Hydraulically operated clutch and motor controls for vehicles

Claim 1

A HYDRAULIC CLUTCH CONTROL DEVICE FOR AN AUTOMOBILE VEHICLE COMPRISING A FLUID PRESSURE POWER CYLINDER FOR OPERATING THE CLUTCH, AN OPERATING AND SPEED-SELECTING CONTROL SLIDE-VALVE CONTROLLING A SOURCE OF FLUID-PRESSURE, A CORRECTOR LOCATED BETWEEN SAID POWER CYLINDER AND SAID CONTROL SLIDE-VALVE COMPRISING A REGULATING SLIDE-VALVE, MEMBERS CONTROLLED BY THE SPINDLE OF THE ACCELERATOR BUTTERFLY-VALVE CONTROLLING SAID REGULATING SLIDE-VALVE TO ADAPT THE SPEED OF RE-CLUTCHING TO THE SPEED OF THE VEHICLE, A PIVOTED LEVER CONTROLLED BY SAID MEMBERS, A SPRING COOPERATING WITH SAID LEVER WHOSE TENSION IS A FUNCTION OF THE POSITION OF SAID BUTTERFLY-VALVE SPINDLE, SAID REGULATING SLIDE-VALVE HAVING A BORE, A SET OF TWO SPACED VALVES IN SAID BORE, ONE OF SAID VALVES MOVING WITHOUT CLEARANCE IN SAID MORE AND THE OTHER VALVE WITH A PREDETERMINED CLEARANCE TO PRODUCE A LEAKAGE, SAID SET SUBJECTED ON ONE SIDE TO THE FLUID-PRESSURE EXISTING IN SAID POWER CYLINDER AND ON THE OTHER SIDE TO THE ACTION OF SAID LEVER, A CONNECTING CONDUIT CONNECTED BY SAID CONTROL SLIDE-VALVE TO A SOURCE OF HIGH PRESSURE OR TO A SOURCE OF LOW PRESSURE; A CHAMBER LOCATED ADJACENT ONE OF SAID SET OF VALVES, A CONDUIT CONNECTING SAID POWER CYLINDER WITH SAID CHAMBER, AN INTERNAL CONNECTION BETWEEN SAID CHAMBER AND THE SPACE IN SAID BORE BETWEEN SAID SET OF VALVES; SAID INTERNAL CONNECTION BEING CLOSED BY SAID VALVES AFTER A FIRST MOVEMENT OF THE CLUTCH AND THE FINAL CLUTCHING MOVEMENT BEING CONTROLLED BY THE LEAKAGE OF FLUID ABOUT SAID VALVE WITH A PREDETERMINED LEAKAGE.