ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,485,714, issued on Dec. 2.
"Coupling socket" was invented by Josef Scharmuller (Fornach, Austria), Josef Scharmuller Jr. (Vocklamarkt, Austria) and Christine Scharmuller (Fornach, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coupling socket for coupling to a coupling ball. The coupling socket has a concave coupling receiving area with a main insertion direction for the coupling ball, and a substantially semispherical lubricant cap with an end face edge is arranged in the coupling receiving area, wherein the convex exterior of the lubricant cap contacts the inner wall of the coupling receiving area over the surface thereof, and the concave int...