Patent ID: 6926466

Claim:
A device for lining a conduit to be rehabilitated, comprising a movable carriage having an axis, said carriage being adapted to enter and be displaced coaxially through the conduit, and a spray source rotatably mounted to said carriage for rotation about said axis, said spray source including a nozzle through which a fast setting lining mixture is forced out under pressure while said spray source is rotated about said axis and said carriage is axially displaced along the conduit, thereby providing for a uniform distribution of the lining mixture on an inner wall of the conduit, wherein at least first and second fluid passages arc provided for separately feeding first and second components of the fast setting lining mixture to the spray source where the first and second components are mixed together as the lining mixture is being applied, and wherein said spray source comprises a head carrying said nozzle, said head defining a mixing chamber far separately receiving the first and second components of the fast setting lining mixture, said mixing chamber having at least first and second inlet ports respectively connected in fluid flow communication with said first and second fluid passages, said nozzle being in fluid flow communication with said mixing chamber for receiving the lining mixture therefrom, and wherein said head is fitted on a pin for relative movement therealong between a first position in which the head is lowered onto said pin with the pin substantially filling the mixing chamber, thereby simultaneously blocking said first and second inlets, and a second position in which said pin is substantially withdrawn from said mixing chamber, thereby clearing said first and second inlets.