公开(公告)号：US20170122357A1

公开(公告)日：2017-05-04

申请号：US14927476

申请日：2015-10-30

申请人： WEN-LI HOU

发明人： WEN-LI HOU

IPC分类号： F16B25/10

CPC分类号： F16B25/0015 ,  F16B25/0084 ,  F16B25/106

摘要： A screw with a cutting surface at a tapered distal end thereof comprises a stem; a tapered end; a thread formed thereon; and a cutting surface cutting through the tapered end. A slope of the cutting surface with respect to an extending central axis of the stem is greater than or equal to a slope of an original surface of the tapered end with respect to the extending central axis of the stem. The cutting surface is a flat surface or a concave surface. A distal end of the cutting surface passes through or does not pass through or exactly at an extending central axis of the stem. When the tapered end drills an object, the cutting surface will cut the object rapidly, such as cements, stones, woods and the combination structures thereof. The object will not crack. The operation is easy and force-saved.