B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
B05B 13/06 (2006.01)
Patent
CA 2073880
The invention is a spray machine for spraying liquid coating material onto the interior surface of a pipeline. The spray machine is provided with a movable frame which can be rolled on attached wheel assemblies through the pipeline and positioned with its spray gun pointing toward the interior pipe surface. The frame serves as a base to which the other parts of the spray machine attach. The spray gun and an attached hollow gun rotating shaft continuously rotate axially within the pipeline. When the spray gun is properly positioned, the spray gun is mechanically turned on and off by a cable attached to a gun actuating arm which is pivotally mounted on a bracket attached to the gun rotating shaft. The gun actuating arm is provided with a cam follower which travels in a rotating path against a movable cam plate assembly. The cam plate assembly is attached to and moved rearward by pistons of air actuated cylinders. When the cam plate assembly moves rearward, it pushes against the cam follower, causing the gun actuating arm to pivot and exert tension on the cable, turning the spray gun on. When air is released from the air cylinders, tension is released on the cable, turning the spray gun off. Liquid coating material is supplied to the spray gun via a rotary fluid coupling. The rotary fluid coupling allows liquid coating material to flow through the coupling while one half of the coupling remains stationary with relationship to the frame and the other half rotates with the spray gun and the gun rotating shaft.
Commercial Resins Company
Gowling Lafleur Henderson Llp
LandOfFree
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