Combination oil bath and dry air filter for internal combustion engine

Claim 1

AN AIR FILTER COMPRISING A BOTTOM COVER HAVING A BOTTOM WALL WITH A CENTRAL AIR OUTLET PASSAGE, A TOP COVER DETACHABLY SECURED TO SAID BOTTOM COVER, THE OUTER MARGINS OF SAID COVERS BEING SPACED APART TO PROVIDE AN ANNULAR AIR INLET PASSAGE, MEANS FORMING AN ANNULAR OIL CHAMBER IN SAID BOTTOM COVER ADJACENT THE OUTER PERIPHERY THEREOF, MEANS FORMING AN ANNULAR VERTICAL AIR PASSAGE EXTENDING UPWARDLY FROM SAID OIL CHAMBER ESSENTIALLY TO THE TOP OF SAID FILTER, AN ANNULAR OIL BATH FILTER ELEMENT EXTENDING RADIALLY ACROSS THE FULL WIDTH OF SAID VERTICAL AIR PASSAGE, AND AN ANNULAR DRY FILTER ELEMENT POSTIONED RADIALLY WITHIN SAID VERTICAL AIR PASSAGE AND SAID OIL BATH FILTER ELEMENT AND EXTENDING ESSENTIALLY FROM TOP TO BOTTOM OF SAID FILTER BETWEEN THE UPPER END OF SAID VERTICAL AIR PASSAGE AND SAID AIR OUTLET PASSAGE, THE HEIGHT OF SAID DRY FILTER ELEMENT BEING ESSENTIALLY EQUAL TO THE COMBINED HEIGHT OF SAID OIL CHAMBER AND SAID OIL BATH FILTER ELEMENT.