Hydraulic door lock for horizontal baler

Claim 1

IN A BALING APPARATUS, A HORIZONTAL BALING CHAMBER INCLUDING A HORIZONTALLY MOVABLE RAM AND FLUID PRESSURE MEANS TO EXERT INWARD FORCE ON SAID RAM TO COMPRESS MATERIAL IN SAID CHAMBER, A DOOR HINGED VERTICALLY TO THE END OF THE CHAMBER, A LONGITUDINALLY EXTENDING FLUID PRESSURE CYLINDER SECURED HORIZONTALLY TO THE SIDE OF THE CHAMBER OPPOSITE THE HINGED EDGE OF THE DOOR, A PISTON IN SAID CYLINDER HAVING AN EXTERNALLY PROJECTING PISTON ROD, SAID PISTON ROD HAVING AN EXPOSED END, A LOCKING ARM PIVOTED TO SAID EXPOSED END OF SAID PISTON ROD, A LOCKING BRACKET ON THE FREE VERTICAL EDGE OF THE DOOR, LOCKINGLY ENGAGEABLE BY SAID LOCKING ARM, A SOURCE, OF FLUID PRESSURE, A FLUID PRESSURE LINE CONNECTED TO SAID SOURCE, A FLUID RETURN LINE, CONDUIT MEANS INCLUDING A FIRST RESTRICTION CONNECTING SAID FLUID PRESSURE LINE TO THE END OF SAID CYLINDER ADJACENT THE DOOR, CONDUIT MEANS INCLUDING A MANUALLY OPERATED VALVE CONNECTING SAID FLUID PRESSURE LINE TO THE OPPOSITE END OF SAID CYLINDER, AND CONDUIT MEANS INCLUDING A SECOND RESTRICTION CONNECTING SAID OPPOSITE END OF THE CYLINDER TO SAID FLUID RETURN LINE. SAID RESTRICTIONS OFFERING EQUAL RESISTANCE TO FLOW THERETHROUGH IN EITHER DIRECTION WHEREBY WITH SAID VALVE OPEN, OUTWARD MOVEMENT OF SAID PISTON ROD WILL BE RETARDED BECAUSE OF THE RESISTANCE TO RETURN FLOW OF FLUID FROM SAID CYLINDER THROUGH SAID FIRST-NAMED CONDUIT MEANS CAUSED BY SAID FIRST RESTRICTION, THEREBY PREVENTING SUDDEN RELEASE OF SAID LOCKING ARM.