Metering Check Valve for Fluid Injection

Abstract

A flow meter check valve is described. The flow meter check valve can be connected to the discharge side of a reciprocating action fluid pump to monitor, analyze, calculate and be used to control the flow of liquid through the pump. Embodiments of the flow meter check valve combine aspects of a backflow check valve with the metering capability of a rotameter variable area flow device. The flow meter check valve features a tapered tube and a float. The position of the float within the tube is proportional to the forward fluid flow rate. A valve stem with a marker is attached to the float so that it moves in a direct linear motion proportional to the volume of fluid delivered. The position of the marker is detected by an external sensing mechanism.

Dependencies are inferred from the claim text.