ALEXANDRIA, Va., March 12 -- United States Patent no. 12,247,621, issued on March 11, was assigned to NTN Corp. (Osaka, Japan).
"Wheel bearing device" was invented by Kazunari Yamamoto (Iwata, Japan) and Hayato Taniguchi (Iwata, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A wheel bearing device (1) including: an outer member (2) on the inner periphery of which an outer-side rolling surface (2c/2d) is formed; an inner member (3) on the outer periphery of which an inner-side rolling surface (3c/3d) is formed; and a plurality of rolling bodies (41) interposed between the rolling surfaces (2c/2d/3c/3d) of the outer member (2) and the inner member (3). The wheel bearing device having a spline hole (3b) f...