Patent ID: 8303679
Filing Date: 2012-11-06
Classification: B01D

Abstract:
1. A seal-tight filter closure system comprising: a connecting head having a connecting web; a connecting end at an end face of a filter housing, wherein said connecting head and said connecting end are matched to one another and wherein said connecting end is pushed onto said connecting head in a mounting direction into a mounted state on said connecting head, wherein said connecting end and said connecting head form a seal-tight connection in said mounted state; wherein said connecting end and said connecting web of said connecting head, which connecting web extends in the mounting direction, are provided with micro toothing; wherein said micro toothing, when pushing said connecting end onto said connecting head in said mounting direction, connects by positive locking action said connecting end and said connecting head with one another; and wherein an engagement of said micro toothing between said connecting end and said connecting head is realized along a flank of said connecting web and said connecting end, respectively, said flank extending in said mounting direction, wherein said micro toothing is a multi-row groove structure comprising projections and matching depressions, wherein said groove structure comprises several grooves that are arranged in rows substantially sequentially behind one another in said mounting direction and, transverse to said mounting direction, have a depth structure in a radial direction so that said several grooves of said micro toothing provide said engagement between said connecting end and said connecting head in said mounting direction along said flank, wherein said radial depth of said multi-row groove structure in said connecting head and connecting end decreases along said flank with increasing distance from said connecting head, said decreasing radial depth of said groove structure in said mounting direction operable to provide an increasing progressive course of mounting force as said connecting end and said connecting head progressively engage in said mounting direction into said mounted state, said decreasing radial depth of said groove structure in said mounting direction resulting a deepest projection engaging a deepest depression of said multi-row groove structure when in said mounted state.