ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,955, issued on Nov. 18, was assigned to NHK SPRING Co. LTD. (Yokohama, Japan).
"Coil spring device" was invented by Taisuke Suwa (Yokohama, Japan), Yuichi Shibata (Yokohama, Japan), Ippei Kokubun (Yokohama, Japan) and Tomoya Sugitani (Yokohama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coil spring device includes: a main body spring and an insulator, the insulator is provided with a support groove which extends around a coil axis and into which a lower end portion of the main body spring is fitted, the lower end portion of the main body spring adheres to an inner surface of the support groove, the inner surface of the support groove is ...