A pipe threading arrangement for connection to a service pipe (14) in a dwelling comprises a launch coupling (50) with a body portion (51) forming a chamber in which a parachute housing (60) is held. A stopper arrangement (30, 31) allows the coupling to be attached to the service pipe (14) whilst gas is present in both the service pipe and main. The housing includes a folded parachute-like device (62) attached to a line (66). A front portion of the parachute housing includes flexible guide (63) which allows the device to be manually lowered into a main pipe via the service pipe. A tube (65) is used to push the housing through the pipe. The tube is arranged to receive a jet of gas to separate the end with the guide attached and to inflate the parachute into the main where gas flow carries it along the main.
申请公布号
WO0180391(A1)
申请公布日期
2001.10.25
申请号
WO2001GB01595
申请日期
2001.04.09
申请人
LATTICE INTELLECTUAL PROPERTY LTD;DELFORCE, STEPHEN, ROBERT;WAGHORN, CHRISTOPHER, PAUL;ROWE, STEPHEN, ANTHONY
发明人
DELFORCE, STEPHEN, ROBERT;WAGHORN, CHRISTOPHER, PAUL;ROWE, STEPHEN, ANTHONY