| 摘要 |
PCT No. PCT/AU87/00206 Sec. 371 Date Mar. 11, 1988 Sec. 102(e) Date Mar. 11, 1988 PCT Filed Jul. 8, 1987 PCT Pub. No. WO88/00496 PCT Pub. Date Jan. 28, 1988.A gas filter is disclosed including a clean gas section and a dusty gas section separated by a porting plate which includes concentric rings of ports providing gas communication between the two sections. The ports have connected thereto respective filter media sleeves for collecting contamination held in suspension in the gas being filtered. In order to clean the filter sleeves there is provided a back flushing gas pulse generator which is connected directly to a housing body of the filter apparatus. The gas pulse generator includes a release valve in direct communication with a hollow rotatable shaft which leads to a gas pulse distributor having arms which sweep across the clean gas section side of the porting plate. The arms of the gas pulse distributor includes apertures aligned with the respective ports of the porting plate so as to inject into the filter media sleeves a pulse of clean gas in a reversed direction so as to shake out any contaminants that have been collected in the sleeves.
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