ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,292, issued on Oct. 28, was assigned to Sumitomo Riko Co. Ltd. (Aichi, Japan).
"Rubber bushing for railroad trucks" was invented by Shigehiro Otsubo (Aichi, Japan) and Satoru Ogawa (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Achieved is a rubber bushing for railroad trucks which has a novel structure and is capable of improving, for example, flame resistance to externally applied fire or the like without greatly degrading the basic properties demanded with respect to vibrational and load inputs. A rubber bushing 10 used for railroad car trucks comprises a shaft-like inner member 12 and an outer member 14, disposed on the outer perip...