ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,284, issued on April 15, was assigned to Cranemasters Inc. (North Chesterfield, Va.).
"Rail gear assembly" was invented by Thomas Dwyer (Richmond, Va.), Britt Calloway (Midlothian, Va.) and Barry Isringhausen (Providence Forge, Va.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rail gear assembly includes a base, a first wheel arm, and a second wheel arm. The first wheel arm may have a first end pivotally coupled to the base at a first arm connection and may have a second end rotatably connected to a first wheel by a first axle. The second wheel arm may have a first end pivotally coupled to the base at a second arm connection and a second end rotat...