Patent ID: 6966281

Claim:
An internal combustion device for starting a parent engine, the parent engine having a crankshaft, comprising: a frame having a cylinder and a piston in the cylinder forming a combustion chamber, the frame further having an air passage and a fuel passage for receiving air and fuel into the combustion chamber; a rod interconnecting the piston to a gear train, the gear train being operationally connected to a crankshaft of the parent engine; and an ignition mechanism operationally connected to the combustion chamber, the ignition mechanism for initiating a combustion process using the received fuel and air within the combustion chamber, wherein the piston is driven one power stroke within the cylinder, causing the crankshaft of the parent engine to rotate; and further wherein the cylinder has a lower end and an upper end, and further wherein the piston within the cylinder forms a purge chamber, the device further comprising a purging air shroud about the cylinder forming a purged air conduit, the purged air conduit extending from the lower end of the cylinder to the upper end of the cylinder, such that air purged from the purging chamber enters the purged air conduit and flows through the conduit into the combustion chamber.