System and method for pumping fluid using a pump cassette

• US 8,485,800 B2
• Filed: 02/04/2011
• Issued: 07/16/2013
• Est. Priority Date: 10/30/2003
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Lanigan, Richard J., Dale, James D.
• Primary Examiner(s): Freay, Charles
• Assistant Examiner(s): DWIVEDI, VIKANSHA S
• Application Number:
  US13/021,532
• Publication Number:
  US 20120030933A1
• Time in Patent Office: 893 Days
• Field of Search: 417/477.2
• US Class Current: 417/477.2
• 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 cassette-loading assembly for placing a cassette into operable association with a control assembly comprising:

a support frame having a pivoting end and a free end, the pivoting end hingedly mounted to a first member attached to the control assembly, the free end of the support frame configured to swing toward or away from the control assembly, and configured to hold a cassette receptacle for receiving and holding the cassette;

the receptacle having a pivoting end and a free end, the pivoting end of the receptacle hingedly connected to the free end of the support frame, and the free end of the receptacle configured to swing toward or away from the control assembly and the pivoting end of the support frame,

wherein

the receptacle is configured to disassociate from the control assembly by movement of both the free end of the receptacle and the pivoting end of the receptacle away from the control assembly.

2. The cassette-loading assembly of claim 1, wherein the receptacle can is configured to move into association with the control assembly by movement of both the free end of the receptacle and the pivoting end of the receptacle toward the control assembly.

3. The cassette-loading assembly of claim 1, further comprising a door configured to enclose the support frame and receptacle when in a closed position, the door having a pivoting end and a free end, the pivoting end of the door being hingedly connected to a second member attached to the control assembly, wherein the pivoting end of the door is connected to the free end of the support frame so as to cause the free end of the support frame to swing away from the control assembly when the free end of the door is swung to an open position, and to cause the free end of the support frame to swing toward the control assembly when the free end of the door is swung to a closed position.

4. The cassette-loading assembly of claim 3, wherein the door is coupled to the free end of the support frame by a pin attached to the support frame and slidably engaged with a slot in the pivoting end of the door, said coupling causing the free end of the support frame to move away from the control assembly when the free end of the door is moved to an open position.

5. The cassette-loading assembly of claim 4, wherein the coupling of the door with the support frame causes the free end of the support frame to move toward the control assembly when the free end of the door is moved to a closed position.

6. The cassette-loading assembly of claim 4, wherein the slot is spaced apart from an axis of rotation formed by a hinge of the door.

7. The cassette-loading assembly of claim 6, wherein the slot curves at an increasing distance from the axis of rotation of the hinge of the door, such that closing the door causes the free end of the support frame to move toward the control assembly.

8. The cassette-loading assembly of claim 7, wherein opening the door causes the free end of the support member to move away from the control assembly.

9. The cassette-loading assembly of claim 1, wherein the receptacle comprises at least two brackets extending between the pivoting and free end of the receptacle, the brackets being spaced apart from one another so as to allow a cassette to be positioned between the brackets in the receptacle.

10. The cassette-loading assembly of claim 9, wherein the spacing between the brackets allows a cassette to be sufficiently secured in the receptacle so as to align the cassette with the control assembly when the receptacle is moved into association with the control assembly.