Pump and motor hydraulic transmission

Claim 1

IN A PUMP AND MOTOR HYDRAULIC TRANSMISSION OF THE TYPE INCLUDING ROTABLE SEPARATE INPUT AND OUTPUT SHAFTS, A MULTI-CYLINDER VARIABLE CAPACITY PUMP UNIT CONNECTED FOR ROTATION WITH SAID INPUT SHAFT, A MULTI-CYLINDER FIXED CAPACITY MOTOR UNIT OPERATIVELY DISPOSED BETWEEN SAID INPUT AND OUTPUT SHAFTS AND HAVING RELATIVELY CONFRONTING PORTS THROUGH WHICH LIQUID MAY BE TRANSFERRED BETWEEN THE CYLINDERS OF SAID PUMP AND MOTOR UNITS, A FIXED VALVE HEAD HAVING SEPARATE PASSAGES THEREIN ARRANGED TO COMMUNICATE WITH PORTS OF THE PUMP UNIT DURING ROTATION OF THE LATTER, AND A VALVE BLOCK CARRIED BY AND ROTATABLE WITH THE INPUT SHAFT AND PROVIDED WITH SEPARATE PASSAGES COMPLEMENTARY WITH THE PASSAGES OF THE VALVE HEAD AND ARRANGED TO COMMUNICATE WITH THE PORTS OF THE MOTOR UNIT DURING ROTATION OF THE LATTER AND OF THE INPUT SHAFT, SAID VALVE HEAD HAVING THEREIN DUCTS THROUGH WHICH FLUID FLOWS BETWEEN THE SEPARATE PASSAGES OF SAID VALVE HEAD, THE IMPROVEMENT COMPRISING RESILIENT MOUNTING MEANS SECURING SAID VALVE HEAD AND SAID MOTOR UNIT TO SAID INPUT SHAFT.