Patent ID: 8033265

Claim:
An internal combustion engine, the engine comprising: an engine housing having a first wall delimiting a first combustion chamber and a second wall delimiting a second combustion chamber with the first and second walls each defining at least a section of a torus; a first piston having a first piston head further delimiting said first combustion chamber, a second piston head further delimiting said second combustion chamber, a first pivot arm coupled to a first connecting rod, and a second pivot arm coupled to a common pivot point; a second piston having a third piston head further delimiting said first combustion chamber, a fourth piston head further delimiting said second combustion chamber, a third pivot arm coupled to a second connecting rod, and a fourth pivot arm coupled to said common pivot point; a first crankshaft coupled to said first connecting rod, and a second crankshaft coupled to said second connecting rod; wherein said first and second pistons are guided along a curved path defined by said common pivot point; wherein said first and second pistons move in opposite directions; wherein said second pivot arm of said first piston and said fourth pivot arm of said second piston oscillate about said common pivot point; wherein said first crankshaft and said second crankshaft are located outside the curved path of said first piston and said second piston as defined by said common pivot point; and wherein said common pivot point further comprises: a guide frame having an open receiving area in which an engaging member couples the guide frame to either the second pivot arm or the fourth pivot arm; and a guiding means that includes two parallel guide columns; wherein the motion of the guide frame along the guide columns is transferred to a piston.