Patent ID: 7739959

Claim:
An over/under rail system for managing hydraulic lines and electric cables associated with longwall mining operations, comprising: stationary equipment, including an electrical power supply and a pump; a jumper hose connected to the pump; an upper rail attached to a roof of a mining area; at least one upper trolley adapted to be carried by said upper rail, said at least one upper trolley adapted to carry a hydraulic pipe said at least one upper trolley movable along said upper rail and said hydraulic pipe connected to said jumper hose; a lower rail supported by said at least one upper trolley; and a plurality of lower trolleys carried by said lower rail, one of said lower trolleys adapted to carry an electric cable connected to the electrical power supply, at least one of said lower trolleys movable along said lower rail, and one of said lower trolleys anchored to a fixed point where the electrical power supply is located.