Patent ID: 7827919

Claim:
A multiple track railroad system for use with two adjacent sets of parallel continuous tracks with the tracks having a distance therebetween and each set of tracks including two continuous rails having a distance therebetween, said system comprising: an engine for pulling a train, including a set of wheels riding on at least two of the rails, said engine having a width equal to at least one set of said tracks; at least one rail car connected to and propelled by said engine, said rail car spanning and extending beyond the outer rails of both sets of tracks; at least four car-trucks supporting said rail car, with two of said car-trucks on each of said set of tracks, each car-truck including at least four wheels, with two wheels each riding on opposing rails of a set of the tracks; and trundle carrier assemblies, one each mounted to a bolster on each of the car-trucks with the upper end of said carrier assemblies being attached to said rail car to permit said car-trucks to move vertically or horizontally transverse on said tracks relative to said rail car to accommodate variations in the elevation or distance between the tracks, each of said trundle carrier assemblies includes a trundle body and a trundle stud pin inserted in and movable relative to said trundle body, and each of said trundle bodies includes a cavity open to a surface thereof, and further said trundle carrier assembly includes a lower trundle socket mounted to said bolster, and said trundle stud pin is attached to and extends from said lower trundle socket, and said trundle carrier assemblies each further including a mounting collar attached to said lower socket with fasteners, said mounting collar interconnected with and contacting a lower flange of said trundle body to secure said car trucks to said trundle bodies.