System and method for pumping fluid using a pump cassette

• US 20050095141A1
• Filed: 10/30/2003
• Published: 05/05/2005
• Est. Priority Date: 10/30/2003
• Status: Abandoned Application

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Dale, James D., Lanigan, Richard J.
• Application Number:
  US10/697,176
• Publication Number:
  US 20050095141A1
• Time in Patent Office: Days
• US Class Current: 417/53
• CPC Class Codes: A61L 2/0088 Liquid substances
• CPC Class Codes: A61L 2/24 Apparatus using programmed or automatic operation
• CPC Class Codes: A61M 1/0213 with isolated sections of the tube used as additive reservoirs
• CPC Class Codes: A61M 1/0272 Apparatus for treatment of blood or blood constituents prior to or for conservation, e.g. freezing, drying or centrifuging
• CPC Class Codes: A61M 1/0281 Apparatus for treatment of blood or blood constituents prior to transfusion, e.g. washing, filtering or thawing
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/3687 Chemical treatment A61M1/3675 takes precedence
• CPC Class Codes: A61M 2205/125 with incorporated filters
• CPC Class Codes: B01F 23/451 by injecting one liquid into another
• CPC Class Codes: B01F 23/49 Mixing systems, i.e. flow charts or diagrams
• CPC Class Codes: B01F 25/105 Mixing heads, i.e. compact mixing units or modules, using mixing valves for feeding and mixing at least two components
• CPC Class Codes: B01F 25/60 Pump mixers, i.e. mixing within a pump
• CPC Class Codes: B01F 33/81 Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
• CPC Class Codes: B01F 33/811 in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
• CPC Class Codes: B01F 35/711 for feeding a mixture of components, i.e. solids in liquid, solids in a gas stream
• CPC Class Codes: B01F 35/715 Feeding the components in several steps, e.g. successive steps
• CPC Class Codes: B01F 35/8823 using diaphragms or bellows
• CPC Class Codes: F04B 13/02 of two or more fluids at the same time
• CPC Class Codes: F04B 23/02 having reservoirs
• CPC Class Codes: F04B 23/06 the pumps being all of reciprocating positive-displacement type
• CPC Class Codes: F04B 43/0009 : Special features
• CPC Class Codes: F04B 43/06 : Pumps having fluid drive
• CPC Class Codes: F04B 49/22 : by means of valves F04B49/03 takes precedence
• CPC Class Codes: F04B 53/06 : Venting
• CPC Class Codes: F04B 53/16 : Casings; Cylinders; Cylinder liners or heads; Fluid connections
• CPC Class Codes: F04B 53/22 : Arrangements for enabling ready assembly or disassembly
• CPC Class Codes: G05D 11/132 : by controlling the flow of the individual components G05D11/133 takes precedence
• CPC Class Codes: Y02A 50/30 : Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
• CPC Class Codes: Y10T 137/0329 : Mixing of plural fluids of diverse characteristics or conditions
• CPC Class Codes: Y10T 137/0352 : Controlled by pressure
• CPC Class Codes: Y10T 137/86131 : Plural
• CPC Class Codes: Y10T 137/87652 : With means to promote mixing or combining of plural fluids
• CPC Class Codes: Y10T 29/53 : Means to assemble or disassemble
• CPC Class Codes: Y10T 292/0911 : Hooked end
• CPC Class Codes: Y10T 292/212 : With expanding or contracting means
• CPC Class Codes: Y10T 292/438 : Spring-arm catch

Abstract

A system and method for pumping fluid using a pump cassette. The system includes a control assembly for operating the pump cassette. A force assembly having a movable member is capable of applying force to the pump cassette to press the pump cassette against the control assembly. The movable member may be an expandable member, such as a bladder.

Claims

1. A system for pumping fluid using a pump cassette, the system comprising:

a control assembly for operating the pump cassette, and

a force assembly having a movable member capable of applying force to the pump cassette to press the pump cassette against the control assembly.

2. The system according to claim 1, wherein the movable member includes an expandable member capable of expanding to press the pump cassette against the control assembly.

3. The system according to claim 2, wherein the expandable member is a bladder.

4. The system according to claim 1, wherein the force assembly includes a door, the movable member attached to the door.

5. The system according to claim 1, wherein the force assembly includes a back plate and a frame, the movable member positioned between the back plate and the frame.

6. The system according to claim 1, further comprising a pneumatic circuit for controlling the movable member.

7. The system according to claim 1, wherein the movable member is coupled to a piston assembly, the piston assembly capable of contacting the pump cassette.

8. The system according to claim 1, further including a cassette receptacle for receiving the pump cassette.

9. The system according to claim 8, wherein the force assembly is movably coupled to the control assembly to allow access to the cassette receptacle.

10. The system according to claim 8, wherein the cassette receptacle is movably coupled to the force assembly.

11. The system according to claim 8, wherein the cassette receptacle is movably coupled to the control assembly.

12. The system according to claim 1, wherein the control assembly includes:

a bezel; and

a bezel gasket including a membrane capable of being displaced to operate the pump cassette.

13. The system according to claim 12, further including a pneumatic control circuit for displacing the membrane.

14. The system according to claim 12, wherein the control assembly includes a rigid plate to which the bezel is attached.

15. A method of pumping fluid using a pump cassette comprising:

providing the pump cassette;

providing a control assembly capable of operating the pump cassette;

inserting the pump cassette into a cassette receptacle;

moving a movable member against at least one of the cassette receptacle and the pump cassette to press the pump cassette against the control assembly.

16. The method according to claim 15, wherein the movable member is capable of expanding, and wherein moving the movable member against at least one of the cassette receptable and the pump cassette includes:

expanding the movable member to press the pump cassette against the control assembly.

17. The method according to claim 16, wherein expanding the movable member includes pneumatically operating the expandable member.

18. The method according to claim 15, further including pumping at least one fluid through the pump cassette.

19. The method according to claim 15, wherein the control assembly includes a membrane capable of being displaced, and wherein said pumping includes:

pneumatically displacing the membrane to operate the pump cassette.

20. The method according to claim 15, wherein inserting the pump cassette into the cassette receptacle includes:

opening a door coupled to the control assembly to gain access to the cassette receptacle, the movable member attached to the door.

21. A system for pumping fluid using a pump cassette, the system comprising:

means for operating the pump cassette; and

movable means for applying force to the pump cassette to press the pump cassette against the operating means.

22. The system according to claim 21, wherein the means for applying force to the pump cassette includes an expandable member capable of expanding to press the pump cassette against the operating means.

23. The system according to claim 22, wherein the means for applying force to the pump cassette includes a door, the expandable member coupled to the door.

24. The system according to claim 22, wherein the expandable member is a bladder.

25. The system according to claim 21, wherein the operating means includes:

a bezel; and

a bezel gasket including a membrane capable of being displaced operate the pump cassette.

26. The system according to claim 21, further comprising a cassette receptacle for receiving the pump cassette.

27. The system according to claim 26, wherein the means for applying force to the pump cassette is movably coupled to the operating means, to allow access to the cassette receptacle.