专利名称：Pipeline pig
发明人：BRUNS, VOLKER,RUEDIGER, FRANK申请号：EP97113189.1申请日：19970731公开号：EP0823293A2公开日：19980211
专利附图：
摘要：The mole has a convex front (2) and rear (4) ends, and through holes (21, 21')fitted with non-return valves (30, 30'), two peripheral sealing edges (8), separated by awaisted section (6) and passages between the ends and the space between the waistedsection and the pipe bore. To effect a transfer, a pressurised fluid (T1) may be used to
propel the mole and, ahead of it, the matter (M), some fluid can pass through thepassages to prevent matter packing against the front of the mole. Reverse fluidpressure, applied to return the mole, can close the non-return valves.
申请人：I.S.T. MOLCHTECHNIK GMBH
地址：Albert-Schweitzer-Ring 23 20355 Hamburg DE
国籍：DE
代理机构：Eisenführ, Speiser & Partner
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