Orifice valve assembly

Abstract

An orifice valve assembly which may be utilized to control the flow of a fluent material, such as powdered magnesium, propelled by gas under pressure, the valve controlling the flow in a linear manner. The valve includes a valve body having first and second adjacent concentric bores, the first bore being of a larger diameter than the second bore, and a cross-bore intersecting the first bore, the cross-bore having a cylindrical portion which intersects the first bore and frusto-conical inlet and outlet portions to either side of the cylindrical portion. A rotatable valve body is mounted within the first and second bores, the valve body having cylindrical first and second portions of a diameter just slightly less than the first and second bores of the cylindrical body, the first bore being provided with a circumferential groove which has a rounded bottom surface of a radius equal to the radius of the intersecting cylindrical portion, and which is of a crescent-shaped cross-section when viewed in a section transverse to the axis of the cylindrical body. Means are provided to rotate the valve core within the valve body.

Dependencies are inferred from the claim text.