OIL DRAIN FOR AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR THAT USED IN AUTOMOTIVE VEHICLES, DEVICE FOR AND METHOD O DRAINING OFF USED ENGINE OIL FROM AN OIL SUMP OF INTERNAL COMBUSTION ENGINE, IN PARTICULAR OF THAT USED IN AUTOMOTIVE VEHICLES

摘要

Improved oil drainage structure and method of drainage for a combustion engine crank case oil pan or the like. This drainage structure provides safe operation along with simple and low cost manufacture and installation in both already existing and newly manufactured crank case oil pans. The improved drainage structure consists of an improved oil drain plug and holding means. The head of the oil drain plug possesses an additional recess designed to facilitate operational engagement with a correspondingly designed elongated holding means. The oil drain plug, elongated holding means, and associated method for unscrewing and removing the oil drain plug allow for the safer, simpler, and cleaner drainage of the used and hot oil.