Patent ID: 7296544
Filing Date: 2007-11-20
Classification: F02B

Abstract:
1. A four stroke internal combustion engine having at least one cylinder having a crankshaft with a double acting piston dividing the cylinder into two combustion chambers said piston being connected to a respective throw of the crankshaft and being reciprocable within the cylinder to perform a power stroke producing work on the crankshaft while moving towards or away from the crankshaft, the piston being pivotally connected directly to a connecting rod in turn connected directly to a respective throw of the crankshaft, wherein the connecting rod passes sealingly through a separation plate separating the engine sump from the adjacent combustion chamber, the separation plate having an aperture through which the connecting rod passes for accommodating lateral movement of the connecting rod caused by the throw of the crankshaft during rotation thereof, the connecting rod passing through at least one slide member which seals against the rod and is sealingly slidable relative to the separation plate radially or transversely of the cylinder axis.