Controlled pressure fluid delivery device

A pressure control device for use with a flexible walled fluid carrying container, the device being adapted to control the pressure of fluid in the container within a predetermined pressure range whether the fluid is being discharged from the container or not, the pressure control device being suitable for use with a fluid flow controller which controls the flow rate of fluid being discharged from the container, the pressure control device including:

• a housing having a chamber therein for receiving the fluid carrying container;
• pressure generating means which is movable so as to apply a force on the fluid carrying container for generating pressure in the fluid within the container;
• drive means operatively connected to a power source so as to be able to adopt either an activated condition or a deactivated condition, said drive means operatively connected to said pressure generating means so that when in the activated condition it causes movement of said pressure generating means to apply a force on said container and in the deactivated condition, movement of the pressure generating means ceases;
• pressure monitoring means for monitoring the pressure of the fluid within said container, the monitoring means including sensor means which is adapted to engage the wall of the container;
• and
• control means which is responsive to said monitoring means and operable to cause said drive means to adopt either the activated condition or the deactivated condition, the arrangement being such that in operation the drive means is being activated or deactivated so that the pressure of the fluid within the container is maintained within the predetermined pressure range.