专利名称：DRILL BIT发明人：Richard Paul Harris申请号：US13445880申请日：20120412
公开号：US20120263548A1公开日：20121018
专利附图：
摘要：A drill bit drills through porcelain and other hard tiles much more efficientlythan conventional drill bits. The porcelain and hard tile drill bit includes a four-point tipangle on the tip so the drill bit starts up correctly and does not run on initial startup ofdrilling. Through its step angle design and specially designed carbide tip, the drill bit
realizes a very fast drill rate and longer drill bit life. Conventional drill bits have no stepangle, only a rounded standard carbide tip with no four-point tip angle for easy start-up.The present drill bit solves the start-up problem and through the step angle, allows asharper and much longer drill life, permitting the drilling of many holes throughporcelain and hard tile.
申请人：Richard Paul Harris
地址：Levittown NY US
国籍：US
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