WEIGHT-GRIPPING VENTILATION FILTERING CARTRIDGE Russian patent published in 2015 - IPC E04F17/04 F24F13/00 

FIELD: construction.

SUBSTANCE: weight-gripping ventilation filtering cartridge comprises a body made of frost resistant polymer material designed for placement of a metal ventilation bushing inside, which is rigidly fixed in the channel of the ventilation shaft. In the upper part of the cartridge body there is a weight-gripping rim, having side through threaded holes. The weight-gripping rim is reinforced with a metal flange. In the lower part of the cartridge body there are metal galvanised pins in the form of grating. In the upper, middle and lower parts of the cartridge body there are three pairs of collars, between which there are metal hardened hoops fixed. The cartridge is equipped with a textile sling, four bolts with external thread, one long bolt with a nut at the end and a seamless metal galvanised ventilation bushing, made with a rim in the upper part for support against the ventilation shaft.

EFFECT: simplicity of a structure, possibility of quick replacement and multiple use of a cartridge, reliability of functioning, convenience of service, possibility to use in ventilation shafts that are newly built or in operation.

4 cl, 2 dwg