Valve with damping system

Claim 1

AN HYDRAULIC VALVE COMPRISING A BODY HAVING A CYLINDRICAL BORE THEREIN CLOSED AT ONE END, A PISTON RECIPROCABLE IN THE BORE BY SPRING FORCE AND HYDRAULIC PRESSURE, SAID PISTON CONTROLLING VALVE PORTS IN THE CYLINDER WALL OF THE BODY, A SPRING IN SAID ONE END OF THE BORE ARRANGED TO ACT IN COMPRESSION BETWEEN THE BODY AND THE PISTON, A RESILIENT DAMPER DISC INTERPOSED BETWEEN THE PISTON AND THE SPRING, SAID DISC BEING ADAPTED TO EXPAND DIAMETRICALLY UPON INCREASE IN AXIAL COMPRESSION INCIDENT TO INCREASED COMPRESSION OF THE SPRING, THERE BEING CLEARANCE FOR THE FLOW OF FLUID PAST THE DISC BETWEEN THE CYLINDER WALL AND THE PERIPHERY OF THE DISC IN THE CONDITION OF COMPRESSION PREVAILING IN ONE POSITION OF THE PISTON IN THE BORE, A SUPPORT DISC ON EACH SIDE OF THE RESILIENT DISC, ALIGNED OPENINGS THROUGH THE PISTON AND SAID DISC FOR THE THROUGH FLOW OF FLUID, AND A CHECK VALVE FOR CONTROLLING SUCH THROUGH FLOW, SAID CHECK VALVE COMPRISING A NOTCHED POPPET DISC DISPOSED IN A RECESS IN THE END FACE OF THE PISTON IMMEDIATELY ADJACENT THE RESILIENT DISC AND ADAPTED TO SEAT UPON THE SUPPORT DISC ADJACENT THE PISTON TO OBSTRUCT SUCH THROUGH FLOW.