Patent ID: 7314026

Claim:
An electronic valve actuator, comprising: an electromagnet; an armature disposed adjacent to the electromagnet; a fluid-containing chamber having: a first piston providing a first wall portion of the chamber, such first piston being movable in the chamber along a direction of motion, such first wall portion having a first projected surface area, such first projected surface area being the surface area of the first wall portion projected onto a plane normal to the direction of motion of the first piston; and a second piston providing a second wall portion of the chamber, such second piston being movable in the chamber along a direction of motion, such second wall portion having a second projected surface area, such second projected surface area being the surface area of the second wall portion projected onto a plane normal to the direction of motion of the second piston, the first projected wall portion being different from the second projected surface area; and wherein the first piston is coupled to the armature and the second piston is coupled to a valve.