Ratio control system for toroidal transmission

Claim 1

A CONTROL SYSTEM FOR VARIABLE SPEED TRANSMISSIONS HAVING CO-AXIAL INPUT AND OUTPUE MEMBERS WITH FACING TORIC SURFACES AND A PLURALITY OF CIRCUMFERENTIALLY-SPACED ROLLERS DISPOSED BETWEEN AND IN DRIVING CONTACT WITH SAID SURFACES FOR TRANSMITTING TORQUE FROM THE INPUT MEMBER TO THE OUTPUT MEMBER, SUPPORT MEANS FOR EACH ROLLER INCLUDING A PIVOT SHAFT PROVIDING FOR SPEED-RATIO CHANGING PIVOTAL MOVEMENT OF SAID ROLLERS ACROSS SAID TORIC SURFACES, EACH SAID ROLLER PIVOT SHAFT BEING SUPPORTED FOR TRANSLATIONAL MOVEMENT ALONG ITS AXIS FOR INITIATING SPEEDRATIO PIVOTAL MOVEMENT OF SAID ROLLERS, SAID CONTROL SYSTEM COMPRISING; CAM MEANS CONNECTED TO ONE OF THE ROLLER PIVOT SHAFTS FOR PIVOTAL AND TRANSLATIONAL MOVEMENT THEREWITH, MEANS INCLUDING VALVE MEANS FOR APPLYING A FLUID PRESSURE FORCE AXIALLY AGAINST SAID ROLLER PIVOT SHAFTS SUCH THAT CHANGES IN THE RELATIVE MAGNITUDE OF THE FLUID PRESSURE FORCE ON EACH ROLLER PIVOT SHAFT OR THE TORIC SURFACE TRACTION FORCES ON ITS ASSOCIATED ROLLER CAUSES TRANSLATIONAL MOVEMENT OF THE ROLLER PIVOT SHAFT, SAID VALVE MEANS OPERATIVELY ENGAGING SAID CAM MEANS, MEANS OPERABLE FOR ROTATING SAID VALVE MEANS RELATIVE TO SAID CAM MEANS FOR PRODUCING LINEAR MOVEMENT OF THE VALVE MEANS IN ONE DIRECTION OR THE OTHER DEPENDING ON THE DIRECTION OF ROTATION, SAID VALVE MEANS BEING EFFECTIVE IN RESPONSE TO LINEAR MOVEMENT IN EITHER DIRECTION FOR CHANGING THE FLUID PRESSURE FORCE ACTING AGAINST THE ROLLER PIVOT SHAFTS TO CAUSE TRANSLATIONAL MOVEMENT OF EACH OF SAID SHAFTS THEREBY INDUCING SPEED-RATIO-CHANGING MOVEMENT OF THE ROLLERS WITH ACCOMPANYING PIVOTAL MOVEMENT OF THEIR PIVOT SHAFTS, AND THE OPERATIVE ENGAGEMENT BETWEEN THE CAM AND VALVE MEANS BEING SUCH THAT SAID TRANSLATIONAL MOVEMENT OF SAID ONE ROLLER PIVOT SHAFT AND THE RESULTING PIVOTAL MOVEMENT OF SAID SHAFT ARE BOTH EFFECTIVE THROUGH SAID CAM MEANS TO LINEARLY MOVE THE VALVE MEANS IN THE OPPOSITE DIRECTION FROM THAT PRODUCING SAID FLUID PRESSURE CHANGE.