Patent ID: 7428886

Claim:
A two-cycle engine, comprising: an elongate cylinder block having opposing first and second coaxial cylinders; a piston assembly designed to slide within said cylinder block in an oscillating manner, said piston assembly having a first piston and a second piston, said first piston and a second piston fixedly coupled to and diametrically opposed; a first cylinder head coupled to the end of said first cylinder, and a second cylinder head coupled to the end of said second cylinder; said piston assembly defining a pumping space between said first piston and the interior of said first cylinder head and also defining a combustion space between said second piston and the interior of said second cylinder head; a transfer duct for providing fluid communication between said pumping space and said combustion space, said transfer duct providing a pressurized intake charge from said pumping space to said combustion space; a connecting rod extending between said first and said second pistons; a housing for storing a lubricating liquid (oil); a crankshaft positioned within said housing, said crankshaft rotatably movable; means affixed to said connecting rod for converting the oscillating motion of said first and second pistons into rotary motion of the crankshaft; one-way valve means in said first cylinder head for controlling the flow of an intake charge into said pumping space; a first lifter valve means in said second cylinder head for controlling the flow of an exhaust charge from said combustion space to ambient air external to said cylinder block; a second lifter valve means in said second cylinder head for controlling the flow of said intake charge from said transfer duct; means for introducing a fuel charge into said combustion chamber; ignition means located in said second cylinder for igniting a fuel charge; a plurality of cams located on the perimeter of said crankshaft, said cams communicating with a lifting rod which causes a rocker arm to control the operation of said first and second lifter valve means; and exhaust means in fluid communication with said combustion space, whereby oscillation of said coupled pistons draws an intake charge into said pumping space and then forces said intake charge from said pumping space through said duct means to said combustion space, wherein said second piston compresses said charge, and upon ignition, said ignited charge drives said second piston forceably, turning said crankshaft and wherein said means for converting the oscillation of said pistons to rotary motion of a single crankshaft, comprises a lever arm, rotatably and slidably mounted to said cylinder block.