Patent ID: 7647909

Claim:
A valve seal for a rotary valve assembly for use in internal combustion engines of the piston and cylinder type, the rotary valve assembly positioned within a two piece cylinder head, said cylinder head defining a plurality of drum accommodating cavities for receipt of a plurality of rotary intake valves and rotary exhaust valves, said rotary intake valves and said rotary exhaust valves having a spherical section defined by two parallel planes of the sphere, said planes being disposed symmetrically about the center of said sphere, defining a spherical periphery and planar end walls, said rotary intake valves and said rotary exhaust valves mounted on the shaft means within said drum accommodating cavities in gas tight sealing contact with an inlet port and an exhaust port respectively, said rotary intake valve and said rotary exhaust valves having passageways therethrough for the introduction and interruption of fuel air mixture to the engine and the evacuation of exhaust gases from the engine respectively, said gas tight sealing contact of said rotary intake valve and said rotary exhaust valve of said intake port and said exhaust port, respectively, accomplished by a valve seal and a valve seat, the valve seal comprising: a valve seal body member, substantially circular in cross section, said valve seal body member having a curved annular upper surface conforming to said spherical periphery of said intake valve or said exhaust valve, said curved annular upper surface in annular groove of semicircular cross section formed in said curved annular upper surface, said valve seal body member having an aperture therethrough defined by an inner circumferential side wall coincidental with said aperture of said inlet port or said outlet port; said valve seal body member further having an outer circumferential side wall having formed thereon a plurality of mounting ribs for the positioning about said outer circumferential side wall of said valve seal body member of a plurality of lateral sealing rings for sealing said valve seal body member in said valve seat; said valve seal body member having a planar bottom wall extending between said inner circular side wall and said outer circumferential side wall; said valve seal body member further having a plurality of throughbores formed between said curved annular upper surface and said valve seat, said throughbores permitting compressed gases to exert equalizing pressure between said valve seal body member and said spherical rotary valve.