Patent ID: 6170456
Filing Date: 2001-01-09
Classification: F01M,F02B

Abstract:
A lubricating device for a four-stroke engine, comprising:a crankcase which includes an upper crankcase body, and a lower crankcase body in which a plurality of first through holes are provided, said lower crankcase body further having an extension that forms a trough, the extension having a second through hole in a bottom thereof in fluid communication with the trough;a plurality of oil plugs, each oil plug being inserted within a respective first through hole, and allowing the limited passage of oil;an enclosed oil box disposed below the crankcase, said extension projecting into the oil box, so that when the four-stroke engine is level, the second through hole is below a level of the oil within the oil box so that the oil within the oil box will flow into the trough via the second through hole;a crankshaft which is disposed in the crankcase; andan oil dipper connected with the crankshaft, and projecting into the trough, so that oil within the trough is stirred and atomized by the oil dipper when the crankshaft is rotated.