发明授权
US5571977A Process and device for inspecting and/or servicing and repairing subsidiary canals branching off from a main drain 失效
用于检查和/或维修和修理从主排水管分支的辅助通道的过程和设备

Process and device for inspecting and/or servicing and repairing
subsidiary canals branching off from a main drain
摘要:
A process is disclosed for inspecting subsidiary canals that branch off from a main drain. A camera probe (24) is deflected from the main drain pipe (10) into the branching off subsidiary, canal pipe (12) by means of a deflecting frame (22; 76; 96). The process is characterized by a propulsion by reaction of the camera probe (24), a fluid under pressure being supplied to reaction jets (34; 90) mounted on the camera probe so as to drive the latter into the subsidiary canal pipe (12).
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