Crankcase ventilation system

Claim 1

AN ENGINE ASSEMBLY COMPRISING: AN INTERNAL COMBUSTION ENGINE INCLUDING A SEALED CRANKCASE AND INTAKE MANIFOLD MEANS; CONDUIT MEANS EXTENDING FROM SAID SEALED CRANKCASE TO SAID INTAKE MANIFOLD MEANS; GASEOUS FLOW REGULATOR MEANS FOR SAID CONDUIT INCLUDING A VALVING MEANS AND A PRESSURE RESPONSIVE ELEMENT OPERATIVELY ASSOCIATED WITH SAID VALVING MEANS TO OPEN AND CLOSE IT; SAID PRESSURE RESPONSIVE ELEMENT BEING RESPONSIVE TO THE PRESSURE DIFFERENTIAL BETWEEN POSITIVE CRANKCASE PRESSURE OVER A STANDARE PRESSURE TO OPEN SAID VALVING MEANS AND ALLOW FLOW OF GASES FROM SAID CRANKCASE TO SAID INTAKE MANIFOLD UPON AN INCREASE IN CRANKCASE PRESSURE OVER SAID STANDARD PRESSURE AND CAUSING SAID VALVING MEANS TO CLOSE UPON A DECREASE OF CRANKCASE PRESSURE TO SAID STANDARD PRESSURE; AND A ONE-WAY NORMALLY CLOSED VALVE BETWEEN SAID CRANKCASE AND THE SURROUNDING ATMOSPHERE SUBJECT TO OPENING UPON A DECREASE IN CRANKCASE PRESSURE A PREDETERMINED AMOUNT BELOW ATMOSPHERIC PRESSURE TO OPEN AND ADMIT A SMALL QUANTITY OF ATMOSPHERIC AIR TO SAID CRANKCASE UNTIL CRANKCASE PRESSURE INCREASES ABOVE SAID PREDETERMINED AMOUNT.