Patent ID: 7891334

Claim:
A four-cycle internal combustion engine comprising a variable length connecting rod, two crank gears, and two drive gears; wherein the connecting rod comprises a first end and a second end; wherein the first end of the connecting rod is connected to a piston; wherein the piston is located inside of a cylinder; wherein the second end of the connecting rod is connected to a yoke assembly; wherein the yoke assembly comprises two arms, a first connecting shaft, and two second connecting shafts; wherein the second end of the connecting rod comprises an aperture through which the first connecting shaft extends; wherein the first connecting shaft connects the second end of the connecting rod to each of the yoke arms; wherein the second end of the connecting rod and the yoke arms rotate freely about the first connecting shaft; wherein each crank gear comprises an off-center hole; wherein the second connecting shafts connect the yoke arms to the off-center hole of each crank gear; wherein the yoke arms and the crank gear rotate freely about the second connecting shaft; wherein each crank gear is driven by a drive gear; wherein the piston travels downward in the cylinder during an intake stroke and a power stroke; and wherein the piston travels farther downward in the cylinder during the power stroke than it does during the intake stroke.