US Patent 9682643 Passenger seat

Described are passenger seat assemblies including spreaders (18) with a transitional region having a forward surface with a radius of curvature of about 3.5 to 3.7 inches and an aft surface with an angular profile configured so that the aft surface is located forward of a plane formed by a surface of the at least one seat back (12) in a fully upright position. The passenger seat assemblies also include leg assemblies (22 with a forward leg portion having a forward surface that is substantially aligned with a forward base frame tube, and an aft surface with an angular profile having a shape of an “r.”