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Motion controller for wastewater treatment trickling filter

Image Number 3 for United States Patent #5190644.

An apparatus for controlling the rate of rotation of a wastewater distribution assembly for a sewage treatment trickling filter contained by a vessel. The wastewater distribution assembly is of the type including a support and at least one distribution arm having an end terminating adjacent a wall of the vessel. The apparatus comprises a carriage having at least one wheel rotatably mounted to the end of the distribution arm and adapted to engage the vessel and means mounted to the carriage for controlling the rotation rate or free-wheeling of the wheel.

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