专利名称：Pipeline pig发明人：Bennie D. Cato申请号：US05/365156申请日：19730530公开号：US04069535A公开日：19780124
摘要：The specification discloses a pipeline pig comprising an elongated cylindricalmember having a front end and a rear end; a plurality of spaced annular flexible ringscircumscribing the member and extending radially outward from the member forcontacting the inside wall of the pipeline; and an elongated central aperture extendingfrom the rear end of the member to a point beyond its midpoint and near the front endthereof for receiving fluid pressure to facilitate movement of the pig through a pipeline.
申请人：CATO; BENNIE D.
代理机构：Wofford, Felsman, Fails & Zobal
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