Hydraulic draft gear for railway cars

Claim 1

IN A RAILWAY CAR HAVING A CENTER SILL MEMBER AFFIXED TO THE BODY OF THE CAR AND PROVIDED WITH A DRAFT GEAR POCKET, AND DRAFT GEAR ASSEMBLY DISPOSED IN SAID DRAFT GEAR POCKET AND COMPRISING: (A) A DRAFT GEAR YOKE HAVING TWO SPACED-APART TRAVEL IN SAID DRAFT GEAR POCKET REATIVE TO THE CENTER SILL MEMBER RESPONSIVELY TO DRAFT AND BUFF FORCES EXERTED THEREON, SAID YOKE HAVING TWO SPACED-APART ELONGATED SLOTS, (B) A DRAFT GEAR DEVICE DISPOSED IN ONE OF SAID SLOTS AND COOPERATIVE WITH THE CENTER SILL MEMBER UPON EXERTION OF DRAFT AND BUFF FORCES ON SAID DRAFT GEAR YOKE TO ABSORB ENERGY TO A DEGREE PROPORTIONAL TO THE DISTANCE OF TRAVEL OF SAID DRAFT GEAR YOKE, (C) A FLUID PRESSURE CONTROLLED DEVICE SECURED TO THE CENTER SILL MEMBER IN A CERTAIN ALIGNED POSITION AND HAVING A PISTON AND PISTON ROD ACTUATED RESPONSIVELY TO A PREDETERMINED FLUID PRESSURE TO A POSITION IN WHICH THE PISTON ROD PROJECTS INTO THE OTHER OF SAID SLOTS IN SAID DRAFT GEAR YOKE WHEREBY THE PISTON ROD COOPERATES WITH THE YOKE TO CONTROL THE TRAVEL OF THE YOKE BETWEEN SAID CERTAIN MAXIMUM TRAVEL AND A CHOSEN MINIMUM TRAVEL AND THEREBY THE ENERGY ABSORBED BY SAID DRAFT GEAR DEVICE, (D) BIASING MEANS EFFECTIVE TO NORMALLY BIAS SAID PISTON AND PISTON ROD TO A POSITION IN WHICH THE PISTON ROD IS DISPOSED OUT OF THE OTHER OF SAID SLOTS IN SAID DRAFT GEAR YOKE TO PROVIDE FOR MAXIMUM TRAVEL OF SAID DRAFT GER YOKE, AND (E) A BRAKE PIPE OF A FLUID PRESSURE BRAKE SYSTEM, AN INCEASE IN THE PRESSURE IN WHICH IS EFFECTIVE TO CAUSE ACTUATION OF SAID PISTON AND PISTON ROD OF SAID FLUID PRESSURE CONTROLLED DEVICE AGAINST THE BIASING FORCE OF SAID BIASING MEANS TO THE POSITION IN WHICH THE PISTON ROD PROJECTS INTO THE OTHER OF SAID SLOTS IN SAID DRAFT GEAR YOKE TO PROVIDE FOR MINIMUM TRAVEL OF SAID GEAR YOKE AND A DECREASE IN PRESSURE IN WHICH IS EFFECTIVE TO CAUSE ACTUATION OF SAID PISTON AND PISTON ROD BY SAID BIASING MEANS TO THE POSITION IN WHICH THE PISTON ROD IS DISPOSED OUT OF THE OTHER OF SAID SLOTS IN SAID DRAFT GEAR YOKE TO PROVIDE FOR MAXIMUM TRAVEL OF SAID SHAFT GEAR YOKE.