Combination shock absorber and selflevelling device

Claim 1

THE COMBINATION WITH RELATIVELY MOVABLE SPRINGSUPPORTED AND SUPPORTING MEMBERS RESPECTIVELY PROVIDED WITH SPRING SEATS RELATIVELY MOVABLE AND FIXED REGARDING RESPECTIVE MEMBERS OF A SPRING OPERATIVELY ENGAGED WITH THE SPRING SEATS AND AT LEAST CONTRIBUTING TO THE SUPPORT OF THE SUPPORTED MEMBER FROM THE SUPPORTING MEMBER, MEANS FOR GUIDING THE MOVABLE SPRING SEAT FOR MOVEMENT IN A DIRECTION TO INCREASE AND DECREASE SPRING BIAS, A RESERVOIR CONTAINING HYDRAULIC LIQUID, A PUMP COMPRISING A PUMP CYLINDER AND PISTON, THE CYLINDER HAVING VALVED LIQUID INTAKE MEANS CONNECTING IT WITH THE RESERVOIR AND BEING PROVIDED WITH A LATERAL RETURN PORT COMMUNICATING WITH THE RESERVOIR AND FOR WHICH THE PISTON AND CYLINDER HAVE COOPERATING PARTS CONSTITUTING A VALVE, A RAM COMPRISING A RAM CYLINDER AND A RAM PISTON CONNECTED BETWEEN THE MOVABLE SPRING SEAT AND ITS RESPECTIVE MEMBER FOR EFFECTING DISPLACEMENT OF THE MOVABLE SPRING SEAT IN A DIRECTION TO INCREASE SPRING BIAS, MEANS COMPRISING A DUCT HAVING A CHECK VALVE AND PROVIDING COMMUNICATION BETWEEN THE PUMP CYLINDER AND THE RAM CYLINDER, WHEREBY MOVEMENT OF THE PUMP PISTON IN THE PUMP CYLINDER WILL TEND TO DISPLACE LIQUID FROM THE RESERVOIR INTO THE RAM CYLINDER FOR THE MOVEMENT OF THE MOVABLE SPRING SEAT AWAY FROM ITS RESPECTIVE MEMBER, AND MEANS FOR LEAKING LIQUID FROM THE RAM CYLINDER TOWARD THE RESERVOIR AT A RATE LESS THAN THE RATE AT WHICH LIQUID IS PUMPED FROM THE RESERVOIR TO THE RAM CYLINDER WHEN THE VALVE CONSTITUTED BY SAID PUMP PISTON AND SAID PUMP CYLINDER PORTS IS CLOSED.