公开(公告)号：EP2760597A4

公开(公告)日：2015-05-13

申请号：EP12836891

申请日：2012-08-30

申请人： DOIG IAN DRACUP

发明人： DOIG IAN DRACUP

IPC分类号： B08B9/055 ,  F16L55/128 ,  F16L55/38 ,  F16L55/44

CPC分类号： B08B9/055 ,  B08B9/0553 ,  F16L55/1283 ,  F16L55/38 ,  F16L55/44

摘要： Pigs (10) are propelled forwards by a propulsion fluid in a pipeline (21). The pigs (10) have an upstream end (13), a downstream end (11), and an intermediate section (12). The intermediate section has a variable geometry chamber (16) associated therewith and one or more outwardly extending external pawl teeth (15). The pawl teeth are automatically displaceable outwardly relative to a longitudinal axis (9) in response to a pressure differential between a downstream pressure and an upstream pressure. The pig is configured such that a change in a geometry of the chamber in response to the pressure differential between the downstream pressure and the upstream pressure causes the one or more pawl teeth to automatically displace outwardly when the upstream pressure is less than the downstream pressure. When the pawl teeth are deployed, upstream displacement of the pig is inhibited. Various related systems (5) and methods are also disclosed.

公开(公告)号：EP1872036A4

公开(公告)日：2010-10-20

申请号：EP06721364

申请日：2006-04-11

申请人： DOIG IAN DRACUP

发明人： DOIG IAN DRACUP

IPC分类号： F16K7/07 ,  E03F5/22 ,  F04B43/12 ,  F04B43/14 ,  F16K7/04 ,  F16K15/14 ,  F16K15/16 ,  F16K15/18 ,  F16K17/02 ,  F16K17/10

CPC分类号： F04B43/12 ,  F04B43/021 ,  F04B43/14 ,  F16K7/07 ,  Y10T137/3109 ,  Y10T137/7882 ,  Y10T137/7886 ,  Y10T137/7889 ,  Y10T137/87829

公开(公告)号：EP2285467A4

公开(公告)日：2011-11-23

申请号：EP09729358

申请日：2009-04-02

申请人： DOIG IAN DRACUP

发明人： DOIG IAN DRACUP

IPC分类号： B01D35/10 ,  B01D29/68

CPC分类号： B01D29/66 ,  B01D29/114 ,  B01D29/52 ,  B01D29/682 ,  B01D35/10

摘要： A filtration barrier comprises first elements that are fibers, strips, or bristles wherein apertures between elements provide passages for a fluid transporting granules to the filtration barrier, and wherein the elements (11) are supported against deflection by second elements (12) when the fluid is flowing in a forwards direction whereby granules are prevented from accompanying the fluid through said passages by the barrier, but whereby the second elements do not support the first elements against deflection when the fluid flows in a (back-wash) direction opposite the forwards direction, when the elements (11a, 11b, 11c) become deflected by the fluid to increase the size of the apertures. In various embodiments of the invention the elements are supported at one end or both ends, and elements are arranged to deflect differently to further increase the apertures between neighboring elements as shown below.