Lubricant charging device

A lubricant charging device, comprising:

• an adaptor for being interposed between a filter mounting plate on an engine and a spin-on type oil filter, said adaptor having opposite first and second faces;
• said first face having a centrally located, threaded receptacle and a peripheral gasket, whereby said first face may be installed on the filter mounting plate of the engine;
• said second face having a centrally located, threaded mounting connector extending therefrom, and a peripheral gasket sealing surface, whereby an oil filter may be installed on said second face;
• said adaptor further including an axial passage extending between said receptacle on said first face and said mounting connector on said second face for communicating a lubricant from the oil filter to the engine;
• a plurality of outlet passages extending through said adaptor between said first and second faces and arranged around said axial passage for communicating lubricant from the engine to the oil filter;
• a priming port for communicating lubricant from an outside source into at least one said outlet passage;
• a check valve for preventing lubricant flow from said at least one outlet passage through said primary port to the outside source;
• a backflow plate adjacent said first face;
• at least one opening formed in said backflow plate for permitting communication of lubricant between the engine and said outlet passages;
• and
• a flexible panel interposed between said first face and said at least one opening, said flexible panel having an edge affixed to said backflow plate adjacent said at least one opening and further having a portion not affixed to said backflow plate, whereby said flexible panel may be biased toward said backflow plate by differential lubricant pressures on opposite sides of said backflow plate to thereby close said at least one opening to prevent lubricant that is introduced through said priming port into said at least one outlet passage from flowing through said at least one opening into the engine and instead directing the lubricant toward said second face and into the filter, or alternatively, biased away from said backflow plate to permit lubricant to flow from the engine through said outlet passages to the filter.