Patent ID: 6880494

Claim:
An internal combustion engine comprising: an engine ring constructed of two concentric rings, one being an outer engine ring and an other being an inner engine ring, each ring of said two concentric rings having a C-shaped cross-section having a first seam edge, a second seam edge, and an engine ring wall therebetween, wherein said first seam edge of said outer engine ring is sealable with said first seam edge of said inner engine ring, and said second seam edge of said outer engine ring is correspondingly sealable with said second seam edge of said inner engine ring so as to form a torus having an outer circumferential engine wall of a first ring diameter formed by said engine ring wall of said outer engine ring, and an inner circumferential engine wall of a second ring diameter formed by said engine ring wall of said inner engine ring, said first ring diameter being greater than said second ring diameter; a plurality of pistons including a first piston that is fixedly connected to one of said two concentric rings and a second piston that is fixedly connected to another of said two concentric rings and wherein, when combustion forces in said engine ring force said plurality of pistons to move, both said outer engine ring and said inner engine ring rotate counter to each other; and a gas flow valve for providing gas flow into or out of said engine ring.