Patent ID: 8671622

Claim:
A device for the at least partial closing of an opening of a room comprising a closing element which is placeable sealingly on an opening bottom and is guided vertically movable in guides, which are arranged vertically on both sides of the opening, between an open position in an upper area of the opening and a closed position on the opening bottom and which is connected to at least one counterweight, by means of which the closing element is held motionless in its particular position without an additional force acting on the closing element, wherein the closing element is coupled to at least one pneumatic drive unit or hydraulic drive unit for moving the closing element, whereby the drive unit is coupled to at least one driving power storage unit, wherein the at least one counterweight and the closing element are connected together by at least one cable, which is guided over a multiplier pulley block or over a power pulley block, wherein the at least one counterweight comprises first and second counterweights, the first counterweight being connected to the closing element independently of the second counterweight, the first counterweight being located on a first lateral side of the closing element and the second counterweight being located on a second lateral side of the closing element, wherein the first counterweight is connected to a first lateral side portion of the closing element and to a second lateral side portion of the closing element and wherein the second counterweight is connected to the first lateral side portion of the closing element and to the second lateral side portion of the closing element, wherein the at least one pneumatic drive unit or hydraulic drive unit comprises a first pneumatic drive unit or hydraulic drive unit connected to the first counterweight for driving the first counterweight independently of the second counterweight and a second pneumatic drive unit or hydraulic drive unit connected to the second counterweight for driving the second counterweight independently of the first counterweight, wherein the at least one driving power storage unit comprises at least one needle valve and a magnetic valve, wherein the first pneumatic drive unit or hydraulic drive unit comprises a first piston rod and the first pneumatic drive unit or hydraulic drive unit is connected to the first counter weight via the first piston rod, and wherein the second pneumatic drive unit or hydraulic drive unit comprises a second piston rod and the second pneumatic drive unit or hydraulic drive unit is connected to the second counter weight via the second piston rod, wherein the magnetic valve is configured to switch from a closed state, in which the closing element is held in an open position, to an open state, in which the closing element moves to a closed state, wherein the magnetic valve automatically switches to the open state in a case of a detected hazardous situation or in a case of a breakdown.