公开(公告)号：EP3408576B1

公开(公告)日：2020-09-09

申请号：EP17743541.9

申请日：2017-01-30

申请人： Fiberbuilt Manufacturing Inc.

发明人： HOOPER, Michael ,  FOONG, Weng Chee ,  FLETCHER, Dan

IPC分类号： F16L55/28 ,  B08B9/04 ,  F16L55/38 ,  F28G1/12

公开(公告)号：EP3408576A1

公开(公告)日：2018-12-05

申请号：EP17743541.9

申请日：2017-01-30

申请人： Fiberbuilt Manufacturing Inc.

发明人： HOOPER, Michael ,  FOONG, Weng Chee ,  FLETCHER, Dan

IPC分类号： F16L55/28 ,  B08B9/04 ,  F16L55/38 ,  F28G1/12

摘要： An annular seal for a conduit pig includes an annular diaphragm and a separate lead support structure. The annular diaphragm is devoid of internal supports and therefore quite flexible. However, the lead support structure supports the annular diaphragm such that a piston effect can be generated through the annular seal. A brush portion for a conduit pig may include forwardly raked bristles.