ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,288, issued on April 15, was assigned to TAIWAN CHELIC Co. LTD. (New Taipei, Taiwan).
"Two-stage speed controller" was invented by Ping-Cheng Yu (New Taipei, Taiwan), Po-Hsun Yu (New Taipei, Taiwan), Chih-Sheng Cheng (New Taipei, Taiwan) and Wei-Xiang Cheng (New Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A two-stage speed controller includes a main body including a first port and a second port in communication with each other, and a primary channel and a secondary channel for fluid to flow therethrough. The secondary channel allows flowing in a single direction to a pressure accumulation chamber. A sliding-axle seat is arranged in ...