Shock absorber with hydraulic stop

Claim 1

A HYDRAULIC DAMPER COMPRISING A CYLINDER, A PISTON SLIDABLE IN SAID CYLINDER AND DIVIDING IT INTO FIRST AND SECOND SPACES, A PISTON ROD AXIALLY ATTACHED TO SAID PISTON, AN END WALL ON SAID CYLINDER CLOSING SAID FIRST SPACE, A GLAND IN SAID END WALL, SAID PISTON ROD EXTENDING THROUGH SAID FIRST SPACE AND BEING SLIDABLE THROUGH SAID GLAND, SAID PISTON ROD HAVING A PASSAGE THEREIN, SAID PASSAGE BEING STRAIGHT AND EXTENDING AT AN OBLIQUE ANGLE TO THE AXIS OF SAID PISTON ROD, HAVING FIRST AND SECOND ENDS BOTH OPENING INTO THE LATERAL WALL OF SAID PISTON ROD AT OPPOSITE SIDES THEREOF, SAID FIRST END OPENING INTO THE WALL OF THE PISTON ROD AT A POINT AXIALLY DISPLACED FROM SAID PISTON IN THE DIRECTION OF SAID GLAND, WHEREBY THE COOPERATION OF SAID PASSAGE WITH SAID GLAND DEFINES A HYDRAULIC STOP LIMITING THE TRAVEL OF SAID PISTON IN SAID CYLINDER IN THE DIRECTION TOWARDS SAID END WALL, SAID PISTON HAVING THEREIN AN ANNULAR SPACE AROUND SAID PISTON ROD, AND SAID SECOND END OF SAID PASSAGE OPENING INTO SAID ANNULAR SPACE, A FIRST ONE-WAY VALVE IN SAID PISTON ALLOWING FLOW OF LIQUID UNDER PRESSURE FROM SAID SECOND SPACE TO SAID FIRST SPACE, A SECOND VALVE ALLOWING FLOW OF LIQUID UNDER PRESSURE FROM SAID ANNULAR SPACE TO SAID SECOND SPACE AND COMPRISING AT LEAST ONE ANNULAR RING-SHAPED SHIM, MEANS CLAMPING A PERIPHERAL EDGE OF SAID SHIM, AND RESILIENT MEANS URGING SAID SHIM TO CLOSED POSITION.