Flexible tubing occlusion assembly
An occlusion assembly for compressing a pair of collapsible tubes comprises a frame comprising a tubing guide configured for positioning the collapsible tube. The occlusion assembly also comprises a tubing occluder mounted to the frame with an occluding member constructed and positioned to controllably occlude or release occlusion of the collapsible tube. A door mounted to the frame is positioned to cover at least a portion of the collapsible tube and tubing occluder when closed and provide user access when open. The assembly includes a retainer mechanism engaged by the door when the door is closed to permit operation of the tubing occluder when the door is closed and retain the tubing occluder in a non-occluding configuration when the door is opened.
1. An occlusion assembly for occluding at least one collapsible tube of a medical infusion device comprising:
an occluder having an occluding position that compresses the at least one collapsible tube, the occluder comprising:
one or more actuators configured to apply a motive force to act against a biasing force to place the occluder in a non-occluding position, and upon release of the motive force to allow the biasing force to restore the occluder to the occluding position; and
a latch configured to be captured by a retainer of the occluder;
a door closeable over the occluder and configured to move the retainer to a non-retaining position when the door is closed, wherein
when the door is closed the retainer is in the non-retaining position and does not capture or hold the latch, and the occluder can be moved between the occluding position and the non-occluding position; and
when the occluder is in the non-occluding position, opening the door leads to the retainer moving to a retaining position that captures and holds the latch, so that the occluder remains in the non-occluding position if the motive force applied by the one or more actuators is released.
2. The occlusion assembly of claim 1 , wherein the one or more actuators comprise a pneumatically driven actuator coupled to the occluder and a manually driven actuator coupled to the occluder, wherein the biasing force is generated by an occluder spring of the occluder, and wherein each actuator is configured to act against the biasing force of the occluder spring force to place the occluder in the non-occluding position.
3. The occlusion assembly of claim 2 , wherein the manually driven actuator comprises a button adjacent the door, which is arranged to be pressed by a user to overcome the biasing force generated by the occluder spring.
4. The occlusion assembly of claim 1 , wherein the occluder comprises a retainer spring connected to the retainer that is biased to apply a force against the retainer to place it in the retaining position when the door is open, and wherein the retainer is configured to be moved to the non-retaining position by closing the door against the force of the retainer spring.
5. The occlusion assembly of claim 1 , wherein the latch comprises a pin comprising a head portion and a narrower neck portion, and wherein the retainer comprises a slot that includes a receiving portion through which the head portion of the pin can pass, and a retention portion configured to capture the head portion, and wherein the receiving portion aligns with the head portion of the pin when the door is closed.