ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,167, issued on Nov. 25, was assigned to PINWELD Ltd. (Calne, Great Britain).
"Polymeric pipe welding apparatus" was invented by Keven Chappell (Calne, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for welding polymeric pipes such as pipe segments in a pipeline welds first and second pipes around a circumferential weld zone and has one or more welding heads, a carriage for guiding the one or more welding heads around the circumferential weld zone and a drive arrangement for effecting relative rotation between the pipes and the or each welding head. The or each of the welding heads has a body and a heating element carried b...