초록 ▼

A device for controlling flow of a pressurized fluid including conduit means for conveying the fluid without substantial directional deviation in the direction of flow. Metering means is disposed in said conduit means for control of the flow of said fluid. A throttle piston is movable into and out o

A device for controlling flow of a pressurized fluid including conduit means for conveying the fluid without substantial directional deviation in the direction of flow. Metering means is disposed in said conduit means for control of the flow of said fluid. A throttle piston is movable into and out of the conduit means and is responsive to the flow of the fluid for maintaining a constant pressure drop across the metering means for any given setting of the metering means. The metering means includes a pierced cylindrical valve body rotatable on an axis transverse to the axis of the conduit means with two scale index structures attached thereto for indicating adjustment of flow rates appropriate to either of two source pressures.

대표청구항 ▼

A device for controlling the flow of a fluid delivered from a pressurized source comprising: a housing having a straight bore extending therethrough; a manually settable metering valve disposed in said bore, to select a flow rate; a piston movable into and out of said bore downstream of said meterin

A device for controlling the flow of a fluid delivered from a pressurized source comprising: a housing having a straight bore extending therethrough; a manually settable metering valve disposed in said bore, to select a flow rate; a piston movable into and out of said bore downstream of said metering valve; and first control means disposed in said housing in fluid communication with said bore upstream and downstream of said metering valve and second control means disposed in said housing in fluid communication with said bore upstream of said metering valve by way of said first control means and in direct communication with said bore downstream of said metering valve for driving said piston to maintain the pressure drop across said metering valve at a predetermined value.