Power steering

Claim 1

IN A POWER STEERING DEVICE, A GEARING DEVICE COMPRISING A CIRCULAR SPLINE HAVING CIRCULARLY DISPOSED GEAR TEETH, A FLEXSPLINE COOPERATING WITH THE CIRCULAR SPLINE AND HAVING GEAR TEETH WHICH ARE IN CONTACT WITH THE GEAR TEETH OF THE CIRCULAR SPLINE AT A PLURALITY OF CIRCUMFERENTIALLY SPACED POINTS WITH INTERMEDIATE POINTS AT WHICH THE TEETH ON THE FLEXSPLINE ARE OUT OF MESH WITH THE TEETH ON THE CIRCULAR SPLINE, THE CIRCULAR SPLINE AND THE FLEXSPLINE BEING ONE WITHIN ANOTHER, THE TEETH ON THE EXTERNAL ONE OF THE CIRCULAR SPLINE AND THE FLEXSPLINE BEING MORE NUMEROUS THAN THE TEETH ON THE INTERNAL ONE BY A NUMBER EQUAL TO OR A MULTIPLE OF THE NUMBER OF CIRCUMFERENTIALLY SPACED POINTS AT WHICH THE TEETH ARE IN CONTACT, A WAVE GENERATOR ON THE SIDE OF THE FLEXSPLING REMOTE FROM THE CIRCULAR SPLINE AND HAVING A PLURALTIY OF LOBES WHICH DEFLECT THE FLEXSPLINE INTO MESH WITH THE CIRCULAR SPLINE, THE NUMBER OF POINTS OF MESH OF THE FLEXPLINE WITH THE CIRCULAR SPLINE BEING EQUAL TO OR A MULTIPLE OF THE NUMBER OF LOBES ON THE WAVE GENERATOR, AN INPUT SHAFT OPERATIVELY CONNECTED TO ONE OF THE THREE AFORESID PARTS OF THE GEARING DEVICE, NAMELY, THE CIRCULAR SPLINE, THE FLEXSPLINE, AND THE WAVE GENERATOR, AN OUTPUT SHAFT OPERATIVELY CONNECTED TO ANOTHER OF THE THREE AFORESAID PARTS OF GEARING DEVICE, THE THIRD OF THE THREE AFORESAID PARTS NOT CONNECTED EITHER TO THE INPUT SHAFT OR THE OUTPUT SHAFT BEING NORMALLY STATIONARY TO SERVE AS A REACTION MEANS FOR THAT ONE OF THE CIRCULAR SPLINE, THE FLEXSPLINE AND THE WAVE GENERATOR CONNECTED TO THE OUTPUT SHAFT, AND MEANS RESPONSIVE TO A MOTION OF THE INPUT SHAFT FOR DRIVING SAID NORMALLY STATIONARY ELEMENT IN A DIRECTION WHICH WILL INCREASE THE RESULTANT MOTION OF THE OUTPUT SHAFT.