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1. 发明授权

US4934179A Pipe inspection method and device 失效
标题翻译：管道检查方法及装置
公开(公告)号：US4934179A
公开(公告)日：1990-06-19
申请号：US392196
申请日：1989-08-10
申请人： Bruce A. Biggerstaff
发明人： Bruce A. Biggerstaff
IPC分类号： G01B5/12 , G01B5/207
CPC分类号： G01B5/12 , G01B5/207
摘要： A method and device for inspecting the internal cross-sectional shape of pipes, and particularly of sewer pipes. A mandrel is inserted into the pipe. The mandrel may include an elastomeric member providing a fluid seal engaging the internal pipe surface. The mandrel also has a retrieval cord attached thereto and trailing therebehind. A plug member is provided behind the mandrel, which may be inflatably expanded to define a second fluid seal with the pipe. The space between the pipe and the two fluid seals is pressurized, such as with compressed air, causing the mandrel to advance along the pipe, pulling the retrieval cord as it advances. The mandrel's advancement will be stopped by a sufficiently large deformation. Thereafter, the mandrel is retrieved by pulling on the retrieval cord. In one specific embodiment of the device, a mandrel, including a flexible elastomeric member, is provided that is capable of ready modification to accommodate various diameter pipes. In addition, an elastomeric member is disclosed which is a single piece diaphragm for engagement with the mandrel.
摘要翻译：一种用于检查管道，特别是下水道管道的内部横截面形状的方法和装置。心轴插入管中。心轴可以包括提供接合内部管表面的流体密封件的弹性体构件。心轴还具有附接到其上的拾取绳索并且随之而来。插芯构件设置在心轴后面，其可以膨胀地膨胀以限定与管道的第二流体密封。管和两个流体密封件之间的空间例如用压缩空气加压，导致心轴沿着管道前进，当取出线前进时拉动取出线。心轴的前进将通过足够大的变形而停止。此后，通过拉动取出绳索取回心轴。在装置的一个具体实施例中，提供了包括柔性弹性体构件的心轴，其能够准备好改装以适应各种直径的管道。此外，公开了一种用于与心轴接合的单件隔膜的弹性构件。

2. 发明授权

US4866978A Pipe inspection method and device 失效
标题翻译：管道检查方法及装置
公开(公告)号：US4866978A
公开(公告)日：1989-09-19
申请号：US233249
申请日：1988-08-17
申请人： Bruce A. Biggerstaff
发明人： Bruce A. Biggerstaff
IPC分类号： G01B5/12 , G01B5/207
CPC分类号： G01B5/12 , G01B5/207
摘要： A method and device for inspecting the internal cross-sectional shape of pipes, and particularly of sewer pipes. A mandrel is inserted into the pipe. The mandrel may include an elastomeric member providing a fluid seal engaging the internal pipe surface. The mandrel also has a retrieval chord attached thereto and trailing therebehind. A plug member is provided behind the mandrel, which may be inflatably expanded to define a second fluid seal with the pipe. The space between the pipe and the two fluid seals is pressurized, such as with compressed air, causing the mandrel to advance along the pipe, pulling the retrieval chord as it advances. The mandrel's advancement will be stopped by a sufficiently large deformation. Thereafter, the mandrel is retrieved by pulling on the retrieval chord.
摘要翻译：一种用于检查管道，特别是下水道管道的内部横截面形状的方法和装置。心轴插入管中。心轴可以包括提供接合内部管表面的流体密封件的弹性体构件。心轴还具有连接到其上的检索弦并随之而来。插芯构件设置在心轴后面，其可以膨胀地膨胀以限定与管道的第二流体密封。管和两个流体密封件之间的空间例如用压缩空气加压，导致心轴沿着管道前进，当检索弦前进时拉动检索弦。心轴的前进将通过足够大的变形而停止。此后，通过拉动检索弦来取回心轴。

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