Patent ID: 6718933
Filing Date: 2004-04-13
Classification: F01L

Abstract:
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 body member, substantially circular in cross section, said valve body member having a curved annular upper surface conforming to said spherical periphery of said intake valve or said exhaust valve, said valve body member having an aperture therethrough defined by an inner circular side wall coincidental with said aperture of said inlet port or said outlet port, said valve body member having an annular receiving groove formed on said curved upper surface about said aperture for receipt of a lubricating insert ring, said lubricating insert ring having a curved upper surface complimentary to said curved upper surface of said valve body member; said valve 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 body member of a plurality of lateral sealing rings for sealing said valve body member in said valve seat; said valve body member further having a plurality of radial throughbores formed between said inner circular wall defining said aperture in said valve body member and said outer circumferential side wall, said throughbores being in the same plane as one of said sealing rings, thereby permitting compressed gases to exert outward pressure on said sealing ring.