US Patent Issued to Sumitomo Riko on May 26 for "Double-tube heat exchanger and manufacturing method therefor" (Japanese Inventor)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,241, issued on May 26, was assigned to Sumitomo Riko Co. Ltd. (Aichi, Japan).

"Double-tube heat exchanger and manufacturing method therefor" was invented by Eiichi Daikai (Aichi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The double-tube heat exchanger has an outer tube and an inner tube inserted into the outer tube, is provided with an inside channel within the inner tube and an outside channel between the inner tube and the outer tube, and is configured to exchange heat between the fluid flowing in the inside channel and the fluid flowing in the outside channel. The inner tube has an uneven portion having unevenness on the outer periphera...