Power transmission mechanism

Claim 1

IN A POWER TRANSMISSION INCLUDING A HYDRODYNAMIC TORQUE CONVERTER AND FLUID PRESSURE OPERATED CLUTCH MEANS FOR CONNECTING SAID TORQUE CONVERTER TO MEANS TO BE DRIVEN THEREBY, THE COMBINATION INCLUDING A HOUSING FOR THE POWER TRANSMISSION, A FLUID DISTRIBUTOR BLOCK MOUNTED WHOLLY WITHIN SAID HOUSING, SAID FLUID DISTRIBUTOR BLOCK HAVING ONE HIGH AND TWO LOW PRESSURE FLUID PASSAGES THEREIN, A SOURCE OF FLUID UNDER PRESSURE COMMUNICATING WITH THE HIGH PRESSURE FLUID PASSAGE IN SAID DISTRIBUTOR BLOCK, CONTROL VALVE MEANS OPERATIVELY ASSOCIATED WITH SAID DISTRIBUTOR BLOCK AND SELECTIVELY ACTUATABLE TO DIRECT FLUID FROM SAID HIGH PRESSURE FLUID PASSAGE TO THE FLUID PRESSURE OPERATED CLUTCH MEANS, FIRST PRESSURE REGULATING VALVE MEANS ASSOCIATED WITH SAID FLUID DISTRIBUTOR BLOCK AND COMMUNICATING WITH SAID HIGH AND ONE SAID LOW PRESSURE FLUID PASSAGES THEREIN, SAID VALVE MEANS BEING ADAPTED AND ARRANGED TO MAINTAIN A PREDETERMINED FLUID PRESSURE WITHIN SAID HIGH PRESSURE PASSAGE AND TO BY-PASS EXCESS FLUID INTO SAID ONE LOW PRESSURE PASSAGE, INLET AND OUTLET PASSAGES FOR SAID TORQUE CONVERTER, SAID LOW PRESSURE PASSAGES IN SAID DISTRIBUTOR BLOCK COMMUNICATING WITH THE INLET AND OUT LET PASSAGES TO SAID CONVERTER, AND A SECOND PRESSURE REGULATING VALVE MEANS ASSOCIATED WITH SAID DISTRIBUTOR BLOCK AND COMMUNICATING WITH SAID SECOND LOW PRESSURE FLUID PASSAGE AND ADAPTED AND ARRANGED TO MAINTAIN A PREDETERMINED FLUID PRESSURE WITHIN SAID TORQUE CONVERTER.