Occluder for a medical infusion system

An occluder for occluding at least two collapsible tube of a medical infusion device, the occluder comprising:

• a base having a front surface defining two substantially parallel pathways along each of which a length of at least one of the collapsible tubes can be placed, and having an opposing back surface onto which an occluder actuator is mounted, wherein the base is configured for mounting onto the medical infusion device;
• an occluding member located on the front surface of the base between the pathways and comprising a pivot shaft having a long axis that extends through the base from the back surface to the front surface, and that is rotationally movable about a pivot axis coincident with the long axis of the pivot shaft, the pivot shaft being approximately perpendicular to said back and front surface of the base, the occluding member comprising a pair of tube-compressing elements on opposing sides of the pivot shaft that are rotationally movable upon rotation of the occluding member, such that when the at least two collapsible tubes are installed on the pathways of the front surface of the base, the tube-compressing elements at least partially obstruct both pathways and substantially restrict or essentially completely inhibit fluid flow through the collapsible tubes when the occluding member is in an occluding position but that does not obstruct the pathways and substantially restrict fluid flow through the collapsible tubes when the occluding member is in a non-occluding position;
• the occluder actuator comprising an actuating shaft mechanically coupled to the pivot shaft, the actuating shaft having a long axis and a direction of travel that is approximately perpendicular to the pivot shaft and is arranged to cause rotation of the pivot shaft about the long axis of the pivot shaft, the occluder actuator further comprising a piston in a cylinder, the piston connected to the actuating shaft and moveable in the cylinder under a fluidic pressure delivered through a port in the cylinder;
• and
• a grip member forming part of or immobilized with respect to the occluding member, the grip member being manually movable between a first position and a second position, wherein movement of the grip member from the first position into the second position moves the occluding member from the occluding position into the non-occluding position,
• wherein actuation of the actuator through an introduction of a fluid into the cylinder causes an outward movement of the piston and rotation of the occluding member in a direction that moves the tube-compressing element away from the pathway.

An occluder for occluding at least two collapsible tubes of a medical infusion device, the occluder comprising:

• a base having a front surface defining two substantially parallel pathways along each of which a length of at least one of the collapsible tubes can be placed, and having an opposing back surface onto which an occluder actuator is mounted, wherein the base is configured for mounting onto the medical infusion device;
• an occluding member located on the front surface of the base and comprising a pivot shaft having a long axis that extends through the base from the back surface to the front surface, and that is rotationally movable about a pivot axis coincident with the long axis of the pivot shaft, the pivot shaft being approximately perpendicular to said back and front surface of the base, the occluding member comprising a pair of tube-compressing elements that are rotationally movable upon rotation of the occluding member, such that when the at least two collapsible tubes are installed on the pathways of the front surface of the base, the tube-compressing elements at least partially obstruct both pathways to substantially restrict or essentially completely inhibit fluid flow through the collapsible tubes when the occluding member is in an occluding position but that does not obstruct the pathways to substantially restrict fluid flow through the collapsible tubes when the occluding member is in a non-occluding position;
• the occluder actuator comprising a pneumatic actuator and having a fluidic inlet and a piston in a cylinder, the piston movable from a first position to a second position when the fluidic inlet is pressurized, the movable piston being mechanically interconnected with the pivot shaft of the occluding member such that extension of the movable piston into the second position causes the occluding member to move into the non-occluding position;
• and
• a grip member forming part of or immobilized with respect to the occluding member, the grip member being manually movable between a first position and a second position, wherein movement of the grip member from the first position into the second position moves the occluding member from the occluding position into the non-occluding position.

An occluder for occluding at least two collapsible tubes of a medical infusion device, the occluder comprising:

• a base having a front surface defining two substantially parallel pathways along each of which a length of at least one of the collapsible tubes can be placed, and having an opposing back surface onto which an occluder actuator is mounted, wherein the base is configured for mounting onto the medical infusion device;
• an occluding member located on the front surface of the base and comprising a pivot shaft having a long axis that extends through the base from the back surface to the front surface, and that is rotationally movable about a pivot axis coincident with the long axis of the pivot shaft, the pivot shaft being approximately perpendicular to said back and front surface of the base, the occluding member comprising a pair of tube-compressing elements that are rotationally movable upon rotation of the occluding member pivot shaft, such that when the at least two collapsible tubes are installed on the pathways of the front surface of the base, the tube-compressing elements at least partially obstruct the pathways to substantially restrict or essentially completely inhibit fluid flow through the collapsible tubes when the occluding member is in an occluding position but that does not obstruct the pathways to substantially restrict fluid flow through the collapsible tubes when the occluding member is in a non-occluding position;
• a lever arm mounted on the back surface of the base and having a first end connected to the occluding member pivot shaft, the lever arm being rotationally movable about the axis of the pivot shaft to move the occluding member from the occluding position to the non-occluding position, the lever arm moving the occluding member between the first position and the second position when the lever arm is moved from the first to the second position;
• the occluder actuator comprising a pneumatic actuator and comprising a movable piston in a cylinder having a pneumatic port, the piston being connected to a second end of the lever arm and extendable upon pneumatic pressurization of the actuator from a first position to a second position, wherein extension of the piston into the second position causes the lever arm to move from the first position to the second position and the occluding member to move from the occluding position into the non-occluding position;
• and
• a grip member forming part of or immobilized with respect to the occluding member, the grip member being manually movable between a first position and a second position, wherein movement of the grip member from the first position into the second position moves the occluding member from the occluding position into the non-occluding position.