Patent ID: 7708535

Claim:
A reciprocating fluid dispensing system configured to selectively dispense a precise and repeatable volume of fluid, the system comprising: a reciprocating fluid pump having a pump shaft and a pump cylinder; a pump drive motor coupled to the reciprocating fluid pump to selectively actuate the pump shaft within the pump cylinder; and an electrical adjustment mechanism coupled to the reciprocating fluid pump to precisely and repeatably adjust a stroke of the pump shaft, the electrical adjustment mechanism comprising: a linear actuator having a first surface defining a first plane and a screw extending outwardly from the first surface of the linear actuator, the screw generally defining a normal vector to the first plane; a slide having a sleeve element which slides on a guide rod, the sleeve being coupled to the linear actuator via the screw: a generally cylindrical cam follower element rotatable about an axis that is generally parallel the first plane; and a hinge block, wherein the sleeve element is coupled to the cam follower, and the hinge block includes a race configured to receive a bearing surface of the cam follower.