Hydrodynamic transmission control

Claim 1

IN A TRANSMITTING CONTROL SYSTEM, A COMBINATION KICKDOWN AND THROTTLE PRESSURE CONTROL VALVE COMPRISING A CASING HAVING AN AXIALLY EXTENDING VALVE RECEIVING BORE AND A PLURALITY OF PORTS PIERCING THE CASING AND CONNECTING TO AXIALLY SPACED PORTIONS OF SAID BORE, A KICKDOWN VALVE AND A THROTTLE PRESSURE CONTROL VALVE MOUNTED IN SPACED SERIES ARRANGEMENT WITHIN SAID VALVE BORE AND SHIFTABLE AXIALLY THEREOF INDEPENDENTLY AND COJOINTLY RELATIVE TO EACH OTHER, SHIFT OF SAID THROTTLE VALVE AXIALLY OF SAID BORE ACROSS A LINE PRESSURE FLUID INLET BETWEEN THE ENDS OF SAID BORE PROVIDING A METERED THROTTLE PRESSURE SUPPLY TO A THROTTLE PRESSURE CHAMBER INTERMEDIATE THE ENDS OF SAID VALVE BORE, A COMPRESSIBLE RESILIENT MEANS ARRANGED BETWEEN AND INTERCONNECTING SAID KICKDOWN AND THROTTLE PRESSURE CONTROL VALVES, A SLEEVE PISTON MOUNTED IN ONE END OF SAID BORE AND ARRANGED CONCENTRICALLY ABOUT SAID KICKDOWN VALVE FOR AXIAL MOVEMENT BOTH RELATIVE TO THE KICKDOWN VALVE AND CONJOINTLY THEREWITH, AND A VALVE OPERATOR ARRANGED TO ENGAGE AND SHIFT SAID KICKDOWN VALVE INDEPENDENTLY OF SAID PISTON FOR A PREDETERMINED MOVEMENT AFTER WHICH FURTHER MOVEMENT OF THE KICKDOWN VALVE BY SAID VALVE OPERATOR CAUSES CONJOINT MOVEMENT OF SAID KICKDOWN VALVE AND SAID PISTON, THE PORTION OF SAID BORE BETWEEN SAID SLEEVE PISTON AND SAID KICKDOWN VALVE BEING CONNECTED BY CONDUIT MEANS WITH A REACTION CHAMBER AT THE END OF SAID BORE ADJACENT SAID THROTTLE VALVE AND WITH THE THROTTLE PRESSURE CHAMBER OF SAID VALVE BORE TO APPLY THROTTLE PRESSURE THERETO, THE THROTTLE PRESSURE APPLIED TO SAID PISTON OPPOSING MOVEMENT OF THE THROTTLE VALVE TOWARDS SAID PISTON AND COOPERATING WITH THE THROTTLE PRESSURE IN SAID REACTION CHAMBER TO PERMIT NORMAL OPERATION OF SAID THROTTLE VALVE WITH MINIMUM EFFORT DUE TO THE OPPOSED FORCES APPLIED THERETO.