Patent ID: 8147447

Claim:
An apparatus to control the flow from an infusion device, said means apparatus comprising: a) a single reservoir including a plurality of input orifices and an output orifice; b) at least one light source, c) a plurality of light detectors each positioned to detect light from the at least one of light source with a space between the light source and the light detector, and the light source and light detector positioned such that drops from one of the input orifices traverse through the space between the light source and the light detector at least partially blocking a light output from the light source, said detector having an electrical output proportional to the intensity of light received from said light source, d) a solenoid to restrict flow from the output orifice comprising an actuator that variably squeezes a compressible tube attached to the output orifice, e) a controller comprising a processor, memory, and, an input signal from the light detector and said controller having an output signal to control the flow from the infusion device.