Patent ID: 8580007
Filing Date: 2013-11-12
Classification: B01D,G02B

Abstract:
1. 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) an insertion part including a filter housing for accommodating at least one filter element and further including a handle for inserting the insertion part into the insertion shaft, the filter housing being configured so as to cover the ventilation opening when the filter housing is in a working position within the insertion shaft; (b) an insertion means provided at a first end portion of the insertion shaft; (c) an insertion opening included in the insertion means and through which the insertion part is receivable into the insertion shaft in an insertion direction; and (d) wherein the insertion opening is stationary with respect to the enclosure, and the shape of the cross-section of the insertion opening in planes perpendicular to the insertion direction is configured such that the filter housing of the insertion part can be inserted into the insertion shaft in a predefined first rotational position, only, and wherein the filter housing can be rotated from the first rotational position into a second rotational position corresponding to a rotational orientation of the filter housing in the working position after the filter housing has been fully inserted through the insertion opening.