Abstract: A device for regulating the flow rate of a fluid includes a housing containing a plurality of flow conduits fluidly connecting an inlet and an outlets each of the flow conduits comprising a flow control tube and a resiliently compressive occlusion tube, wherein the flow control tubes are of substantially equal internal diameter. Each of the flow control tubes has a length associated with a different flow rate. A resilient flow-blocking element is operatively associated with each of the occlusion tubes and is movable into a flow-blocking compression against its associated occlusion tube. An actuation mechanism in the housing is operable (a) to selectively engage and move one or more of the flow-blocking elements into the flow-blocking compression against its associated occlusion tube, and (b) to selectively be disengaged from any of the flow-blocking elements.

Abstract: A device for regulating the flow rate of a fluid includes a housing containing a plurality of flow conduits fluidly connecting an inlet and an outlets each of the flow conduits comprising a flow control tube and a resiliently compressive occlusion tube, wherein the flow control tubes are of substantially equal internal diameter. Each of the flow control tubes has a length associated with a different flow rate. A resilient flow-blocking element is operatively associated with each of the occlusion tubes and is movable into a flow-blocking compression against its associated occlusion tube. An actuation mechanism in the housing is operable (a) to selectively engage and move one or more of the flow-blocking elements into the flow-blocking compression against its associated occlusion tube, and (b) to selectively be disengaged from any of the flow-blocking elements.

Abstract: A device for regulating the flow rate of a fluid includes a housing containing a plurality of flow conduits fluidly connecting an inlet and an outlet, each of the flow conduits comprising a flow control tube (310, 312, 314) and a resiliently compressive occlusion tube (316, 318, 320), wherein the flow control tubes are of substantially equal internal diameter. Each of the flow control tubes has a length associated with a different flow rate. A resilient flow-blocking element (212a, 212b, 212c) is operatively associated with each of the occlusion tubes and is movable into a flow-blocking compression against its associated occlusion tube. An actuation mechanism (206) in the housing is operable: (a) to selectively engage and move one or more of the flow-blocking elements into the flow-blocking compression against its associated occlusion tube, and (b) to selectively be disengaged from any of the flow-blocking elements.

Abstract: A patient controlled liquid drug administration device comprises a reciprocating pump having an inlet connectable to a source of a pressurized liquid drug, and an outlet connectable to the patient. A clamp rotates between closed and open positions respectively blocking and enabling pump outflow. A plunger above the pump has an end contacting a movable wall of the pump and is movable between raised and lowered positions. A button above the plunger moves between extended and depressed positions, and has a ledge that engages the clamp when the button is moved to the depressed position and moves the clamp to its open position. A compression spring is disposed between the plunger and the button. A spring catch engages a detent in the button when the button is moved to its depressed position and holds the button there until released by a catch release on the plunger that disengages the spring catch from the detent in the button when the plunger is moved to its lowered position.

Abstract: A patient controlled liquid drug administration device comprises a reciprocating pump having an inlet connectable to a source of a pressurized liquid drug, and an outlet connectable to the patient. A clamp rotates between closed and open positions respectively blocking and enabling pump outflow. A plunger above the pump has an end contacting a movable wall of the pump and is movable between raised and lowered positions. A button above the plunger moves between extended and depressed positions, and has a ledge that engages the clamp when the button is moved to the depressed position and moves the clamp to its open position. A compression spring is disposed between the plunger and the button. A spring catch engages a detent in the button when the button is moved to its depressed position and holds the button there until released by a catch release on the plunger that disengages the spring catch from the detent in the button when the plunger is moved to its lowered position.