NOISE KILLER Russian patent published in 2014 - IPC F01N1/10 F16L55/33 F04C29/06 

FIELD: machine building.

SUBSTANCE: proposed device comprises conical barrel with thread of porous material fitted with its bottom upward and inner hollow cylindrical guide with thrust and bores. Axes of said bores are perpendicular plugged at one end and provided with union at opposite end. It is equipped with piston displacing from the guide to thrust to overlap guides bores. Piston outer surface has thread for joint with the barrel, and inner and outer cylindrical sleeves with beads and spring arranged between beads of said sleeves. Said sleeves are arranged around guide. Outer sleeve is connected with the piston while outer sleeve and guide has the thread to displace inner sleeve over the guide.

EFFECT: expanded operating performances.

1 dwg