Drive system for agricultural machine

Claim 1

A WINDROWER MACHINE COMPRISING, IN COMBINATION, A FRAME, A PAIR OF LATERALLY SPACED GROUND WHEELS SUPPORTING A FORWARD END OF SAID FRAME AND A CASTER WHEEL SUPPORTING A REARWARD END IN A LOCATION GENERALLY IN TRAILING RELATION TO ONE OF SAID PAIR OF WHEELS, A HEADER MOUNTED ON SAID FRAME FORWARD END AND EXTENDING LATERALLY RELATIVE THERETO, A TRANSVERSELY RECIPROCABLE SICKLE AND A REEL CARRIED ON SAID HEADER AND EXTENDING FROM ONE SIDE TO THE OTHER OF THE HEADER, AN ENGINE MOUNTED ON SAID FRAME BETWEEN SAID FORWARD AND REARWARD ENDS AND ALONG THE SIDE OF THE FRAME TOWARD SAID ONE GROUND WHEEL SAID ENGINE HAVING AN OUTPUT DRIVE SHAFT EXTENDING ACROSS A LONGITUDINAL CENTRAL VERTICAL PLANE SUBSTANTIALLY MIDWAY BETWEEN SAID PAIR OF GROUND WHEELS, SAID DRIVE SHAFT EXTENDING PARALLEL TO THE AXES OF SAID WHEELS, A MAIN DRIVE WHEEL SUPPORTED ON SAID FRAME FORWARD END FOR ROTATION ON AN AXIS PARALLEL TO SAID SHAFT AND IN A VERTICAL PLANE ALONG SAID CENTRAL PLANE, A DRIVE TRAIN ALONG SAID CENTRAL PLANE CONNECTING SAID ENGINE SHAFT AND SAID DRIVE WHEEL, A PAIR OF OUTPUT ELEMENTS PROJECTING RESPECTIVELY FROM OPPOSITE SIDES OF SAID DRIVE WHEEL, A FIRST DRIVE CONNECTION BETWEEN THE OUTPUT ELEMENT AT ONE SIDE OF SAID DRIVE WHEEL TO ONE SIDE OF SAID HEADER, AND A SECOND DRIVE CONNECTION BETWEEN THE OUTPUT ELEMENT AT THE OTHER SIDE OF SAID DRIVE WHEEL TO THE OTHER SIDE OF THE HEADER.