| 主权项 |
1. A jack system for selectively raising and lowering one or more elevated pipes or cable racks to and from a set position relative to a fixed support structure, the jack system comprising:
at least two elongate holding members, configured to operatively support from beneath and hold the one or more elevated pipes or cable racks in either a raised, or lowered, position above the fixed support structure thereby to permit access to a contact area defined between the fixed support structure and the one or more elevated pipes or cable racks; at least two opposing and spaced apart jacks adapted to function in identical fashion to assist in raising and lowering of the at least two elongate holding members relative to the fixed support structure, each jack comprising:
seating means, adapted to seat the at least two elongate holding members;at least two arms, located laterally outward relative to the fixed support structure, each arm including first and second extremities, the first extremity being operable to be brought into contact with the fixed support structure thereby to prop each jack against the fixed support structure, the second extremity being disposed at an angle relative to the first extremity and displaceable laterally towards and away from the fixed support structure; anda main movable body, connected to each of the at least two arms and configured to move the respective second extremities of the arms selectively laterally towards and away from the fixed support structure thereby to selectively raise and lower the respective seating means and consequently the at least two elongate holding members. |
