CONTINUOUS FLUID DELIVERY SYSTEM

• US 20110002802A1
• Filed: 12/10/2008
• Published: 01/06/2011
• Est. Priority Date: 12/10/2007
• Status: Active Grant

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Capone, Christopher D., Delonga, Roger V., Seman, Richard A., Bazala, Jason L., Neill, James R.
• Granted Patent: US 9,057,363 B2
• Time in Patent Office: Days
• US Class Current: 417/486
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: F04B 1/124 Pistons
• CPC Class Codes: F04B 13/02 of two or more fluids at the same time
• CPC Class Codes: F04B 19/04 Pumps for special use
• CPC Class Codes: F04B 3/00 Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
• CPC Class Codes: F04B 53/10 Valves; Arrangement of valves
• CPC Class Codes: F04B 53/143 Sealing provided on the piston
• CPC Class Codes: F04B 53/16 Casings; Cylinders; Cylinder liners or heads; Fluid connections
• CPC Class Codes: F04B 7/00 Piston machines or pumps characterised by having positively-driven valving

Abstract

The continuous fluid delivery systems includes a fluid pumping device comprising a pump housing comprising a base member with a plurality of inlet ports and at least one outlet port and at least two pairs of opposing pistons movably associated with the housing. Each pair of opposing pistons at least in part defines a respective pumping chamber of the fluid pumping device. The pistons in each pair of opposing pistons may be independently controlled such that any one of the plurality of inlet ports or the at least one outlet port is independently selectable to be in fluid communication with one of the respective pumping chambers. A drive system may be interfaced with the respective pistons to at least reciprocally operate the pistons relative to the base member. The pump housing and the at least two pairs of opposing pistons may comprise a disposable unit.

Claims

1. A fluid pumping device, comprising:

a pump housing comprising a base member comprising a plurality of inlet ports and at least one outlet port; and

a pair of opposing pistons movably associated with the base member, the pistons at least in part defining a pumping chamber of the fluid pumping device, and the pistons independently controlled such that any one of the plurality of inlet ports or the at least one outlet port is independently selectable to be in fluid communication with the pumping chamber.

2. A fluid pumping device as claimed in claim 1, wherein the base member supports the pistons to at least reciprocally operate relative to the base member.

3. A fluid pumping device as claimed in claim 1, wherein the base member comprises a manifold portion defining the plurality of inlet ports and the at least one outlet port.

4. A fluid pumping device as claimed in claim 3, further comprising a manifold cap on the manifold portion and defining the plurality of inlet ports and the at least one outlet port in combination with the manifold portion.

5. A fluid pumping device as claimed in claim 3, wherein the manifold portion comprises a plurality of fluid passageways respectively connected to the plurality of inlet ports and the at least one outlet port.

6. A fluid pumping device as claimed in claim 5, wherein the base member comprises at least one opening in each fluid passageway to enable fluid communication between the pumping chamber and the plurality of inlet ports and the at least one outlet port via the fluid passageways.

7. A fluid pumping device as claimed in claim 1, wherein one of the pistons comprises a sleeve portion and the other of the pistons is at least partially disposed in the sleeve portion to define the pumping chamber.

8. A fluid pumping device as claimed in claim 7, wherein the sleeve portion defines an opening for fluid communication with a selected inlet port or the at least one outlet port to establish fluid communication between the selected inlet port or the at least one outlet port and the pumping chamber.

9. A fluid pumping device as claimed in claim 7, further comprising a fluid seal element disposed between the base member and the sleeve portion.

10. A fluid pumping device as claimed in claim 1, wherein the base member comprises a manifold portion defining the plurality of inlet ports and the at least one outlet port, and wherein the plurality of inlet ports and the at least one outlet port are disposed on lateral sides of the manifold portion.

11. A fluid delivery system, comprising:

a pump housing comprising a base member comprising a plurality of inlet ports and at least one outlet port;

a pair of opposing pistons movably associated with the base member, the pistons at least in part defining a pumping chamber of the fluid pumping device, and the pistons independently controlled such that any one of the plurality of inlet ports or the at least one outlet port is independently selectable to be in fluid communication with the pumping chamber; and

a drive system interfaced with the pistons to at least reciprocally operate the pistons relative to the base member.

12. A fluid delivery system as claimed in claim 11, wherein the drive system comprises respective piston positioning devices interfaced with each piston.

13. A fluid delivery system as claimed in claim 11, wherein the piston positioning devices are disposed on opposite sides of the base member to interface with the respective pistons.

14. A fluid delivery system as claimed in claim 11, wherein the piston positioning devices are each disposed on the same side of the base member to interface with the respective pistons.

15. A fluid delivery system as claimed in claim 14, wherein the piston positioning devices are disposed commonly on a carriage.

16. A fluid delivery system as claimed in claim 15, wherein the carriage is movable by a carriage drive system.

17. A fluid delivery system as claimed in claim 16, wherein the carriage is bi-directional linearly movable by the carriage drive system.

18. A fluid delivery system as claimed in claim 15, further comprising a position sensor associated with the drive system to interface with the carriage to ascertain at least one position of the carriage.

19. A fluid delivery system as claimed in claim 11, further comprising a support device to support at least one of the pistons in the drive system.

20. A fluid delivery system as claimed in claim 11, further comprising a position sensor associated with the drive system to interface with at least one of the piston positioning devices to ascertain at least one position of the piston positioning device.

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