Valve with axial screw assembly

Claim 1

A valve for upwardly discharging an annular stream of liquid in adjustable volume at low pressure, which valve includes: a cylindrical metal valve body for disposition as a riser cylinder with a lower upstream end for intake of liquid at low pressure, and an upwardly opening discharge end, said upper discharge end including an annular valve seat shoulder around its periphery; a spider assembly coaxially disposed within said valve body, said spider assembly including: at least three substantially identical formed sheet metal segments, formed of a metal readily weldable to the metal of said valve body, each segment consisting of a arcuate portion coaxial with the axis of said valve body, and a pair of radial arms extending from each end of said arcuate section to the internal wall surfaces of said valve body, said segments in combination providing a bushing support tube coaxial with said valve body, said tube being spaced at an elevation below said valve seat shoulder and said arms sweeping upwardly and outwardly to make contact with the internal walls of said valve body closely adjacent to the underside of said seating shoulder; welded attachment of said segments to said valve body and to each other; an internally threaded bushing supported in said bushing tube, said bushing being provided with outer surface wall projections and recesses for nesting with said spider assembly in said bushing support tube in a mating assembly therewith retaining said bushing against this assembly and against rotations; an axial screw threadably received in said bushing, said screw extending vertically above said discharge opening of said valve body, and said screw being provided with a valve handle rotation means at its upper end; and a horizontally disposed closure plate coaxially retained on said screw below said handle, said closure plate being adapted to seat on said annular valve shoulder to close said valve, or to be upwardly retracted by the unthreading of said screw to a position spaced above said valve seat for the measured flow of liquid from said valve.