Variable Control Port for Fluidic Control Device

Volume and velocity of control flow independently adjustable. In proposed device rotatable D-shaped control sector throttles down control port or open it completely and set to any intermediate control-port crosssectional area. Although adjustment affects volume and control-port head loss, volume and velocity controlled independently by also adjusting fluidsupply pressure. Allows adjustment to wider range of control conditions and ability to maximize control efficiency. Fluidic control theory suggests possibility of improvement in control ratio of at least 2:1 over conventional devices.