Patent ID: 7234720

Claim:
A trailer apparatus for a bleacher of the type having a lower framework supporting and interconnecting a plurality of generally parallel longitudinally extending bleacher seat assemblies, said framework including longitudinally spaced laterally extending base members, said trailer apparatus comprising: a torque tube rotatably attached for rotation on its axis to a lower part of the bleacher framework and above the base members to extend beneath and generally perpendicular to the seat assemblies; a torque arm rigidly attached to the torque tube; a first wheel assembly rotatably coupled to said torque arm on an axis of rotation parallel to the torque tube axis; an extendable lift mechanism coupled to said torque arm and operatively coupled at its other end to the framework; and, a lift mechanism operator for moving said lift mechanism between an extended position to rotate the torque tube on its axis in one direction to move said first wheel assembly to a lower trailering position with at least portions of said first wheel assembly below the base members and a retracted position to rotate the torque tube on its axis in the opposite direction to move said first wheel assembly to a raised position at least level with or above said base members.