ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,047, issued on Dec. 23, was assigned to NSK-WARNER K.K. (Tokyo).
"Power transmission device" was invented by Nariaki Tamura (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power transmission device includes: a fixing member having a cylindrical surface; an output shaft having a facing surface facing the cylindrical surface; an input shaft having a pressing portion disposed between the cylindrical surface and the facing surface; and a pair of rolling elements. The facing surface includes a recessed surface. The recessed surface has a bottom surface and a pair of pressed surfaces. The bottom surface has a central surface and a pair o...