ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,301, issued on Feb. 10, was assigned to QINGDAO HAIER REFRIGERATOR Co. LTD (Qingdao, China) and HAIER SMART HOME Co. LTD. (Qingdao, China).

"Oil supply device for compressor, compressor, and refrigeration equipment" was invented by Feifei Qi (Shandong, China), Jianru Liu (Shandong, China), Kui Zhang (Shandong, China), Yiming Wang (Shandong, China) and Hualong Chi (Shandong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application discloses an oil supply device for a compressor, a compressor, and refrigeration equipment. The oil supply device for a compressor includes: a piston cylinder with an inner chamber, a piston, and an oute...