Patent ID: 8776756

Claim:
A slide valve for aspirating internal combustion engines, the slide valve comprising: a tubular body adapted to be slidably disposed within a tubular tunnel or sleeve, said body comprising at least one aspiration port and an elongated, internal tubular passageway in fluid flow communication with said aspiration port for intaking or exhausting gases; an open connecting rod section with an interior enabling mechanical connection to a rod for reciprocating the slide valve; a closed interior wall that separates the connecting rod section from the internal tubular passageway; a port section proximate said closed wall in which said at least one aspiration port is defined, wherein an arcuate cutout defined in said port section functions as said aspiration port, the cutout contacting said closed wall and the cutout comprising at least one radiused arch; a tubular power stroke midsection adjacent the port section; a tubular oiling section adjacent the power stroke midsection; a terminal open section adjacent said oiling section that is in fluid flow communication with said tubular passageway; said elongated, internal tubular passageway extending coaxially longitudinally between said closed wall and a spaced-apart, open valve end, the open valve end comprising radiused lips; at least one concentric ring groove externally separating the valve rod section from the port section; at least one concentric ring groove externally separating the valve port section from the adjacent valve power stroke midsection; at least one concentric ring groove externally separating the valve midsection from the adjacent oiling section; at least one concentric ring groove externally separating the valve oiling section from the valve open section; and, at least one sealing ring seated in said ring grooves.