Patent ID: 8550020

Claim:
A variable pressure control system, comprising: a pressure source; at least one dual acting actuator; and a controller, comprising: a first regulator having an inlet and an outlet, said inlet in fluid communication with said pressure source, said outlet in fluid communication with a first side of said at least one dual acting actuator, said first regulator capable of selectively varying pressure at said outlet of said first regulator within a first pressure range; a second regulator having an inlet and an outlet, said inlet in fluid communication with said pressure source, said outlet in fluid communication with a second side of said at least one dual acting actuator, said second regulator capable of selectively varying pressure at said outlet of said second regulator within a second pressure range; wherein said controller includes a user interface having a range of motion to allow a user to select a desired pressure within said respective first and second pressure ranges at said first and second regulator outlets; and wherein said controller further includes a biasing mechanism operably coupling said user interface with said first and second regulators, whereby movement of said user interface within said first pressure range biases said first pressure regulator to maintain a corresponding pressure at said first regulator outlet, and whereby movement of said user interface within said second pressure range biases said second pressure regulator to maintain a corresponding pressure at said second regulator outlet.