Patent ID: 7458310

Claim:
An asymmetric volume booster assembly, comprising: an actuator movable in a first direction and a second direction; a first booster in fluid communication with the actuator, the first booster including a first supply passage and a first exhaust passage, wherein the first supply passage supplies fluid to the actuator and the first exhaust passage exhausts fluid from the actuator, the first exhaust passage configured to produce a first fluid flow resistance; and a second booster in fluid communication with the actuator, the second booster including a second supply passage and a second exhaust passage, wherein the second supply passage supplies fluid to the actuator and the second exhaust passage exhausts fluid from the actuator, the second exhaust passage configured to produce a second fluid flow resistance; wherein the first fluid flow resistance is greater than the second fluid flow resistance, such that the actuator moves substantially symmetrically in the first direction and the second direction; wherein the first exhaust passage includes a first constricted portion, and the second exhaust passage includes a second constricted portion, the first constricted portion having a smaller cross sectional area than the second constricted portion; and wherein the first exhaust passage includes a first output chamber, a first exhaust port, a first exhaust chamber, a first manifold including passages, and a first exhaust outlet, the second exhaust passage includes a second output chamber, a second exhaust port, a second exhaust chamber, a second manifold including passages, and a second exhaust outlet, and wherein the first exhaust port defines the first constricted portion, and the second exhaust port defines the second constricted portion.