Mechanism for delivering highly viscous materials for coating an interior surface of a tubular substrate

A material delivery assembly comprising:

• a delivery fitting attached to a fitting end of a drive shaft, the delivery fitting comprising:
• an outer wall that extends perpendicularly from a receiving surface;
• wherein the receiving surface includes a plurality of receiving slots that radiate outward from a central region of the receiving surface to the outer wall;
• a plurality of apportioning slots defined within the outer wall;
• and
• a dispersion chamber defined within the outer wall and the receiving surface;
• a material delivery conduit that extends to a delivery port located within the dispersion chamber and proximate the receiving surface of the delivery fitting, wherein
• the delivery port is configured to selectively deliver a viscous material to the receiving surface;
• the drive shaft and the delivery fitting selectively and rotationally operate to define an apportioning state of the delivery fitting relative to the delivery port that is configured to manipulate the viscous material toward an inner surface of the outer wall;
• and
• the plurality of apportioning slots in the apportioning state are configured to regulate passage of the viscous material from the dispersion chamber, through the outer wall and into a disk-shaped spread pattern.