A pipe internal towing carriage comprises friction rollers intended for engagement with the internal periphery of the pipe, the friction rollers being mounted successively on a drive shaft such that their axes of rotation are mutually parallel and intersect the axis of rotation of the shaft. The shaft has a stepped configuration, each of the steps carrying one of the rollers, the steps being axially offset relative to each other lengthwise of the shaft.
申请公布号
US4457236(A)
申请公布日期
1984.07.03
申请号
US19820347120
申请日期
1982.02.09
申请人
AKHMADIEV, GALIMZYAN M.;BUVAILO, ILYA A.;MORGUN, VASILY M.;MUTIN, FELIX I.;YASTREBOV, PETR I.
发明人
AKHMADIEV, GALIMZYAN M.;BUVAILO, ILYA A.;MORGUN, VASILY M.;MUTIN, FELIX I.;YASTREBOV, PETR I.