A portable barricade includes a road plate, first and second support posts extending upward from end portions of the road plate, a barricade arm extending between the first and second support posts, and a lift coupled one of the end portions of the barricade arm and a corresponding one of the first and second support posts. Actuation of the lift is configured to slide the barricade arm relative to the first and second support members between a retracted position proximate to the road plate and a deployed position distal from the road plate.

A gravity powered garage door control opening and closing system that eliminates the conventional electric garage door opener and eliminates its two most common risks of failure, the first being a gear and/or bearing failure and the second being an electrical power failure. Other advantages include a reduction in electrical power needed and a reduction in cost over every other type of garage door opener. The present invention operates by transferring fluid between a counter weight and a storage tank under programmed control to control the movement and speed of the garage door as a function of its position in the door guides in which the door moves in.

An automatic auto-sensing flood protection roller shutter with auto-locating reinforced column includes a door plate composed of a plurality of door panels, at least one reinforced column automatically movable by a motor to a reinforcing position behind the door plate when the door plate is lowered upon sensing a flood, and a bolt and bolt driving device for securing the at least one reinforced column in the reinforcing position.

An automatic auto-sensing flood protection roller shutter with auto-locating reinforced column includes a door plate composed of a plurality of door panels, at least one reinforced column automatically movable by a motor to a reinforcing position behind the door plate when the door plate is lowered upon sensing a flood, and a bolt and bolt driving device for securing the at least one reinforced column in the reinforcing position.

An automatic auto-sensing flood protection roller shutter with auto-locating reinforced column includes a door plate composed of a plurality of door panels, at least one reinforced column automatically movable by a motor to a reinforcing position behind the door plate when the door plate is lowered upon sensing a flood, and a bolt and bolt driving device for securing the at least one reinforced column in the reinforcing position.

An automatic auto-sensing flood protection roller shutter with auto-locating reinforced column includes a door plate composed of a plurality of door panels, at least one reinforced column automatically movable by a motor to a reinforcing position behind the door plate when the door plate is lowered upon sensing a flood, and a bolt and bolt driving device for securing the at least one reinforced column in the reinforcing position.

A closure device for the vacuum-tight closure of an opening includes a closure element, at least one rod that projects out of a housing of the closure device and that, outside the housing, supports the closure element and that is rigidly connected to a carrier piece, a transmission unit which is adjustable by a drive parallel to the longitudinal adjustment direction between an initial, open position of the closure element, a middle position, in which the closure element assumes the intermediate position, and a closed, end position. At least one spring is arranged between the transmission unit on the carrier piece, and a stop device which, during adjustment of the transmission unit from the middle to the end position, blocks a further adjustment of the carrier piece parallel to the longitudinal adjustment direction. The transmission unit is guided by at least one longitudinal linear guide to be displaceable relative to the housing parallel to a longitudinal adjustment direction, and the carrier piece is guided by at least one oblique linear guide to be displaceable relative to the transmission unit parallel to an oblique adjustment direction.

A closure device for the vacuum-tight closure of an opening includes a closure element, at least one rod that projects out of a housing of the closure device and that, outside the housing, supports the closure element and that is rigidly connected to a carrier piece, a transmission unit which is adjustable by a drive parallel to the longitudinal adjustment direction between an initial, open position of the closure element, a middle position, in which the closure element assumes the intermediate position, and a closed, end position. At least one spring is arranged between the transmission unit on the carrier piece, and a stop device which, during adjustment of the transmission unit from the middle to the end position, blocks a further adjustment of the carrier piece parallel to the longitudinal adjustment direction. The transmission unit is guided by at least one longitudinal linear guide to be displaceable relative to the housing parallel to a longitudinal adjustment direction, and the carrier piece is guided by at least one oblique linear guide to be displaceable relative to the transmission unit parallel to an oblique adjustment direction.

An elevating-type shelter door enables operators to easily open and close in a short period of time, is highly water-tight, and has an excellent durability. A shelter door opens and closes an opening portion when a door body ascends and descends along a guide rail by means of an elevating device. The opening portion is provided on a ceiling of a shelter body. The shelter body is defines an interior space which serves as an evacuation space in an underground. A main body has a central convex portion which slidably fits to the opening portion along an inclination direction in which both the opening portion and the guide rail inclines. An elevating stand is slidably fixed to move along a rest column. The elevating stand is located above the opening portion when the door body is fully ascended and located in the interior space when the opening portion is closed.

A closure device for the vacuum-tight closure of an opening includes a closure element, at least one rod that projects out of a housing of the closure device and that, outside the housing, supports the closure element and that is rigidly connected to a carrier piece, a transmission unit which is adjustable by a drive parallel to the longitudinal adjustment direction between an initial, open position of the closure element, a middle position, in which the closure element assumes the intermediate position, and a closed, end position. At least one spring is arranged between the transmission unit on the carrier piece, and a stop device which, during adjustment of the transmission unit from the middle to the end position, blocks a further adjustment of the carrier piece parallel to the longitudinal adjustment direction. The transmission unit is guided by at least one longitudinal linear guide to be displaceable relative to the housing parallel to a longitudinal adjustment direction, and the carrier piece is guided by at least one oblique linear guide to be displaceable relative to the transmission unit parallel to an oblique adjustment direction.