Engine crankshaft and balancing arrangement

Claim 1

IN AN EIGHT CYLINDER V-TYPE FOUR-CYCLE INTERNAL COMBUSTION ENGINE HAVING TWO BANKS OF FOUR CYLINDERS EACH WITH AN ANGLE OF 60* BETWEEN THE BANKS, A CRANKSHAFT HAVING EIGHT CRANKPINS ARRANGED SEQUENTIALLY IN FIRST, SECOND, THIRD AND FOURTH PAIRS OF ADJACENT CRANKPINS, THE CRANKPINS OF EACH PAIR BEING DISPLACED 30* FROM ONE ANOTHER, THE FIRST AND SECOND PAIRS OF CRANKPINS BEING DISPLACED 90* FROM ONE ANOTHER AND 180* FROM THE FOURTH AND THIRD PAIRS OF CRANKPINS RESPECTIVELY, ONE JOURNAL PROVIDED BEFORE SAID FIRST OF CRANKPINS AND ANOTHER AFTER SAID LAST PAIR OF CRANKPINS AND AN ADDITIONAL JOURNAL INTERMEDIATE EACH ADJACENT PAIR OF CRANKPINS, AT LEAST TWO COUNTERWEIGHTS ON SAID CRANKSHAFT SO ANGULARLY AND LONGITUDINALLY DISPLACED AND OF SUFFICIENT MAGNITUDE AS TO COUNTERBALANCE BOTHE THE TOTAL ROTATING UNBALANCE COUPLE OF CONSTANT MAGNITUDE PRODUCED ON SAID CRANKSHAFT BY ECCENTRIC ROTATING AND RECIPROCATING MASSES AND ONE-HALF THE MAXIMUM RESIDUAL PLANAR COUPLE PRODUCED ON SAID CRANKSHAFT BY RECIPROCATING MASSES, AND A SECOND SHAFT POSITIVELY DRIVEN BY SAID CRANKSHAFT AT CRANKSHAFT SPEED BUT IN THE OPPOSITE DIRECTION OF ROTATION, SAID SECOND SHAFT CARRYING AT LEAST TWO COUNTERWEIGHTS SO ANGULARLY AND LONGITUDINALLY DISPLACED AND OF SUFFICIENT MAGNITUDE AS TO COMPLETELY BALANCE THE REMAINING PORTION OF THE RESIDUAL PLANAR COUPLE WHICH IS NOT BALANCED BY SAID CRANKSHAFT COUNTERWEIGHTS.