DRILLING TOOL FOR ROTARY AND/OR PERCUSSION PROCESSING MACHINES Russian patent published in 2014 - IPC B23B51/02 B28D1/14 

FIELD: process engineering.

SUBSTANCE: invention relates to drill tools and can be used at rotary and/or percussion machines designed to bore brickwork, concrete, stone and similar materials. This tool has head and at least one cutting element arranged at its free end. Said cutting tool extends beyond said head, its point extending along radial direction beyond drilling tool and having at least two bits with cutting edges. Said bits extend radially outward from the point while cutting edges if seen in direction of drill tool lengthwise axis between the point and peripheral surfaces connecting the lateral surfaces, at least one arc-like section to brake drilling dust radially outward motion. Said section starts at the point whereat bit point vertex angle abruptly decreases.

EFFECT: higher loading capacity, longer life.

14 cl, 8 dwg