Methods for pulsed delivery of fluids from a pump
First Claim
1. A method for pumping a liquid at a desired average flow rate with a pumping cartridge, the cartridge including at least one pump chamber, at least a portion of which pump chamber includes a movable surface, the method comprising the steps of:
- a. at least partially filling said pump chamber with a liquid;
b. isolating said pump chamber;
c. applying a force to said movable surface;
d. regulating the flow of liquid from the pump chamber while maintaining said force on the surface.
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Accused Products
Abstract
Methods and systems are disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constructed and configured to be coupled to a reusable pump drive component. In other embodiments, the pumping cartridges include multiple pump chambers, which pump chambers are operated so that a pump flow rate of one pump chamber is a predetermined fraction of the pump flow rate of another pump chamber within the pumping cartridge.
84 Citations
21 Claims
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1. A method for pumping a liquid at a desired average flow rate with a pumping cartridge, the cartridge including at least one pump chamber, at least a portion of which pump chamber includes a movable surface, the method comprising the steps of:
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a. at least partially filling said pump chamber with a liquid;
b. isolating said pump chamber;
c. applying a force to said movable surface;
d. regulating the flow of liquid from the pump chamber while maintaining said force on the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for pumping a liquid at a desired average flow rate with a pumping cartridge including at least one pump chamber, at least a portion of which pump chamber comprises a movable surface, comprising:
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a. closing a valve positioned on an outlet line of said pump chamber;
b. at least partially filling said pump chamber with a liquid;
c. closing a valve positioned on an inlet line of said pump chamber, thereby isolating said pump chamber; and
, while maintaining said inlet valve in a closed position,d. applying a force to said movable surface; and
e. opening the outlet valve for predetermined time periods at predetermined intervals while maintaining the force on the movable surface, said predetermined time periods and intervals selected to yield a desired average flow rate. - View Dependent Claims (20, 21)
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Specification