Hydraulic-decelerator system

Claim 1

A HYDRAULIC DECELERATOR SYSTEM FOR AN AUTOMOTIVE VEHICLE PROVIDED WITH A SHAFT COUPLED WITH WHEELES OF SAID VEHICLE, SAID SYSTEM COMPRISING: A HYDRAULIC DECELERATOR OPERATIVELY CONNECTED WITH SAID SHAFT AND HAVING A ROTATING MEMBER MOUNTED THEREON AND A RELATIVELY STATIONARY MEMBER CONNECTED WITH THE VEHICLE CHASSIS FOR REDUCING THE ROTARY SPEED OF SAID SHAFT UPON THE APPLICATION OF HYDRAULIC FLUID UNDER PRESSURE TO SAID DECELERATOR; FLUIDRESPONSIVE FRICTION-BRAKE MEANS IN SAID DECELERATOR ENERGIZABLE WITH FLUID UNDER PRESSURE FOR FRICTIONALLY INTERCONNECTING SAID MEMBERS AND BRINGING SAID SHAFT TO A STANDSTILL; AND BRAKE-OPERATING MEANS ON SAID VEHICLE FOR SUPPLYING FLUID UNDER PRESSURE TO SAID FRICTION-BRAKE MEANS AND SAID HYDRAULIC DECELERATOR, THEREBY ACTUATING SAME, SAID BRAKE-OPERATING MEANS INCLUDING DIFFERENTIAL-VALVE MEANS PROVIDED WITH A PASSAGE, A VALVE BODY CO-OPERATING WITH SAID PASSAGE FOR SELECTIVELY BLOCKING AND UNBLOCKING SAME, MASTER-CYLINDER MEANS FOR APPLYING FLUID UNDER PRESSURE TO SAID DIFFERENTIAL-VALVE MEANS, DECELERATORENERGIZING MEANS RESPONSIVE TO THE PRESSURE TO FLUID SUPPLIED BY SAID MASTER-CYLINDER MEANS AND FLOWING THROUGH SAID PASSAGE FOR APPLYING HYDRAULIC FLUID UNDER PRESSURE BY SAID DECELERATOR, CONTROL MEANS RESPONSIVE TO THE DEGREE OF HYDRAULIC BRAKING BY SAID DECELERATOR OF SAID SHAFT FOR THE SELECTIVELY DISPLACING OF SAID VALVE BODY RELATIVELY TO SAID PASSAGE, AND CONDUIT MEANS CONNECTING SAID FLUID RESPONSIVE FRICTION-BRAKE MEANS WITH SAID DIFFERENTIAL-VALVE MEANS FOR ENERGIZATION OF SAID FRICTIONBRAKE MEANS IN INVERSE RELATIONSHIP TO THE DEGREE OF HYDRAULIC BRAKING OF SAID SHAFT BY SAID DECELERATOR, THEREBY MAINTAINING THE TOTAL BRAKING FORCE APPLIED TO SAID VEHICLE BY BOTH SAID HYDRAULIC DECELERATOR AND SAID FRICTION-BRAKE MEANS SUBSTANTIALLY CONSTANT FOR ALL SHAFT SPEEDS AT A GIVEN PRESSURE WITHIN SAID MASTER-CYLINDER MEANS.