US Patent Issued to NAVAC on March 31 for "Electric pipe expander" (Chinese Inventor)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,425, issued on March 31, was assigned to NAVAC INC. (Lyndhurst, N.J.).

"Electric pipe expander" was invented by Yourong Jiang (Zhejiang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electric pipe expander and intelligent control circuit for the electric pipe expander are provided. The electric pipe expander includes a pipe expander body and a mandrel sliding cavity disposed on the pipe expander body. A chuck body capable of clamping a pipe to be processed is disposed at an opening end of the mandrel sliding cavity. A mandrel is slidingly connected in the mandrel sliding cavity, an outer side end of the mandrel is provided with an oblique...