MECHANICAL DRIVE SYSTEM FOR A MEDICATION INFUSION SYSTEM

摘要

MECHANICAL DRIVE SYSTEM FOR A MEDICATION INFUSION SYSTEM A mechanical drive system for use in driving a disposable cassette containing a reciprocating fluid pump and active valves from a main pump unit is disclosed which utilizes a single power module cam to drive both the reciprocating pump and the valves. By using a unitary power module cam, the system completely eliminates the possibility of a timing error between the operation of the reciprocating pump and the valve. A one-way clutch is used to prevent the system from slipping into a reverse operation, and the operation of the valve actuators prevents the possibility of free flow through a cassette installed onto the main pump unit.