Arrangement for controlling the brake systems of trailers or the like

Abstract

Abstract AN ARRANGEMENT FOR CONTROLLING THE BRAKE SYSTEM OF A TRAILER FROM THE TOWING VEHICLE AND FOR SIMULTANEOUSLY CONTROLLING THE FLOW OF A PRESSURIZED FLUID TO ONE OR MORE CONSUMERS UTILIZES A VALVE ASSEMBLY HAVING A HOUSING FOR A SHUTTLE WHICH IS MOVABLE BETWEEN SEVERAL POSITIONS TO THEREBY REGULATE THE FLOW OF PRESSURIZED FLUID FROM AN INLET TO A FIRST OUTLET FOR ONE OR MORE CONSUMERS, A SECOND OUTLET FOR THE HYDRAULIC CYLINDER OR CYLINDERS OF THE BRAKE SYSTEM FOR THE TRAILER, AND THROUGH A PASSAGE WHEREIN A CONTROL FLUID STREAM FLOWS FROM THE INLET TO A THIRD OUTLET FOR RECIRCULATION TO THE SOURCE OF FLUID. THE POSITIONS OF THE SHUTTLE CAN BE CHANGED BY A PILOT VALVE UNIT WHICH IS CONTROLLED BY A MANUALLY OPERABLE LEVER OR BY A HYDRAULIC PISTON WHICH IS SHIFTABLE IN RESPONSE TO CHANGES OF FLUID PRESSURE IN THE BRAKE SYSTEM OF THE TOWING VEHICLE. THE RATE OF FLOW OF PRESSURIZED FLUID TO THE CONSUMER OR CONSUMERS CAN BE CHANGED WHILE THE BRAKE SYSTEM OF THE TRAILER IS SEALED FROM THE INLET, AND SUCH FLOW IS REDUCED OR TERMINATED WHEN THE BRAKE SYSTEM OF THE TRAILER RECEIVES PRESSURIZED FLUID. THE PILOT VALVE UNIT CAN ESTABLISH OR TERMINATE COMMUNICATION BETWEEN THE SECOND AND THIRD OUTLETS.

Inventors

• 👤 F Hoefer

Bibliographic Details