Hydraulic shock absorber for vehicles

Claim 1

A TELESCOPIC SHOCK ASBORBER COMPRISING A CYLINDER ADAPTED TO BE FILLED WITH OIL, AND HAVING AN OPENING AT ONE END, A PISTON SLIDABLE WITHIN SAID CYLINDER ALONG THE INNER WALL THEREOF AND DIVIDING SAID CYLINDER INTO A PAIR OF WORK CHAMBERS, A PISTON ROD CONNECTED TO SAID PISTON AND SLIDABLY EXTENDING THROUGH SAID OPENING, AT LEAST ONE THROTTLING BORE OF VARYING CROSS-SECTIONAL AREA EXTENDING THROUGH SAID PISTON AND CONNECTING SAID WORK CHAMBERS FOR PASSING THE OIL AT A HIGH VELOCITY FROM ONE WORK CHAMBER TO THE OTHER UPON A MOVEMENT OF SAID PISTON IN SAID CYLINDER, AN ELASTIC COMPENSATING CHAMBER ADAPTED TO RECEIVE THE OIL EXPELLED FROM SAID CYLINDER BY THE MOVEMENT OF SAID PISTON ROD THEREIN AND BY THE THERMAL EXPANSION OF THE OIL, WITHIN SAID CYLINDER, AND A CONDUIT WITHIN THE PISTON BRANCHING OFF FROM A POINT OF SAID THROTTLING BORE AT WHICH THE PRESSURE IS REDUCED TO A PRESSURE LOWER THAN THAT IN OTHER PARTS OF THE BORE BY VIRTUE OF THE REDUCED CROSS-SECTIONAL AREA, SAID CONDUIT CONNECTING SAID THROTTLING BORE WITH SAID COMPENSATING CHAMBER.