Patent ID: 9695860
Date: 2017-07-04
CPC Classifications: F16B

Claim:
1. A wood deck screw comprising: a head defining a socket and having an underside and comprising an array of angularly spaced compression lobes protruding at the underside and having a chamfered lower extremity, the lobes extending non-radially from an inboard position to a well-defined trailing outboard peripheral edge, the lobes having an array of flutes formed between them; a neck extending from said head and symmetrically tapering about a central longitudinal axis; and a shank integrally transitioning from said neck and terminating in a half-point tip, said shank having, from a proximal end to a distal end, a first right-hand threaded portion having a first thread density and first major diameter, a second right-hand threaded portion having a second thread density and a second major diameter and an intermediate unthreaded portion between said first and second threaded portions, the first thread density being greater than the second thread density and the first major diameter being less than the second major diameter.