Patent ID: 8511958
Filing Date: 2013-08-20
Classification: F16B

Abstract:
1. A screw with double notches comprising: a head portion, a shank portion extended outward from said head portion; said shank portion including a drilling portion formed at one end thereof, opposite to said head portion, a drilling tip disposed at a distal end of said drilling portion, and an axis defined along a center of said shank portion; wherein, at least a part of said shank portion is cross-sectionally divided into a raw section and a notched section disposed relatively to said raw section; said raw section being provided with cambered surface formed integrally said shank portion in cross-section, said notched section having two cutting notches each arcuately depressed into said shank portion along one said cambered surface at opposing sides of a protrudent part extending axially therebetween; said cutting notches being disposed near an end of said shank portion; and a threaded section spirally surrounded on said shank portion.