ROTARY-STRIKING DRILLING CROWN Russian patent published in 2005 - IPC

Abstract RU 2252998 C2

FIELD: mining industry.

SUBSTANCE: device has body with blow channels, four feathers, armored by hard-alloy inserts, core hollow in central portion and grooves in end portion for removing destruction products. Hard-alloy inserts are made tungsten-cobalt and have diameter equal to (0.25-0.35)D, and height of feathers with armored hard-alloy inserts is (0.5-0.5)D, where D - crown diameter.

EFFECT: higher reliability, increased wear durability of crown body and limit energy of single strike.

2 dwg

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RU 2 252 998 C2

Authors

Klimov B.G.

Khadonov A.V.

Dates

2005-05-27—Published

2002-09-30—Filed