Abstract: A self-contained, portable liquid chemical supply tank storage and transfer unit includes an external support shell having upper and lower support shell sections concentrically joined to one another. The upper support shell section includes diametrically opposed upright arms which define therebetween a generally U-shaped space in which the transfer system is positioned. The lower support shell section houses a liquid chemical storage tank. The transfer system includes a metering canister fluid-connected to the liquid chemical within the storage tank, a selector valve assembly and a pump (preferably a manually-actuated hand pump). Operation of the pump will allow liquid chemical to be drawn from the storage tank and into the canister. The liquid chemical in the metering canister may then be transferred (e.g., via gravity or another pump) to another tank, for example, a mixing tank associated with an agricultural spray implement.

Abstract: A self-contained, portable, closed, chemical transfer system is described. The system includes a support frame, a container, a vacuum pump, a leveling means for the container, a valved inlet line, and a valved outlet line. The leveling means allows for use of the portable, self-contained system on various surface levels. The vacuum pump can provide solely a vacuum to the container of the system or can be structured to also provide pressure to the container of the system to facilitate emptying of the container. When a pressure means is not provided, gravity is utilized to facilitate emptying of the container. The vacuum pump of the invention which provides alternatively for both vacuum and pressure includes a single operating lever operatively connected to two 3-way valves which are used in conjunction with a motor, air pump, and appropriate air lines. The system is operated through the use of a minimal number of valves which provides for simple construction and operation.