Patent ID: 7007828

Claim:
A liquid delivery means intended for the delivery of liquid from a storage container having an outlet, the delivery means comprising: an adaptor to sealingly close the outlet, the adaptor supporting a housing, said housing having an inlet, an outlet and a cavity which accommodates a flexible diaphragm, the diaphragm at least partially defining a pumping chamber within the cavity to one side of the diaphragm, and a space within the cavity to the other side of the diaphragm, the space being vented to atmosphere, the inlet opens directly into the interior of the container and the pumping chamber and the outlet providing communication between pumping chamber and a delivery line, the inlet and the outlet each having a one way valve, wherein in use the housing is located such that the housing is below an intended lowermost level of liquid in the container and the outlet is located above the inlet; and the housing supporting a solenoid and an associated actuating element which is operatively connected to the diaphragm through said space, said actuator being caused to reciprocate as a result of sequential activation of the solenoid to cause flexing of the diaphragm in the pumping chamber to induce liquid flow from the inlet to the pumping chamber and from the pumping chamber to the outlet of the housing, a control means located remote from the container and for controlling the solenoid.