Patent ID: 9732715
Date: 2017-08-15
CPC Classifications: F02M,Y10T

Claim:
1. A metering valve, comprising: a barrel having a central bore, a first opening in flow communication with the central bore, and a second opening in flow communication with the central bore; and a spool disposed for reciprocal motion within the central bore of the barrel, the spool including a tip surface, a metering edge, and at least one bore extending between a first orifice and a second orifice; wherein the spool is moveable between a closed position, wherein the tip surface engages a seat formed in a wall of the barrel to prevent fluid flow between the first opening and a first chamber of the central bore and the metering edge is disposed in the first chamber to prevent fluid flow between the first chamber and the second opening, and an opened position, wherein the tip surface is spaced apart from the seat to permit fluid flow between the first opening and the first chamber and through the at least one bore of the spool into a second chamber of the central bore to thereby equalize pressure of the fluid on the spool, and the metering edge is disposed in a flow path of the second opening to permit fluid flow between the first chamber and the second opening.