US Patent Issued to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS on Sept. 23 for "Liquid-feed-type gas compressor" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,972, issued on Sept. 23, was assigned to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS Co. LTD (Tokyo).

"Liquid-feed-type gas compressor" was invented by Yuta Kajie (Tokyo), Shigeyuki Yorikane (Tokyo) and Kenji Morita (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An oil-feed-type air compressor includes a compressor main body driven by an electric motor, a separator that separates the oil from compressed air delivered from the compressor main body, an oil supply system that supplies the oil separated by the separator to working chambers of the compressor main body, an oil cooler that is disposed in the oil supply system and cools the oil by using co...