Abstract: Two rotating cups are mounted to a motor to rotate in opposite directions in an application head for depositing a liquid coating material on the interior surface of a vessel by remote control. Each rotating cup is constructed with internal baffles in the form of spirals, those of one cup spiraling in the direction opposite those of the other cup, and each spiral terminating in an opening at the cup periphery. The two rotating cups eject streams of the liquid coating material that are at angles to the radii of the cups and that rotate as the cups rotate, the streams from one cup striking the vessel surface from one side of the radius and those from the other cup striking the surface from the other side of the radius.

Abstract: Reactive fluids that react upon contact and are intended to be combined only at a site of application that is remote or not easily accessible are transported to the site by separate crescent internal gear pumps whose pump rates are governed by a control loop that uses individual mass flow rates and a common automatic controller. In preferred embodiments, a multi-lumen cable is used to convey the pump outputs individually to the application site, and an application head at the distal end of the cable both combines the individual flows and dispenses them to the site. The invention is useful for a variety of reactive systems and applications, but particularly for applying two-component epoxy linings to underground pipes.