ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,053, issued on July 28, was assigned to TRANE INTERNATIONAL INC. (Davidson, N.C.).

"Lubricant management in an HVACR system" was invented by Keith Adam Novak (Holmen, Wis.) and Gordon Powell Jr. (Stoddard, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heating, ventilation, air conditioning, and refrigeration (HVACR) system is disclosed. The HVACR system includes a compressor, a condenser, and an evaporator fluidly connected to form a refrigerant circuit. A lubricant return line is fluidly connected to the compressor and to the evaporator. A pressure difference between the compressor and the evaporator induces a fluid flow of lubricant from t...