Patent ID: 7776122

Claim:
A filter system for cleaning the air of an enclosure to be ventilated, the enclosure including a ventilation opening and being associated with an insertion shaft located proximate to the ventilation opening, the filter system including: (a) a filter housing for accommodating at least one filter element, the filter housing being configured so as to cover the ventilation opening when the filter housing is in an end position; (b) a thrust element for exerting a thrust upon the filter housing in a first direction to displace the filter housing in the first direction through an opening of the insertion shaft and along the insertion shaft to an initial inserted position along the insertion shaft, and for exerting an additional thrust upon the filter housing in the first direction after the filter housing has reached the initial inserted position; (c) at least one guide element located at a back portion of the insertion shaft spaced apart from the opening of the insertion shaft, the at least one guide element for contacting a leading edge of the filter housing after the filter housing has been inserted to the initial inserted position so that such contact displaces the filter housing to the end position in response to the additional thrust exerted upon the filter housing by the thrust element, the displacement to the end position including a displacement of at least a portion of the filter housing in a second direction extending perpendicular to the first direction; and (d) an adjusting bar pivotally connected at a first end to the thrust element and pivotally connected at an opposite end to the filter housing.