ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,853, issued on Sept. 9, was assigned to JTEKT Corp. (Kariya, Japan).
"Differential gear" was invented by Kenji Kushizaki (Kariya, Japan), Nobuyuki Watanabe (Kariya, Japan) and Kenji Asami (Kariya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A differential gear includes a first connecting member with straight-spline protrusions on its inner periphery; a second connecting member with straight-spline protrusions on its inner periphery; a first side gear; and a second side gear. The first side gear includes a first cylindrical portion coupled to the first connecting member by helical splines, and a first wall portion extending radially inward....