Patent ID: 9719600
Date: 2017-08-01
CPC Classifications: F15B,F16K,Y10T

Claim:
1. A valve comprising: a body having a first inlet, a second inlet and an outlet; a cage disposed within the body between the outlet and the first inlet, the cage comprising a first bore, having a first inner circumference, in fluid communication with the first inlet and a second bore, having a second inner circumference larger than the inner circumference of the first bore, disposed between, and in fluid communication with, the first inlet and the outlet, and a first annular ledge extending between the first bore and the second bore; a shuttle disposed in the body, the shuttle being movable within the body between a first position and a second position, wherein the first inlet is open and the second inlet is closed when the shuttle is in the first position, and wherein the first inlet is closed and the second inlet is open when the shuttle is in the second position, the shuttle comprising a first piston having a first outer circumference and a second piston, having a second outer circumference smaller than the first outer circumference, the second piston extending from the first piston in the direction of the first inlet and terminating at a first piston end; and a seal assembly disposed adjacent each inlet in a groove having opposed side walls, each seal assembly comprising a seal member with a V-shaped configuration; the first piston of the shuttle is selectively positionable in the second bore of the cage, to form a first circumferential orifice between the second inner circumference of the second bore and the first outer circumference of the first piston, and the second outer circumference of the second piston of the shuttle is spaced from the first inner circumference of the shuttle by a greater distance than the first outer circumference of the first piston is spaced from the second inner circumference of the cage.