Abstract: An anhydrous ammonia fertilizer injector includes a tool bar frame with multiple knife injectors. Vapor pressure of the fertilizer forces liquid from a tank through hoses and a vapor separator to a pump. The pump increases pressure above the vapor pressure. Liquid fertilizer passes from the pump through a flow rate sensor, a servo controller and to a manifold. Discharge fittings on the manifold hold orifices. Discharge hoses convey fertilizer from each discharge fitting to each knife. A pressure transducer in each fitting downstream from the orifice sends current pressure readings to a monitor console. The console identifies the largest number of transducer pressures that have readings within a set pressure difference from each reading. The average of the maximum and minimum pressures identified is the center of an acceptable pressure band. A selected deviation sets band limits. The console displays discharge hoses with pressures outside the band limits.

Abstract: The vapor exhaust assembly, for anhydrous ammonia, includes a closed filter tower and a closed exhaust tower with vertical tubes. The filter tower is connected to the vapor tower by a vapor upper pipe and a liquid lower pipe. A filter tube is mounted in the filter tower. Ammonia enters the filter tower above an open end of the filter. Ammonia vapor moves from the filter tower through the vapor upper pipe to a vapor chamber in the vapor tower. Liquid moves from the filter tower through the liquid pipe to the vapor tower. Liquid received in the vapor tower is moved upward by a dam. Vapor in the liquid moves upward to the vapor chamber. Liquid moves downward from the dam top to a liquid discharge exit. A vapor discharge valve in the top of the vapor tower is opened to discharge vapor and increase liquid in both towers.

Abstract: A plastic discharge tube extends through a swaged cap bore through a metal swaged cap. A conical cap portion of the metal swaged cap is pressed into a retainer ring passage through a metal retainer ring. A swage surface in the retainer ring passage swages the conical portion of the metal swaged cap thereby fixing the position of the plastic discharge tube in the swaged cap bore and locking the swaged cap in the retainer ring passage. The plastic discharge tube is inserted into a steel injection tube fixed to a soil cutting knife. A ring bottom positioning surface contacts and injection tube upper end of the injection tube. A delivery hose is telescopically received on a plastic discharge tube retainer assembly and the steel injection tube. Hose clamps clamp the delivery hose to the retainer assembly and the injection tube.

Abstract: A method and apparatus for supplying liquid anhydrous ammonia to a pump or other flow control system whereby a separation chamber removes vapor generated by friction in the flow path from a storage tank containing saturated anhydrous ammonia. Additionally, liquid ammonia in the separation chamber creates a static head pressure. The difference in height between the inlet near the top of the separation chamber and the outlet at the bottom causes the static head pressure. The static head assures pure liquid at the bottom since absolute pressure exceeds saturation pressure. As a result, the feed stream to the pump or other flow control system is free of ammonia vapor.

Abstract: A method and apparatus for delivering agricultural fertilizer, such as anhydrous ammonia, uniformly into the soil includes an applicator frame on which a plurality of soil-cutting knives are suspended, a supply tank of the fertilizer, a heat exchanger for cooling the fertilizer to a predetermined temperature, with the coolant being delivered to the heat exchanger from an externally powered refrigeration unit, a distribution manifold for receiving the cooled fertilizer from the heat exchanger and a plurality of distribution hoses connecting the distributor individually to the knife blades and the emission nozzles associated therewith.

Abstract: The vapor exhaust assembly, for anhydrous ammonia, includes a closed filter tower and a closed exhaust tower with vertical tubes. The filter tower is connected to the vapor tower by a vapor upper pipe and a liquid lower pipe. A filter tube is mounted in the filter tower. Ammonia enters the filter tower above an open end of the filter. Ammonia vapor moves from the filter tower through the vapor upper pipe to a vapor chamber in the vapor tower. Liquid moves from the filter tower through the liquid pipe to the vapor tower. Liquid received in the vapor tower is moved upward by a dam. Vapor in the liquid moves upward to the vapor chamber. Liquid moves downward from the dam top to a liquid discharge exit. A vapor discharge valve in the top of the vapor tower is opened to discharge vapor and increase liquid in both towers.