Patent ID: 8317493

Claim:
A pump for use in handling one or more different process fluids, comprising: a plurality of pumping chambers, each pumping chamber adapted to independently pump one of the plurality of different process fluids, each pumping chamber including a process fluid inlet and a process fluid outlet, and a process fluid valve associated with each pumping chamber, the process fluid outlet coupled to the process fluid valve for selectively preventing and allowing the flow of process fluid through the pumping chamber; an actuation mechanism for selectively pumping substantially incompressible actuating fluid to and from a plurality of actuating fluid chambers, wherein the actuation mechanism is in fluid communication with the plurality of actuating fluid chambers, the actuation mechanism selectively actuatable in a first direction to force actuating fluid into one of the plurality of actuating fluid chambers when dispensing one of the plurality of different process fluids and selectively actuatable in a second direction to draw actuating fluid out of one of the plurality of actuating fluid chambers thereby drawing one of the plurality of different process fluids into one of the plurality of pumping chambers, wherein the actuating fluid is in a closed system such that substantially no actuating fluid is removed from the system; at least one diaphragm separating each pumping chamber from an associated actuating fluid chamber, for separating process fluid from actuating fluid; wherein the actuation mechanism is removable by a quick disconnect connection that provides for disconnection of the actuation mechanism without affecting process fluid in the process fluid inlet, process fluid outlet, process fluid valve, or process fluid in each pumping chamber, wherein the actuation mechanism comprises a piston translated by a screw turned by a motor; whereby operation of the actuation mechanism to displace actuating fluid causes actuating fluid to flow only into each of the plurality of actuating fluid chambers having an opened process fluid valve, resulting in pumping of process fluid.