Abstract: An air eliminator for liquid handling systems comprises a cylindrical container having a liquid inlet and a liquid outlet which are separated from one another by a cylindrical porous barrier positioned to subdivide the interior of the container into first and second chambers. The cylindrical barrier comprises a porous membrane which permits liquid to flow from the first chamber to the second chamber while preventing the passage therethrough of any gases which are entrained in incoming liquid supplied to the first chamber. Any such entrained gases accumulate in an air space located in the first chamber and are vented from the first chamber at atmospheric pressure. Liquid passing through the membrane, free of entrained gases, accumulates in the second chamber within the cylindrical barrier, and then passes to the liquid outlet via a modulating valve in the second chamber.

Abstract: A liquid metering device comprises a sealed housing which defines a reserve chamber adjacent the bottom of the housing, and a measuring chamber within the housing above the reserve chamber. The measuring chamber has a pair of liquid-level sensors therein in spaced vertical relation to one another which cooperate with a control mechanism to feed liquid to be measured into the measuring chamber when the liquid level in the measuring chamber is adjacent the lower sensor, and to terminate the feeding of liquid into the measuring chamber while substantially simultaneously dumping liquid from the measuring chamber into the reserve chamber when the level of liquid in the measuring chamber rises to the level of the upper sensor.

Abstract: An automatic, temperature-compensated liquid or fuel metering device comprises a measuring chamber having a pair of magnetically responsive vertically spaced reed switches therein which are selectively actuated by a magnetcarrying float to control valves associated with the chamber to supply a predetermined increment of liquid to the chamber and thereafter to drain that increment from the chamber into a reservoir. The volume of each increment is dependent upon the spacing between the reed switches, and that spacing is controlled by a bellows having a sample of the liquid being measured sealed therein, the bellows being disposed in the path of flow of liquid to the chamber and being operative to vary the volume of said increments with variations in the temperature of the liquid being measured.