ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,089, issued on May 13, was assigned to WIELAND-WERKE AG (Ulm, Germany).
"Metal heat exchanger tube" was invented by Achim Gotterbarm (Dornstadt, Germany), Manfred Knab (Dornstadt, Germany) and Ronald Lutz (Blaubeuren, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A metal heat exchanger tube having integral fins formed on the tube outside and having a fin foot, fin flanks and a fin tip. The fin foot protrudes radially from the tube wall, and a channel is formed between the fins. Spaced-apart additional structures are arranged in a channel base and divide the channel between the fins into segments. The additional structures reduce the through...