A filter for the lubricating oil and refrigerant within refrigerators, freezers and heat pumps is provided which does not interfere with the cooling cycle. The filter utilizes a housing with an orifice that functions as an outlet and an inlet for the transfer of fluids. The filter withdrawn fluids from...http://www.google.de/patents/US5089119?utm_source=gb-gplus-sharePatent US5089119 - Filter for a vapor compression cycle device
