AIR FILTER Russian patent published in 1994 - IPC

FIELD: air purifying . SUBSTANCE: device has a cylindrical body with a swirler having the form of a tangential duct; an elastic filtering member having the form of rigid rings laterally secured to the filtering member and positioned one under another. The rigid rings are allowed to be diminished in diameters downward in the conical part of the filtering member so that each underlying ring being capable of passing through the overlying one. The device further has a duct with a flap-valve connected to the dust catching bin; a duct for the purified gas removal provided with a rod diametrically attached in it, the duct being axially secured above the filtering member. The device further has a conical valve removably suspended on a flexible suspension member under the duct and in an axial alignment with it. Conical valve is connected to the lower end of the filtering member by a flexible link. EFFECT: enhanced efficiency of purification. 2 dwg