ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,773, issued on Oct. 21.
"Wheel assembly" was invented by Haiyan Wang (Songzi, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A removable wheel assembly includes a mounting base, a caster assembly and a detachment mechanism. The mounting base is provided with an insertion hole and a transverse guide groove communicated with the insertion hole. The caster assembly includes an insertion shaft, a wheel bracket, a rotating wheel and a housing. The insertion shaft includes a first end portion, and the first end portion is provided with a first engagement portion. The wheel bracket is connected to the insertion shaft. The rotating wheel is mounted on...