Patent ID: 6099611
Filing Date: 2000-08-08
Classification: F04D,H02B,H05K

Abstract:
In a filter ventilator having a center axis wherein the filter ventilator is engaged in an opening located in a fastening plate, the opening having a cross section, and the engagement occurring in such a manner that a housing part having an outer cross section that corresponds to the cross section of the opening includes a stop flange that limits insertion of a filter on the fastening plate and lock elements arranged on the outside of the housing part so as to project beyond the outer cross section of the housing part and deflect in the direction of the center axis of the filter ventilator during the insertion of the filter ventilator into the opening and engage behind the fastening plate following insertion of the filter ventilator to hold the filter ventilator securely in the opening, the filter ventilator further comprising:resilient lock elements each having a free end and being attached to the housing part such that the free end is oriented toward a support surface on the rear side of the stop flange;the ends of the lock elements include a plurality of lock stages oriented in a stepped arrangement so as to form a locating section substantially perpendicular to the support surface and a lock section that is substantially parallel to the support surface where the lock sections include spaces of equal width and the locating sections are sized for varying thicknesses of fastening plates; andthe housing part attached to the lock elements is spaced from the center axis of the filter ventilator by a first distance that is no greater than the distance the lock stage nearest the support surface is spaced from the center axis.