Metering valve

In a fuel metering valve assembly comprising housing means defining a chamber adapted to contain fuel under pressure, valve seat means on one wall of said chamber defining a valve seat surface and a plurality of outlet passage bores extending through said seat means symmetrically disposed about a central axis, valve poppet means having a poppet surface mounted in said chamber for reciprocatory movement along said axis between a valve-open position wherein said head surface is spaced from said seat surface to accommodate flow from said chamber into said bores and a valve-closed position wherein said valve poppet surface is engaged with said valve seat surface in overlying relationship with said valve seat bores to block flow from said chamber into said bores, and means for cyclically driving said valve poppet means between said open and closed positions;

• the improvement wherein said valve poppet surface and said valve seat surface include opposed accurately flat planar surfaces lying in parallel planes, the planar surface of said valve seat surface having a plurality of recesses therein and a plurality of annular sealing portions constituting a portion of the planar surface of said seat surface and respectively extending around each of said valve seat bores to isolate said valve seat bores from fluid communication with said recesses and said chamber when the planar surfaces of said valve poppet means and a valve seat means are engaged with each other.