US Patent Issued to MA Aluminum on June 10 for "Inner spiral grooved tube with excellent heat transfer property and heat exchanger" (Japanese Inventors)

ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,304, issued on June 10, was assigned to MA Aluminum Corp. (Minato-ku, Japan).

"Inner spiral grooved tube with excellent heat transfer property and heat exchanger" was invented by Toshihiro Harata (Numazu, Japan), Masayuki Nakamoto (Fuji, Japan), Takuya Okawa (Numazu, Japan) and Yusuke Nakaura (Mishima, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An inner spiral grooved tube includes: a tube body; and grooves and fins aligned in an inner circumferential direction of the tube body, wherein the grooves and the fins are formed in a spiral along a longitudinal direction, an outer diameter is 3 mm or more and 10 mm or less, a number of the fins i...