Controlled pressure fluid delivery device
First Claim
1. 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.
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Accused Products
Abstract
A constant pressure device for use with administration sets for infusing liquids into patients. The device includes a housing adapted to receive a container for holding and discharging liquid into the body of a patient. The constant pressure can be pre-set to a desired pressure according to the requirements of a particular circumstance. The device maintains constant pressure independent of gravity, relative pressure head height, or fluid viscosity. The device has a housing in which a collapsible container is inserted. The constant pressure device has a drive which exerts a predetermined pressure on the container thereby dispensing a predetermined amount of liquid. The device also has an energy storing mechanism located within the housing which is linked to a gearing assembly to control the drive. The device has a pressure-responsive mechanism to deactivate the drive when the pressure becomes too great.
22 Citations
18 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification