Abstract: A tank for use with a portable sprayer. The tank is made of plastic and is elliptical in shape to provide increased strength for the tank when pressurized. The elliptical configuration also makes less visible the harmless distortions which tend to occur in plastic tanks when pressurized.

Abstract: A manual pump for pressurizing a closed tank. The pump has a unitary handle, piston rod, valve seat, and split disc air release. An "O" ring is positioned between the valve seat and the split disc air release. A pump cylinder is disposed in the top of the tank and the unitary member is in the cylinder with the handle extending above the top. A piston rod sleeve closes the top of the pump cylinder and provides a stabilizing guide surface for the piston rod as it is moved in and out in the pump cylinder. On the compression stroke of the piston rod, the resilient "O" ring contacts the valve seat sealing the pump cylinder. On the return stroke, the "O" ring contacts the split disc and allows air to enter the pump cylinder through the split disc. An improved garden-type or utility sprayer is also disclosed incorporating the pump into a portable tank adapted to contain a liquid to be dispensed.

Abstract: A portable sprayer which has a resealable closure, a dispensing valve and a pressure-responsive filling valve attached to a receptacle. As the receptacle is filled with fluid through the valve, air which is entrapped in the receptacle pressurizes the container to facilitate dispensing the fluid. During filling, the inlet valve closes if the pressure of the liquid source to which the sprayer is connected exceeds that within the container by a predetermined amount. The inlet valve also closes when the filling hose is disconnected from the container in order to close the container.

Abstract: A portable sprayer which has a resealable closure, a dispensing valve and a quick disconnect one-way valve attached to a receptacle. As the receptacle is filled with fluid through the one-way valve, air which is entrapped in the receptacle pressurizes the container to facilitate dispensing the fluid. By locking the dispensing valve open or by opening the top closure of the sprayer, and securing a hose to the quick disconnect one-way valve, one can flush the sprayer out by allowing fresh water to flow continually through the system.

Abstract: A portable sprayer which has a resealable lid and a one-way valve attached to a receptacle. As the receptacle is filled with fluid through the one-way valve, air which is entrapped in the receptacle pressurizes the container to facilitate dispensing the fluid.