Patent ID: 6539974
Filing Date: 2003-04-01
Classification: F04B,F16K,Y10T

Abstract:
A valve which comprises:a valve seat that includes essentially ring-shaped, concentrically arranged channels for passage of a controlled medium therethrough, a catcher spaced from said valve seat, said catcher including a base plate formed of radial cross portions and circumferential cross portions that define flow-off channels therethrough, and outer and inner guide extensions which extend from said radial cross portions of said base plate toward said valve seat, and a valve plate assembly which is movably located between said valve seat and said base plate of said catcher, said valve plate assembly including a plurality of concentric ring plates that each include sloped sealing surfaces for positioning in passage channels of said valve seat so as to block said passage channels, and a plurality of concentric support rings between said ring plates and said base plate of said catcher, each of said support rings being biased towards said valve seat and each support ring overlapping two ring plates, said support plates and said ring plates being respectively guided in lift and return movement between said valve seat and said base plate of said catcher by one of said inner and outer guide extensions.