ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,253, issued on April 21, was assigned to GKN Automotive Ltd. (Birmingham, Great Britain).
"Power transmission device for vehicle" was invented by Isao Hirota (Tochigi, Japan), Yousuke Kawai (Tochigi, Japan) and Toru Funane (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power transmission device is provided with a casing drivingly coupled to the power source to create a rotation about an axis, and a differential gear set supported by the casing to rotate with the casing about the axis. The differential gear set includes a pair of side gears capable of making a differential motion from each other, a friction section interposed betwe...