ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,247, issued on March 3, was assigned to KASGRO RAIL Corp. (New Castle, Pa.).
"Span bolster" was invented by Morgan Lottes (Lawrence, Kan.) and Edward Burris (Bazine, Kan.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for manufacturing a multiple axle railcar utilizing a non-stressed span bolster is disclosed. The span bolster supports the load of the railcar using camber to efficiently distribute the load from the railcar among the truck assemblies and axles. The manufacturing method discloses the fabrication and layout of a span bolster where non-stressed camber is incorporated into the structural elements of the span bolster. The camber ...