US Patent Issued to SHANGHAI MING WEI HARDWARE on Feb. 24 for "Switching device for delayed unlocking function" (Chinese Inventor)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,987, issued on Feb. 24, was assigned to SHANGHAI MING WEI HARDWARE Co. LTD. (Shanghai).

"Switching device for delayed unlocking function" was invented by Jung-Chung Chen (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A switching device for delayed unlocking function, disposed at a flat-push type emergency door-lock device having a flat-push rod, including a switching-device base, a pushing swing arm, a linkage rod, a sensing assembly, a timing control assembly and an electromagnetic traction assembly. The pushing swing arm is disposed at the switching-device base and includes a stopper, being switchably maintained at an avoidance position ...