Cushioned cylinder arrangement having a combined check valve and needle valve

Claim 1

IN A FLUID PRESSURE OPERATED CYLINDER ASSEMBLY COMPRISING A CYLINDER, A HEAD ELEMENT ATTACHED TO ONE END OF SAID CYLINDER, A PISTON RECIPROCABLY DISPOSED IN SAID CYLINDER, A COMBINATION CYLINDRICAL AIR INLET AND AIR EXHAUST CAVITY DEFINED IN SAID HEAD ELEMENT SUBSTANTIALLY CONCENTRIC WITH SAID CYLINDER AND OPENING CENTRALLY THEREINTO VIA WHICH AIR IN SAID CYLINDER DISPLACED BY SAID PISTON DURING ITS INITIAL MOVEMENT TOWARDS SAID ELEMENT IS EXHAUSTED AND VIA WHICH AIR UNDER PRESSURE MAY BE ADMITTED TO THE CYLINDER FOR MOVEMENT OF SAID PISTON AWAY FROM SAID ELEMENT, A CYLINDRICAL ELEMENT SUBSTANTIALLY CONCENTRICALLY DISPOSED TO ONE SIDE OF SAID PISTON AND MOVABLE THEREWITH FOR TELESCOPIC INSERTION INTO SAID CAVITY WITH SLIGHT CLEARANCE SERVING TO RESTRICT THE EGRESS OF FLUID FROM SAID CYLINDER AS THE PISTON APPROACHES THE HEAD, A BORE IN SAID HEAD HAVING ONE END OPENING EXTERIORLY OF SAID HEAD AND THE OTHER END OPENING IN SAID CAVITY, AND A FIRST PASSAGE MEANS IN SAID HEAD COMMUNICATING SAID BORE INTERMEDIATE ITS ENDS WITH THE FACE OF SAID HEAD AND DISPOSED INTERIORLY OF SAID CYLINDER, AN ADJUSTABLE CUSHION MECHANISM, COMPRISING: