Impact energy absorbing mechanism for railway vehicles

Claim 1

A MECHANISM FOR ABSORBING THE ENERGY OF AN IMPACT APPLIED TO THE COUPLER OF A RAILWAY VEHICLE HAVING A BODY COMPRISING, A CENTER SILL STRUCTURE EXTENDING LONGITUDINALLY OF SAID BODY AND SECURED THERETO, AN AUXILIARY SILL STRUCTURE INCLUDING TRANSVERSELY SPACED MEMBERS EXTENDING LENGTHWISE WITHIN SAID CENTER SILL STRUCTURE AND THROUGHOUT THE LENGTH OF THE VEHICLE BODY AND PROJECTING BEYOND THE ENDS THEREOF IN THE NEUTRAL POSITION OF THE AUXILIARY SILL STRUCTURE, A COUPLER AND A STEM EXTENDING INTO A FIRST END OF THE AUXILIARY SILL STRUCTURE, A SECOND COUPLER AND A STEM EXTENDING INTO THE SECOND END OF THE AUXILIARY SILL STRUCTURE, A FIRST CENTER POST STRUCTURE SECURED TO THE CENTER SILL STRUCTURE AND POSITIONED BETWEEN SAID MEMBERS, A CYLINDER ARRANGED WITH ITS AXIS LONGITUDINALLY OF SAID VEHICLE BODY AND POSITIONED BETWEEN SAID MEMBERS, LIQUID WITHIN SAID CYLINDER, A PISTON MOUNTED FOR MOVEMENTS WITHIN SAID CYLINDER, STOP MEANS SECURED TO THE CENTER SILL STRUCTURE EXTENDING BETWEEN SAID MEMBERS AND POSITIONED TO ENGAGE SAID CYLINDER, A PISTON ROD CARRIED BY SAID PISTON EXTENDING FROM THE CYLINDER WITH ITS FREE END IN ABUTTING RELATIONSHIP WITH SAID CENTER POST STRUCTURE, A SECOND CENTER POST STRUCTURE SECURED TO THE CENTER SILL STRUCTURE AND POSITIONED BETWEEN SAID MEMBERS, A SECOND CYLINDER ARRANGED WITH ITS AXIS LONGITUDINALLY OF SAID VEHICLE BODY AND POSITIONED BETWEEN SAID MEMBERS, LIQUID WITHIN THE SECOND CYLINDER, A SECOND PISTON MOUNTED FOR MOVEMENTS WITHIN THE SECOND CYLINDER, STOP MEANS SECURED TO SAID CENTER SILL STRUCTURE EXTENDING BETWEEN SAID MEMBERS AND POSITIONED TO ENGAGE THE SECOND CYLINDER, MEANS COUPLING THE RESPECTIVE STEMS TO THE AUXILIARY SILL STRUCTURE TO MOVE THE AUXILIARY SILL STRUCTURE LONGITUDINALLY RELATIVE TO THE CENTER SILL STRUCTURE UPON APPLICATION OF AN IMPACT TO EITHER OR BOTH COUPLERS, A PISTON ROD CARRIED BY THE SECOND PISTON EXTENDING FROM THE SECOND CYLINDER WITH ITS FREE END IN ABUTTING RELATIONSHIP WITH THE SECOND CENTER POST STRUCTURE, MEANS INCLUDING LUGS CARRIED BY THE AUXILIARY SILL STRUCTURE FOR MOVING THE FIRST PISTON RELATIVE TO THE FIRST CYLINDER DURING RELATIVE MOVEMENT OF THE AUXILIARY SILL STRUCTURE AND THE CENTER SILL STRUCTURE, MEANS INCLUDING LUGS CARRIED BY THE AUXILIARY SILL STRUCTURE FOR MOVING THE SECOND CYLINDER RELATIVE TO THE SECOND PISTON UPON RELATIVE MOVEMENT OF THE AUXILIARY SILL STRUCTURE RELATIVE TO THE CENTER SILL STRUCTURE, LUGS CARRIED BY SAID AUXILIARY SILL STRUCTURE IN ABUTTING RELATIONSHIP WITH THE FIRST CYLINDER, MEANS INCLUDING LUGS CARRIED BY THE AUXILIARY SILL STRUCTURE FOR MOVING THE SECOND PISTON RELATIVE TO THE SECOND CYLINDER DURING OPPOSITE RELATIVE MOVEMENT OF THE AUXILIARY SILL STRUCTURE AND CENTER SILL STRUCTURE, AND MEANS METERING MOVEMENT OF THE LIQUID WITHIN EACH CYLINDER DURING RELATIVE MOVEMENT OF THE RESPECTIVE PISTON AND CYLINDER.