Patent ID: 8839817

Claim:
A valve, comprising: a housing having an inlet and an outlet, with a cavity therebetween; an outer valve member positioned within the cavity, the outer valve member having a pair of ports aligned about an outer valve member axis; an inner valve member positioned within the cavity, the inner valve member having a pair of ports aligned about an inner valve member axis; an actuation arrangement formed between the outer and inner valve members and operable to position the outer and inner valve members between a fully opened position to allow fluid flow through the valve and a fully closed position to prevent fluid flow through the valve, the actuation arrangement comprising a pair of gear rings axially spaced from one another along a valve member axis of the valve, each of the pair of gear rings circumscribing an interior space, the actuation arrangement further comprising a pair of pinions in meshed contact with one another and disposed within the interior space; and wherein the outer and inner valve member axes are generally transverse to one another in the fully closed position, and wherein the outer and inner valve member axes are coincident in the fully opened position.