ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,624, issued on March 31, was assigned to LIN GWO TSAIR ENTERPRISE Co. LTD. (Tainan, Taiwan).
"Manual screw shaft driving device" was invented by Yu-Hao Lin (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is manual screw shaft driving device, comprising: a screw shaft, a driving member, a gripping member and a driving direction switching member, wherein the driving member is fitted around the screw shaft in a screw fit manner, the screw shaft is provided passing through a sliding and rotating space inside the gripping member, and the driving member is disposed in the sliding and rotating space, wherein while the driving dire...