ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,559, issued on Sept. 1.
"Spiral vehicle box slide-out system" was invented by Xinfang Zhang (Springfield, Mo.) and Xiaopu Zhang (Springfield, Mo.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a spiral vehicle compartment slide-out system, which includes a spiral movement component, a drive device, support frame, and a bearing box. These components are integrally arranged inside the bearing boxes located on the lower part of the box on both sides. There is no need to disassemble the vehicle's chassis; instead, by simply fixing the support frame to the vehicle body, the slide-out compartment can be positioned at the...