Patent ID: 8142397

Claim:
A method for pumping fluid in a medical fluid dispensing system with a pump including a pump module having a pump body made of a non-compliant material, the pump body having first and second pump chambers formed therein, each having a first, open end and an opposite, closed end, with the pump module further comprising a fluid inlet selectively in fluid communication with the first and second pump chambers and a fluid outlet selectively in fluid communication with the first and second pump chambers, the pump module further comprising first and second pistons in the first and second pump chambers, respectively; and first and second linear actuators, the first linear actuator being mechanically coupled to the first piston, the second linear actuator being mechanically coupled to the second piston, the method comprising: translating the first and second pistons with the corresponding linear actuator within the respective pump chambers toward and away from the closed end of the respective pump chambers; operating the linear actuators independently of one another.