Improvement of a spark chamber filter device of a circuit breaker and method for producing such a spark chamber filter device

摘要

A filter apparatus (10) for a circuit breaker comprising: a filter housing (12) having at least two filter mounting zones for receiving at least two filter elements (18); andat least two filter elements (18) configured to fit into the filter mounting areas of the filter housing (12), each filter element (18) having a filter body (24) having a predetermined circumferential configuration and a filter seal (20) comprising is adapted to fit around a circumference of the filter body (24) to sealingly engage the filter body (24) in response to forces encountered in the filter device (10) during both assembly and operation Bringing filter housing (12), each of the filter bodies (24) having a peripheral portion (22) in the form of a recess for positioning, mounting and supporting a complementary edge portion of the filter seal (20); anda first perforated diffuser (36) having a circumferential configuration similar to the circumferential configuration of the filter bodies (24) and which fits into the filter housing (12) so that it is positioned over the filter elements (18); a spacer element (32) interposed therebetween the filter elements (18) and the first hole diffuser (36) is arranged; anda second hole diffuser (40) produced as a molded part with holes (42) which have a larger diameter than that of the first hole diffuser (36) and a spacer element (68) which is integrally formed in one piece on the second hole diffuser (40), the second porthole diffuser (40) comprises means for engaging and fitting into the filter housing (12) in tight overlying engagement with the first porthole diffuser (36).