Patent ID: 9382670
Filing Date: 2016-07-05
CPC Classification: B61D,E01B,Y10T

Claim Text:
1. A guide box assembly for manipulating a rail on a rail loading and unloading machine, the guide box assembly comprising: a base roller on which a foot of a rail travels, the base roller having a rotational axis extending perpendicular to the length of the rail and being disposed on a base member; a pair of sidewalls disposed transverse to opposite ends of the base roller; a first roller assembly pivotably coupled to the sidewalls and extending from the sidewalls in a first direction parallel to the rail and including a first upper roller rotatably coupled to the first roller assembly, the first upper roller being pivotable about a first axis extending parallel to the rotational axis of the base roller to move the first upper roller toward or away from the base member; and a second roller assembly pivotably coupled to the sidewalls and extending in a direction opposite the first direction and including a second upper roller rotatably coupled to the second roller assembly, the second upper roller being spaced apart from the first upper roller along the length of the rail, the second roller assembly being pivotable about a second axis extending parallel to the rotational axis of the base roller to move the second upper roller toward or away from the base member, the first roller assembly and the second roller assembly being independently pivotable.