Control valve with multiple actuators

Claim 1

A CONTROL VALVE COMPRISING A HOUSING HAVING A PRESSURE FLUID FLOW PASSAGE THERETHROUGH, APPLICATION MEANS MOVABLE IN SAID HOUSING AND CONTROLLING SAID FLOW PASSAGE, SAID APPLICATION MEANS DEFINING WITH SAID HOUSING AN EXPANSIBLE FLUID PRESSURE CHAMBER FOR SELECTIVE SUBJECTION TO THE ATMOSPHERE AND FLUID PRESSURE, FORCE APPLYING MEANS FOR SAID APPLICATION MEANS, SAID APPLICATION MEANS MOVABLE IN RESPONSE TO THE OPERATION OF SAID FORCE APPLYING MEANS TOWARD AN ACTUATED POSITION IN SAID FLOW PASSAGE ESTABLISHING PRESSURE FLUID FLOW THERETHROUGH WHEN SAID CHAMBER IS CONNECTED TO THE ATMOSPHERE AND SAID APPLICATION MEANS BEING MOVABLE INDEPENDENTLY OF THE OPERATION OF SAID FORCE APPLYING MEANS TOWARD ITS ACTUATED POSITION IN RESPONSE TO FLUID PRESSURE IN SAID CHAMBER UPON THE SUBJECTION THEREOF TO FLUID PRESSURE, AND RESILIENTLY URGED MEANS MOVABLE IN SAID HOUSING FOR DRIVING ENGAGEMENT WITH SAID APPLICATION MEANS AND DEFINING WITH SAID HOUSING ANOTHER EXPANSIBLE FLUID PRESSURE CHAMBER, SAID RESILIENTLY URGED MEANS BEING MOVABLE IN RESPONSE TO FLUID PRESSURE IN SAID OTHER CHAMBER LESS THAN A PREDETERMINED VALUE TO DRIVE SAID APPLICATION MEANS TOWARD ITS ACTUATED POSITION.