameter of the base within said wall corresponding substantially to the diameter of the shaft less twice the thickness of said wall at the juncture of said wall and said shaft.