Patent ID: 7080620
Filing Date: 2006-07-25
Classification: F01M,F02B

Abstract:
1. An internal combustion engine including structure for lubricating at least one bearing disposed therein, comprising: an engine housing including a cylinder with a reciprocating piston of the engine and a crankcase volume with a crankshaft having the at least one bearing operatively connected thereto, wherein the crankcase volume contains at least air and a lubricant; a counterweight arrangement that provides an essentially solid circular profile; at least one passageway on the counterweight arrangement extending to a location adjacent to the engine housing; and at least one passageway extending through the engine housing from a location adjacent to the counterweight to the at least one bearing, wherein the two passageways are selectably aligned by movement of the piston to cause a lubricating flow between the at least one bearing and the crankcase volume.