Patent ID: 9377045
Filing Date: 2016-06-28
CPC Classification: F16B

Claim Text:
1. A wood screw comprising: a head including a top surface and a bottom surface extending downwards from said top surface; a shank extending downwards from said bottom surface and having a plurality of threads spirally disposed thereon; and a drilling portion disposed at one end of said shank, opposite to said head; wherein said head includes a plurality of spaced apart cutting areas disposed on said bottom surface, a smooth area being formed between any two adjacent cutting areas and forming a conical shape on said bottom surface, each of the plurality of said cutting areas having at least two radially extending grooves, each of said at least two grooves having a base formed separate from said conical shape formed by said smooth conical areas, two rib walls protruding from each of said bases, each base of each cutting area protruding from said shape formed by said smooth conical areas, said rib walls of two adjacent grooves meeting to form a first cutting edge, each of the plurality of said cutting areas having two outer walls, each of said two outer walls being adjacent to and protruding from said smooth conical area, each of said outer wall and one of said rib walls of each groove which is adjacent to each outer wall meeting to form a second cutting edge.