Pre-filter arrangements and valves for an industrial dust extractor

Abstract

A dust extractor comprising at least a first and a second valve arrangement and a pre-separator tank with a pre-filter system, wherein the pre-filter system comprises at least a first part and a second part, wherein each valve arrangement is configured to generate a reverse flow of air to clean an associated part of the pre-filter system, in response to actuation of a respective trigger device configured to place the valve arrangement in a pre-filter cleaning position, wherein the first valve arrangement is associated with cleaning of the first part of the pre-filter system and the second valve arrangement is associated with cleaning of the second part of the pre-filter system, wherein actuation of the trigger devices can be performed alternately wherein only one of the first and second valve arrangements is placed in its pre-filter cleaning position, or with time overlap wherein both the first and the second valve arrangements are placed in their respective pre-filter cleaning positions.

Dependencies are inferred from the claim text.