Apparatus for applying a coating to a roof or other substrate

An apparatus for spray coating a surface, comprising:

• a frame having one or more wheels, wherein the frame is adapted to be moved in relation to the surface;
• a spray assembly operatively connected to the frame, wherein the spray assembly includes a carriage that moves back and forth along a travel path when activated by a drive mechanism of the spray assembly, wherein the carriage comprises a support assembly holding a spray device at a predetermined position adapted for applying a coating on the surface, wherein the carriage is operatively connected to the drive mechanism by a carriage driving assembly including a connecting member having a first end pivotally connected to a portion of the drive mechanism and a second end pivotally connected to a portion of the carriage wherein the connecting member first end is offset from the connecting member second end, wherein the drive mechanism includes a drive motor which moves a drive member along a drive path.

An apparatus for applying a coating to a substrate, comprising:

• a frame adapted to be moved in relation to the substrate;
• and
• a spray assembly connected to the frame, such that a coating outlet nozzle of a spray gun of the spray assembly is adapted to be located at a distance of about 6 to about 60 inches from the substrate, wherein the spray assembly comprises a carriage and a drive mechanism that reciprocates the carriage along a linear travel path, wherein the spray assembly is free of a limit switch at an end of the travel path, wherein the drive mechanism includes an attachment member connected to a belt or chain that travels around axles spaced at a predetermined distance when activated by a drive motor, and wherein the carriage is operatively connected to the attachment member by a rotatable connecting member that provides a change of direction at the ends of the travel path.