ANTI FREE-FLOW OCCLUDER AND PRIMING ACTUATOR PAD

• US 20120083737A1
• Filed: 09/29/2011
• Published: 04/05/2012
• Est. Priority Date: 10/01/2010
• Status: Active Grant

• Current Assignee: Zevex (Moog Incorporated)
• Original Assignee: Zevex (Moog Incorporated)
• Inventors: Beck, Kent
• Granted Patent: US 8,911,414 B2
• Time in Patent Office: Days
• US Class Current: 604/151
• CPC Class Codes: A61M 2039/087 Tools for handling tubes, e.g. crimping tool for connecting tubes to a connector
• CPC Class Codes: A61M 39/225 Flush valves, i.e. bypass valves for flushing line
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: A61M 39/288 by bending or twisting the tube
• CPC Class Codes: A61M 5/14212 Pumping with an aspiration and an expulsion action
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: A61M 5/16881 Regulating valves on-off valves, e.g. clamps A61M39/28

Abstract

A system for selectively preventing free flow in a tube includes an in-line occluder disposed in the tube and an actuator pad for creating a flow path between the tube and the occluder. The actuation pad presses towards the occluder from a single side and stretches the tube to create a large flow path. The occluder stem is strengthened to resist deformation and damage from the forces applied by the actuator pad.

Claims

1. An in-line occluder comprising:

a flexible tubing having a bore;

an occluder disposed in the bore, the occluder comprising;

a body;

an occluder, the occluder having a round cross-section and engaging the bore of the tubing to seal against the tubing and prevent flow past the tubing; and

a stem connecting the body to the occluder, the stem having a ‘

T’

shaped cross section.

2. The occluder of claim 1, wherein the stem comprises a side wall disposed along a side of the stem and a center web attached to the middle of the side wall and extending perpendicular thereto towards an opposite side of the stem.

3. The occluder of claim 2, wherein the body comprises a longitudinal bore extending along the length thereof and a lateral bore extending laterally through and end of the body adjacent the stem.

4. The occluder of claim 3, wherein the lateral bore extends generally perpendicular to the center web.

5. The occluder of claim 3, wherein fluid flows between the occluder and the tubing, around the center web, and through the body.

6. A system comprising the occluder of claim 2, and further comprising an actuator pad disposed adjacent the occluder, and wherein the actuator pad presses inwardly on an outer surface of the tubing on one side of the tubing to open a flow passage between the occluder and an opposite side of the tubing.

7. The system of claim 6, wherein the actuator pad comprises two projections having curved ends and an actuation channel disposed between the two projections, and wherein the actuator pad engages the tubing between the two projections and presses the tubing and occluder towards the actuation channel.

8. The system of claim 7, wherein the actuation channel tapers such that a bottom of the channel is narrower than a top of the channel.

9. The system of claim 7, wherein the two projections have a radius of curvature approximately equal to the radius of the occluder, and wherein the actuation channel has a width approximately equal to the diameter of the occluder.

10. The system of claim 6, wherein the actuator pad is connected to the occluder.

11. The system of claim 6, further comprising a pump having a pump door, wherein the occluder and actuator pad are mounted in the pump, and wherein the pump door engages the actuator pad to press the actuator pad against the tubing to open a flow channel past the occluder.

12. The system of claim 11, wherein a projection on the pump door moves in a first direction when the door is closed and wherein the projection engages the actuator pad and presses the actuator pad in a second direction perpendicular to the first direction to thereby press the actuator pad against the tubing.

13. An occluder system comprising;

a flexible tubing having a lumen;

an occluder comprising;

a body;

a stem having a first end and a second end, the first end being attached to the body; and

an occluder attached to the second end of the stem and spaced apart from the body, the occluder being disposed in the lumen of the tube and having a round cross-section with a diameter greater than the diameter of the lumen;

an actuator pad, the actuator pad comprising;

two projections; and

an actuation channel disposed between the two projections; and

wherein the actuation pad selectively engages the tubing on one side of the tubing to create a flow passage between the occluder and an opposite side of the tubing.

14. The system of claim 13, wherein the two projections have curved ends.

15. The system of claim 14, wherein the two projections each have a radius of curvature which is approximately equal to the radius of the occluder.

16. The system of claim 13, wherein the actuation channel has a width approximately equal to the diameter of the occluder.

17. The system of claim 13, wherein the actuation channel tapers such that a top of the action channel is wider than a bottom of the actuation channel.

18. The system of claim 13, wherein a top portion of the actuation channel transitions into the curved ends such that the curved ends curve away from the actuation channel.

19. The system of claim 13, wherein the actuation channel has a rounded bottom.

20. The system of claim 13, wherein the actuator pad is movable towards the occluder to engage the tube and open a flow channel between the occluder and the tube.

21. The system of claim 13, wherein the actuator pad is attached to the occluder and is pivotable towards the occluder.

22. The system of claim 13, wherein the actuator pad further comprises a recessed tip portion adjacent the projections, and wherein the tip portion contacts the tube to displace the tube laterally when the actuator pad engages the tube to open a flow passage.

23. The system of claim 13, wherein the actuation channel is tapered so as to be narrower at the bottom.

24. The system of claim 23, wherein the actuation channel tapers between 5 and 20 degrees.