ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,100, issued on Jan. 27, was assigned to DAIDO METAL COMPANY LTD. (Nagoya, Japan).
"Half thrust bearing" was invented by Seiji Sano (Inuyama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a half thrust bearing for a crankshaft, a slide surface includes at least two oil grooves extending in a radial direction, pad surfaces located on both circumferential sides of each oil groove, a first inclined surface formed on a forward side of the oil groove in a rotation direction of the crankshaft, and a second inclined surface formed on a backward side of the oil groove in the rotation direction. Each of the first and second inclined surfaces has a c...