Two-stroke internal combustion engine

Claim 1

A TWO STROKE CYCLE INTERNAL COMBUSTION ENGINE WHICH COMPRISES A CYLINDER, A PISTON IN THE CYLINDER, A CRANKCASE, A CRANKSHAFT IN THE CRANKCASE HAVING A CRANKPIN CONNECTED TO THE PISTON AND ALSO HAVING LINE BEARING PORTIONS, BEARINGS IN THE CRANKCASE RECEIVING SAID LINE BEARING PORTIONS, SAID CRANKCASE INCLUDING PARTITION MEANS SEALINGLY ENGAGING SAID CRANKSHAFT BETWEEN SAID LINE BEARING PORTIONS AND SAID CRANKPIN, A COVER MEMBER EXTENDING BETWEEN SAID PARTITION MEANS ON THE SIDE OF THE CRANKSHAFT OPPOSITE SAID CYLINDER WHEREBY SAID PARTITION MEANS AND COVER MEMBER DEFINE A CHAMBER IN WHICH SAID CRANKPIN OPERATES, SAID ENGINE INCLUDING MEANS FOR DRAWING ITS AIR FOR COMBUSTION THROUGH SAID CHAMBER, SAID CRANKCASE INCLUDING A SUMP PORTION BENEATH SAID CHAMBER AND EXTENDING BEYOND SAID CHAMBER TO AT LEAST THE REGION SAID CHAMBER AND INCLUDING A PART EXTENDING UPWARDLY ON SAID ONE SIDE OF SAID CHAMBER TO AT LEAST THE REGION OF THE CRANKSHAFT CENTERLINE, A DRAIN TUBE LEADING FROM SAID CHAMBER THROUGH SAID COVER MEMBER INTO SAID EXTENDING PORTION OF SAID SUMP TO ABOUT THE LEVEL OF THE CENTERLINE OF THE CRANKSHAFT WHEREBY PRESSURE IN SAID CHAMBER WILL CAUSE OIL TO BE DISCHARGED THEREFROM VIA SAID TUBE INTO SAID SUMP, AND DRAIN PASSAGES LEADING FROM THE ENDS OF SAID JOURNAL PORTIONS OF THE CRANKSHAFT ADJACENT SAID PARTITION MEANS INTO SAID SUMP PORTION OF THE CRANKCASE TO PREVENT OIL FROM SAID JOURNAL PORTIONS FROM ENTERING SAID CHAMBER.