Valve systems and injector system including such valve systems

• US 7,475,701 B2
• Filed: 05/24/2006
• Issued: 01/13/2009
• Est. Priority Date: 05/24/2006
• Status: Active Grant

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Trocki, Mark, Reilly, David M.
• Primary Examiner(s): Hepperle; Stephen M
• Application Number:
  US11/420,094
• Publication Number:
  US 20070272311A1
• Time in Patent Office: 965 Days
• Field of Search: 137/102, 137/111, 137/112, 137/113, 137/114, 137/512.4
• US Class Current: 137/112
• CPC Class Codes: A61M 2039/2473 Valve comprising a non-deformable, movable element, e.g. ball-valve, valve with movable stopper or reciprocating element
• CPC Class Codes: A61M 2039/2486 Guided stem, e.g. reciprocating stopper
• CPC Class Codes: A61M 2039/2493 Check valve with complex design, e.g. several inlets and outlets and several check valves in one body
• CPC Class Codes: A61M 39/223 Multiway valves
• CPC Class Codes: A61M 39/228 with a tubular diaphragm constrictable by radial fluid force
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: Y10T 137/2567 Alternate or successive inflows
• CPC Class Codes: Y10T 137/2569 Control by depletion of source
• CPC Class Codes: Y10T 137/2572 One inflow supplements another
• CPC Class Codes: Y10T 137/2622 Bypass or relief valve responsive to pressure downstream of outlet valve
• CPC Class Codes: Y10T 137/7838 Plural
• CPC Class Codes: Y10T 137/7843 Integral resilient member forms plural valves
• CPC Class Codes: Y10T 137/7849 Bypass in valve casing
• CPC Class Codes: Y10T 137/86726 Valve with bypass connections
• CPC Class Codes: Y10T 137/87338 Flow passage with bypass
• CPC Class Codes: Y10T 137/87555 Having direct response valve [e.g., check valve, etc.]

Abstract

A valve system for use in a system including a first source of a first pressurized fluid and a second source of a second pressurized fluid includes a valve housing including a first inlet port adapted to be placed in fluid connection with the first source, a second inlet port adapted to be placed in fluid connection with the second source and an outlet port. The valve system further includes a backflow prevention system to prevent flow of the first pressurized fluid through the second inlet and to prevent flow of the second pressurized fluid through the first inlet port. The valve system is adapted to provide a fluid path between at least the first inlet port and the outlet port to enable fluid to be drawn from the outlet port to the first inlet port. Several of the valve systems of the present invention provide for flow from the first inlet port to the outlet port and concurrent flow from the second inlet port to the outlet port.

Claims

1. A valve system for use in a system comprising a first source of a first pressurized fluid and a second source of a second pressurized fluid, the valve system comprising:

a valve housing comprising a first inlet port adapted to be placed in fluid connection with the first source, a second inlet port adapted to be placed in fluid connection with the second source and an outlet port; and

a backflow prevention system comprising a deformable sealing member having a first portion and a second portion, the deformable sealing member biased to prevent flow of the first pressurized fluid through the second inlet and to prevent flow of the second pressurized fluid through the first inlet port,

wherein the valve system is adapted to provide a fluid path between at least the first inlet port and the outlet port to enable fluid to be drawn from the outlet port to the first inlet port, and further wherein flow of the second pressurized fluid into the second inlet port at a first pressure deforms the first portion of the sealing member to block flow into the first inlet port and flow of the second pressurized fluid into the second inlet port at a second pressure higher than the first pressure deforms the second portion of the sealing member to open a fluid path between the second inlet port and the outlet port.

2. The valve system of claim 1 wherein the valve housing comprises a first housing member comprising the first inlet port and a second housing member comprising the second inlet port, the first housing member and the second housing member being attached to form the valve housing, the deformable sealing member being positioned between the first housing member and the second housing member.

3. The valve system of claim 1 wherein flow of the first pressurized fluid into the first inlet port and concurrent flow of the second pressurized fluid into the second inlet port causes flow from the first inlet port into the outlet port and concurrent flow from the second inlet port into the outlet port.

4. The valve system of claim 1 providing for flow from the first inlet port to the outlet port and concurrent flow from the second inlet port to the outlet port.

5. The valve system of claim 1 wherein the first portion of the deformable sealing member comprises a central portion and the second portion of the deformable sealing member comprises a peripheral portion.

6. An injection system comprising:

a first source of a first pressurized fluid;

a second source of a second pressurized fluid, and

a valve system comprising;

a valve housing comprising a first inlet port in fluid connection with the first source, a second inlet port in fluid connection with the second source and an outlet port; and

a backflow prevention system comprising a deformable sealing member having a first portion and a second portion, the deformable sealing member biased to prevent flow of the first pressurized fluid through the second inlet and to prevent flow of the second pressurized fluid through the first inlet port,

wherein the valve system is adapted to provide a fluid path between at least the first inlet port and the outlet port to enable fluid to be drawn from the outlet port to the first inlet port, and further wherein flow of the second pressurized fluid into the second inlet port at a first pressure deforms the first portion of the sealing member to block flow into the first inlet port and flow of the second pressurized fluid into the second inlet port at a second pressure higher than the first pressure deforms the second portion of the sealing member to open a fluid path between the second inlet port and the outlet port.

7. The injection system of claim 6 wherein the first source is a first syringe in fluid connection with a powered injector and the second source is a second syringe in fluid connection with the powered injector.

8. The injection system of claim 6 wherein the first portion of the deformable sealing member comprises a central portion and the second portion of the deformable sealing member comprises a peripheral portion.

9. A valve system for use in a system comprising a first source of a first pressurized fluid and a second source of a second pressurized fluid, the valve system comprising:

a valve housing comprising a first inlet port adapted to be placed in fluid connection with the first source, a second inlet port adapted to be placed in fluid connection with the second source and an outlet port;

at least one deformable sealing member having a central portion and an outer portion, the at least one deformable sealing member in operative connection with the first inlet port and the second inlet port, the at least one deforrnable sealing member being biased to block flow into the second inlet port, and

wherein the valve system is adapted to provide a fluid path between the first inlet port and the outlet port, and further wherein flow of the second pressurized fluid into the second inlet port at a first pressure deforms the central portion of the sealing member to block flow into the first inlet port and further wherein flow of the second pressurized fluid into the second inlet port at a second pressure, higher than the first pressure, deforms the outer portion of the sealing member to open a fluid path between the second inlet port and the outlet port.

10. The valve system of claim 9 wherein flow of the first pressurized fluid into the first inlet port and concurrent flow of the second pressurized fluid into the second inlet port deforms the central portion of the deformable sealing member and causes flow from the first inlet port into the outlet port and concurrent flow from the second inlet port into the outlet port.

11. The valve system for claim 9 wherein the valve housing comprises a first housing member comprising the first inlet port and a second housing member comprising the second inlet port, the first housing member and the second housing member being attached to form the valve housing, the deformable sealing member being positioned between the first housing member and the second housing member.

12. The valve system for claim 9 wherein the valve housing comprises a first housing member and a second housing member that are attachable to form the valve housing comprising the first inlet port, the second inlet port and the outlet port, the deformable sealing member being positioned between the first housing member and the second housing member.