ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,955, issued on Sept. 23, was assigned to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS Co. LTD. (Tokyo).
"Air compressor" was invented by Yuuji Itou (Tokyo), Toshiaki Yabe (Tokyo), Kohei Sakai (Tokyo) and Takashi Nakajima (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an air compressor that suppresses a rise in delivery temperature due to a change in atmospheric pressure, and consequently improves the life of parts. The air compressor 1 includes a motor 2, a compressor main body 3 driven by the motor 2 to compress air, a delivery pressure sensor 12 that senses a delivery pressure of the compressor main body 3, an atmospheric pressure sens...