Apparatus and Method for Draining Out the Residual Oil in a Replaceable Oil Filter Used in a Marine Engine for Avoiding Pollution to the Environment When Changing Filters

摘要

The invention is directed to an oil filter cartridge containing a seale d outlet orifice which can be opened to allow for efficient oil recovery. An o il filter cartridge with an outlet valve is considered to be part of the claime d invention. The oil filter cartridge with attached valve is particularly beneficial for use on marine engines where quarters are cramped and the chance for wate r pollution due to oil spill is great.