| 摘要 |
A machine for installing flexible pipe underground for use in lawn sprinkling systems and the like, said machine consisting of carriage powered for movement over the ground surface, a generally vertical blade mounted on the carriage and adapted to project into the ground, a digging "mole" carried at the lower end of the blade and having a forwardly projecting spade point, mechanism mounted on the carriage and powered to impart to the blade and mole an orbital motion in a vertical plane aligned with the direction of movement of the carriage, whereby said mole digs a tunnel in the ground, a connector for joining a pipe to the rearward end of the mole, whereby the pipe is pulled into the tunnel, and apparatus for ejecting water from the mole, whereby the digging action of the mole is facilitated and the passage of the pipe through the tunnel is lubricated. The machine may also be used for the subterranean installation of flexible cables or other conduits.
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