Dual inlet passages for internal combustion engines

Claim 1

A CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE OF THE TYPE HAVING A PAIR OF INTAKE VALVES DISPOSED ON OPPOSITE SIDES OF A LONGITUDINAL PLANE THROUGH THE AXIS OF THE CYLINDER ASSOCIATED WITH SAID VALVES AND SPACED IN ONE LONGITUDINAL DIRECTION FROM A TRANSVERSE PLANE THROUGH SAID AXIS AT RIGHT ANGLES TO SAID LONGITUDINAL PLANE, SAID HEAD COMPRISING: A BOTTOM WALL, A LONGITUDINALLY EXTENDING VERTICAL SIDE WALL, A PAIR OF INLET PORTS FOR SAID VALVES IN SAID BOTTOM WALL AT LATERALLY OPPOSITE SIDES, RESPECTIVELY, OF SAID LONGITUDINAL PLANE, WALLS DEFINING A FIRST STREAMLINED PASSAGE EXTENDING FROM A PORTION OF SAID SIDE WALL INTERSECTED BY SAID TRANSVERSE PLANE INWARDLY TOWARD SAID AXIS AND CURVING IN SAID ONE LONGITUDINAL DIRECTION TOWARD THE ONE OF SAID PORTS NEAREST SAID SIDE WALL IN TANGENTIAL RELATION TO SAID CYLINDER AND DOWNWARDLY TO SAID ONE PORT AT AN ACUTE VERTICAL ANGLE TO SAID BOTTOM WALL, AND WALLS DEFINING A SECOND STREAMLINED PASSAGE EXTENDING VERTICALLY ABOVE SAID FIRST PASSAGE FROM SAID SIDE WALL INWARDLY AND IN SAID ONE LONGITUDINAL DIRECTION AROUND THE INTAKE VALVE FOR SAID ONE PORT ON THE SIDE THEREOF REMOTE FROM SAID AXIS AND THENCE CURVING TO A TANGENTIAL RELATIONSHIP WITH SAID CYLINDER AND SLOPING DOWNWARDLY TO THE OTHER PORT AT AN ACUTE VERTICAL ANGLE TO SAID BOTTOM WALL, SAID PASSAGES BEING EFFECTIVE UPON INSTALLATION OF SAID HEAD ON SAID ENGINE TO DIRECT AIR TANGENTIALLY TO THE CYLINDER WALL OF SAID CYLINDER AND DOWNWARDLY THROUGH SAID PORTS, RESPECTIVELY, AT AN ACUTE VERTICAL ANGLE THEREBY INDUCING SAID AIR TO SWIRL UNIDIRECTIONALLY ABOUT THE AXIS OF SAID CYLINDER.