Fluid control devices

Claim 1

IN A FLUID CONTROL DEVICE, A FLUID AMPLIFIER HAVING A NOZZLE FOR GENERATING A JET OF FLUID, FLUID RECEIVING JET DEFLECTION CONTROL MEANS, AND JET RECEIVING LOAD PASSAGES; AN ADDITIONAL PASSAGE CONNECTED IN COMMUNICATION WITH SAID LOAD PASSAGES, FLUID SUPPLY MEANS FOR SUPPLYING PRESSURE FLUID TO SAID ADDITIONAL PASSAGE AND TO SAID FLUID AMPLIFIER FROM A COMMON FLUID PRESSURE SOURCE INCLUDING SUPPLY PASSAGE MEANS LEADING TO SAID ADDITIONAL PASSAGE AND CONNECTING SAID CYLINDER ADDITIONAL PASSAGE IN COMMUNICATION WITH SAID CONTROL MEANS AND WITH SAID NOZZLE SO THAT FLUID SUPPLIED TO SAID CONTROL MEANS IS DERIVED FROM FLUID SUPPLIED TO SAID ADDITIONAL PASSAGE, A PAIR OF VALVES ADJUSTABLY POSITIONED IN SAID SUPPLY PASSAGE MEANS TO PERMIT VARIATION OF THE AMOUNT OF FLUID CONDUCTED FROM SAID ADDITIONAL PASSAGE TO SAID JET DEFLECTION CONTROL MEANS, CONTROL PASSAGE MEANS CONNECTING SAID JET DEFLECTION CONTROL MEANS IN COMMUNICATION WITH ATMOSPHERE, AND MEANS FOR CONTROLLABLY RESTRICTING SAID CONTROL PASSAGE MEANS.