Relief valve and a hose device for dust collectors, a dust collector and a method for operating a dust collector

A dust collector comprising:

• a cyclone;
• and
• a hose device comprising a hose device body having a first end configured to be attached to the cyclone and a second end with a free opening, the hose device body being flexible;
• a plurality of weights affixed to the hose device body;
• wherein, when subjected to suction forces from a vacuum of the cyclone, the second end of the hose device body is sucked upwards such that the plurality of weights hingedly swing toward the first end of the hose device body, against gravity forces acting upon the weights, and the hose device body is in a retracted configuration;
• wherein, when released from the suction forces of the cyclone, the plurality of weights hingedly swing away from the first end of the hose device body and the hose device body extends downwards into an extended configuration by the gravity forces acting upon the weights, in the absence of the suction forces, to expand a size of the free opening.