Machine for treating pipe interiors

Claim 1

A machine for providing first and second treatments to the interior surface of a length of pipe and comprising: a carriage movable longitudinally through said pipe, a support structure mounted on the carriage, a tubular shaft having opposite ends, mounting means securing the tubular shaft to the support structure for rotation about the longitudinal axis of said shaft and with said axis substantially aligned with the corresponding axis of the pipe, a first plurality of material-conveying tubular arms radially disposed with respect to the tubular shaft and having outer ends near the interior surface and having inner ends, securing means attaching the inner ends of the tubular arms to one end of the tubular shaft, a supply hose connectable at one end thereof to a source of pressure-driven fluid material, a removable deflector member mounted in the securing means opposite the tubular shaft and adapted to deflect the fluid material flowing through the tubular shaft into the first tubular arms, an inner tube extending longitudinally of the tubular shaft and having opposite ends, a support member insertable into the securing means as a replacement for the deflector member and having a central opening through which a portion of the inner tube projects, a second plurality of material-conveying tubular arms radially disposed with respect to the inner tube and having outer ends near the interior surface and inner ends, a fitting securing the inner ends of the second plurality of material-conveying tubular arms to a projecting end of the inner tube, coupling means non-rotatably securing an opposite end of the supply hose to the mounting means in communication with one of the tubular shaft and the inner tube, and drive means on the support structure for rotating the tubular shaft and the tubular arms whereby the fluid material discharging from the outer ends is applied to the interior surface as the carriage moves through the pipe.