Patent ID: 8763583

Claim:
An opposed-piston, opposed-cylinder engine, comprising: a first cylinder having a first inner piston and a first outer piston disposed therein; a second cylinder having a second inner piston and a second outer piston disposed therein, the second cylinder having a central axis substantially collinear with a central axis of the first cylinder; a unitary crankshaft disposed between the first and second cylinders, the crankshaft having a first main bearing, a first outer eccentric journal, a center eccentric journal, a second outer eccentric journal and a second main bearing; a first pushrod coupling the first inner piston with the center eccentric journal; a second pushrod coupling the second inner piston with the center eccentric journal wherein both the first and second pushrods lie in a plane perpendicular to a centerline of the center eccentric journal and such plane intersects the center eccentric journal; a first pullrod with a first end of the first pullrod coupled to the first outer piston and a second end of the first pullrod wrapped around a portion of the first outer eccentric journal; a second pullrod with a first end of the second pullrod coupled to the first outer piston and a second end of the second pullrod wrapped around a portion of the second outer eccentric journal; a third pullrod with a first end of the third pullrod coupled to the second outer piston and a second end of the third pullrod wrapped around a portion of the first outer eccentric journal; and a fourth pullrod with a first end of the fourth pullrod coupled to the second outer piston and a second end of the fourth pullrod wrapped around a portion of the second outer eccentric journal.