Patent ID: 8876488

Claim:
Apparatus comprising: a fluid chamber arranged between a container of fluid and a pump for providing the fluid to another device, the fluid chamber responds to a pressure from the pump and provides the fluid from the container through the fluid chamber to the pump and said another device, and the fluid chamber also includes an arrangement that responds to a vacuum pressure created in the fluid chamber when the container of fluid is substantially empty and provides a fluid chamber force by moving the arrangement so as to cause the pump to turn off; and a gas chamber arranged between a gas supply and the pump, having a spool with an aperture formed therein to receive gas from the gas supply and provide the gas via the aperture through the gas chamber to the pump for activating the same so as to draw and provide the fluid from the container to said another device, the gas chamber also having a valve assembly that responds to the fluid chamber force caused by the movement of the arrangement and moves and closes the aperture of the spool so as to stop providing the gas through the gas chamber to the pump so as to turn the pump off, wherein the gas chamber comprises a spring holder with a triggering mechanism arranged therein, the triggering mechanism is coupled between the spring holder and the valve assembly, the spring holder responds to the fluid chamber force by moving in one axial direction so as to actuate the triggering mechanism to move the valve assembly in an opposite direction for stopping the flow of gas or air via the aperture being provided to the pump so as to turn the pump off.