US Patent Issued on May 12 for "Waterproofing structure for a wall pipe in an underground construction" (Chinese Inventor)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,624,774, issued on May 12.

"Waterproofing structure for a wall pipe in an underground construction" was invented by Zhaosheng Wu (Shenzhen City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A waterproofing structure for a wall pipe in an underground construction, which includes an extension pipe connected to a casting pipe of the wall pipe and extending out of the wall; a heat shrinkable pipe sleeved on the extension pipe and extending to an inner pipe of the wall pipe, wherein the heat shrinkable pipe is correspondingly and sealedly bonded to the extension pipe and the inner pipe; and an epoxy resin adhesive. A circumferential groove is provided...