Vehicle suspension systems

Claim 1

AN HYDRO-PNEUMATIC SUSPENSION ASSEMBLY FOR CONNECTION BETWEEN AN AXLE AND A FRAME OF A VEHICLE COMPRISING A CYLINDER HAVING AN END CLOSURE, A PISTON RECIPROCABLE SAID CYLINDER AND FORMING WITH THE CYLINDER AND WITH SAID END CLOSURE A WORKING CHAMBER, A PRESSURE CHAMBER TO RECEIVE GAS UNDER PRESSURE, MEANS DEFINING A PASSAGE INTERCOMMUNICATING SAID WORKING CHAMBER AND SAID PRESSURE CHAMBER, A VALVE OPERATING MEMBER, MEANS PERMITTING RECIPROCATING MOVEMENT OF SAID PISTON RELATIVE TO SAID VALVE OPERATING MEMBER, MEANS YIELDABLY HOLDING SAID VALVE OPERATING MEMBER RELATIVE TO SAID PISTON, MEANS IN SAID END CLOSURE FORMING AN INLET TO AND AN OUTLET FROM SAID WORKING CHAMBER, A VALVE CONTROLLING SAID INLET AND OUTLET AND ENGAGEABLE BY SAID VALVE OPERATING MEMBER, SAID VALVE INCLUDING A PASSAGE INTERCONNECTING SAID WORKING CHAMBER AND SAID OUTLET AND BEING CLOSABLE BY SAID VALVE OPERATING MEMBER ON ENGAGEMENT WITH SAID VALVE, RESILIENT MEANS BIASSING SAID VALVE TO A FIRST POSITION IN WHICH SAID INLET IS CLOSED AND SAID OUTLET IS OPEN, AND SAID RESILIENT MEANS YIELDING ON ENGAGEMENT OF SAID VALVE BY SAID VALVE OPERATING MEMBER ON ENTRY OF SAID PISTON INTO SAID WORKING CHAMBER TO ALLOW SAID VALVE TO MOVE INTO A SECOND POSITION IN WHICH SAID OUTLET IS CLOSED AND SAID INLET IS OPEN, SAID MEANS YIELDABLY HOLDING SAID VALVE OPERATING MEMBER YIELDING AS SAID VALVE APPROACHES SAID SECOND POSITION AND WHEN SAID PISTON MOVES RELATIVELY TO SAID VALVE OPERATING MEMBER.