Hydrostatic system charging and by-pass valve means

Claim 1

IN A VEHICLE HAVING AN ENGINE AND TRACTION WHEELS WITH A HYDRAULIC TRANSMISSION OPERATIVELY CONNECTED THEREBETWEEN INCLUDING A PUMP AND MOTOR, FIRST CONDUIT MEANS CONNECTING THE PUMP OUTLET WITH THE MOTOR INLET AND SECOND CONDUIT MEANS CONNECTING THE MOTOR OUTLET WITH THE PUMP INLET SO THAT THE PUMP SUPPLIES FLUID UNDER PRESSURE TO DRIVE THE MOTOR, AND A VARIABLE ANGLE SWASH PLATE MECHANISM IN THE PUMP OPERABLE FOR VARYING THE TRANSMISSION RATIO OF THE TRANSMISSION AND FOR CONTROLLING DIRECTION OF FLUID FLOW BETWEEN PUMP AND MOTOR ACCORDING TO DESIRED VEHICLE MOVEMENT, AND A FLUID CHARGE PUMP DRIVEN BY THE ENGINE AND COMMUNICATIVELY CONNECTED TO A FLUID SOURCE, THE COMBINATION THEREWITH OF, VALVING MEANS COMMUNICATIVELY INTERCONNECTABLE BETWEEN SAID CHARGE PUMP AND THE FIRST AND SECOND CONDUIT MEANS INTERCONNECTING SAID PUMP AND MOTOR AND OPERABLE IN ONE POSITION FOR PORTING FLUID FLOW FROM SAID CHARGE PUMP SELECTIVELY TO THE FIRST AND SECOND OF SAID CONDUIT MEANS, AND IN ANOTHER POSITION FOR BY-PASSING FLUID BETWEEN THE SAID FIRST AND SECOND CONDUIT MEANS.