Valve structure

Claim 1

A VALVE COMPRISING A VALVE BODY HAVING A SUBSTANTIALLY TUBULAR INTERNAL WALL SURFACE AND A TRANSVERSE WALL SURFACE AT LEAST PARTLY DEFINING A VALVE CHAMBER, SAID BODY HAVING A FLUID INLET PORT AND A FLUID OUTLET PORT COMMUNICATING WITH SAID CHAMBER, ONE OF SAID PORTS BEING DISPOSED IN COMMUNICATING WITH SAID TUBULAR WALL AND THE OTHER OF SAID PORTS BEING DISPOSED IN COMMUNICATION WITH SAID TRANSVERSE WALL, AN AXIALLY MOVABLE VALVE MEMBER RECEIVED IN SAID VALVE CHAMBER IN COOPERATIVE ASSOCIATION WITH THE PORT IN SAID TRANSVERSE WALL, AND FLOW GUIDE MEANS DISPOSED IN ENCOMPASSING RELATION WITH SAID VALVE MEMBER AND ITS ASSOCIATED PORT, SAID FLOW GUIDE MEANS AND SAID WALL SURFACES JOINTLY DEFINING A FLUID PASSAGEWAY HAVING FIRST AND SECOND PASSAGEWAY PORTIONS EXTENDING IN OPPOSITE DIRECTIONS FROM SAID INLET PORT AND SAID PORTIONS BEING OF CONTINUOUSLY AND SMOOTHLY DIMINISHING CROSS-SECTION AREA IN THE DIRECTION OF FLUID FLOW THERETHROUGH.