| 摘要 |
<p>The cup for use on pipeline pigs, such as a caliper pig comprises a unitary cup of resilient material having a central axis and having a forward end and a rearward end. The cup has at the forward end an integral radially extending circumferential flange portion with an axial opening. The flange portion secures the cup on a pipeline pig. The cup has rearwardly of flange portio, an integral intermediate portion of frusto-conical configuration with an interior frusto-conical surfaces and an exterior frusto-conical surface. The interior and exterior frustro-conical surfaces of the intermediate portion diverge away from each other.</p> |
