ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,397,311, issued on Aug. 26, was assigned to SCIENTECH Corp. (Taipei, Taiwan).
"Liquid injection device" was invented by Chuan-Chang Feng (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid injection device includes a nozzle, a moving element and a control valve. The nozzle has a channel, a bypass passage and a suck back passage. The channel penetrates through the nozzle for injecting a working fluid. The channel has a liquid outlet. The bypass passage has a first opening, a switch-on position and a switch-off position. The suck back passage has a second opening between the first opening and the liquid outlet. The first opening and th...