Four-way ball valve
AssigneeWestinghouse Air Brake Company
InventorMichael T. Zoric
Life of this patent
Estimating the term…
Abstract
A four-way ball type valve including a spherical valve element operable to as many as four positions and which can be installed on a railway car in place of the branch pipe tee to eliminate the need for an angle cock at each end of the brake pipe and a brake control valve cut-out cock. The ball valve is functionally analogous to a rotary valve in cutting off the brake pipe at either end of the car without interrupting the brake control valve connection with the brake pipe, or in cutting out the brake control valve while establishing brake pipe continuity through the train.
Claims3
A four-way ball type valve device for selectively controlling communication between two or more ports formed therein, said valve device comprising:
- (a) a casing having at least three ports connectable to respective pipes;
- (b) a ball-shaped valve member having a first passageway extending diametrically therethrough and a branch passageway normal to and intersecting said first passageway, said valve member being rotatably disposed in said casing and selectively operable to a plurality of positions in each of which positions fluid pressure is communicated between two or more of said ports via said passageways in said valve member;
- and
- (c) a sealing element sealingly disposed between said casing and said valve member and having at least three openings therein registering with said ports in the casing, said sealing element having an inner surface contour complementing the outer surface of the ball-shaped valve member and providing sufficient clearance therebetween for permitting snug rotating action of the valve member therein and sufficient displacement thereof, responsively to fluid pressure in said passageways, for applying sealing pressure of the valve member against the cut-off port when only two of said ports are in communication with each other.
Dependencies are inferred from the claim text.