ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,375, issued on Jan. 20, was assigned to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS Co. LTD. (Tokyo).
"Compressor" was invented by Kosuke Sudo (Tokyo), Nobuyuki Narisawa (Tokyo), Sho Goto (Tokyo) and Naoya Hasegawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A compressor has a piston that has a piston ring groove in an outer circumferential surface formed of a curved surface and reciprocates while rocking in a cylinder, a piston ring that is mounted in the piston ring groove and slides on an inner circumferential surface of the cylinder, and a crankshaft that reciprocates the piston through a connecting rod. A center axis of the cylinder is dispo...