Abstract: Apparatus for pneumatically conveying liquid waste material from a toilet or other receptacle to a receiving tank. A surge tank is located between the toilet and the receiving tank, and a vacuum pump is utilized to create a pressure drop in the surge tank sufficient only to the extent necessary to transfer the liquid waste material from the toilet to the surge tank, a ball float serves to close communication between the surge tank and the receiving tank when a partial vacuum exists in the surge tank. After a preselected time period has elapsed, the surge tank is vented to atmosphere to allow the ball float to move to an open position to discharge the liquid waste material from the surge tank to the receiving tank. Normally, ball float is the only movable element exposed to contact by the liquid waste material during the flush operation, and is a sphere that is self-cleaning in operation.

Abstract: A water closet assembly adapted to be mounted on any one of a variety of bases for discharge of waste material into a drainage system, a holding tank, or the like, and which includes features for making optimum use of the flush water. The assembly includes a bowl and a pivotally mounted pan for closing the discharge outlet of the bowl and shaped so that it can provide a water seal when the pan is in its closed position. The pan can be tilted to an open position to discharge the contents of the bowl, and the actuator mechanism for tilting the bowl is operable to open a valve so that flush water will flow into the bowl in timed relation to movement of the pan. The bowl and pan are shaped to make most effective use of the flush water and to provide a desired water spot in the bowl, and an accumulation chamber is provided to measure a desired quantity of water for refilling the pan after a flushing operation.