Patent ID: 7331324
Filing Date: 2008-02-19
Classification: F01B

Abstract:
1. A device comprising: a. a crankcase; b. a cylinder integral with said crankcase; c. a piston configured so as to allow reciprocal motion of said piston in said cylinder; d. a crankshaft mounted in said crankcase configured so as to allow for rotation of said crankshaft in said crankcase; e. said crankshaft configured so as to form a cylindrical crankshaft bearing surface between said crankshaft and said crankcase; f. said crankshaft bearing surface having a diameter of at least the stroke distance; g. a crankcase chamber formed by said crankcase, said piston and said crankshaft; h. a connecting rod configured between said piston and said crankshaft so as to allow reciprocal motion of said piston in said cylinder; i. a port in said crankcase circumferentially located to said crankshaft bearing surface; j. a channel located within said crankshaft configured so as to communicate with said port and a passageway; k. said passageway configured so as to allow communication between said channel and said crankcase chamber.