The solution is directed to a bleacher step access prevention system. The system is configured to be locked in place over a stairway of a retracted bleacher system in order to prevent climbing of the stairway when the bleacher system is in a retracted state. Certain embodiments are configured to accommodate handrails of the bleacher system so that handrails do not have to be removed from the stairwell when the bleacher system is in a retracted state.

The invention relates to a door assembly (1) for a sealed enclosure, said enclosure comprising a wall having a wall portion (20) defining at least one passage opening therein, said door assembly (1) comprising a flange (3) intended for being attached to the wall portion (20), characterized in that the flange (3) comprises two flange elements (3a, 3b) assembled together, one of the flange elements (3a) defining a ring inside the enclosure, the other flange element (3b) defining a ring outside the enclosure, and means for clamping at least one of the two flange elements (3a, 3b) against the wall portion (20).

The invention relates to a door assembly (1) for a sealed enclosure, said enclosure comprising a wall having a wall portion (20) defining at least one passage opening therein, said door assembly (1) comprising a flange (3) intended for being attached to the wall portion (20), characterized in that the flange (3) comprises two flange elements (3a, 3b) assembled together, one of the flange elements (3a) defining a ring inside the enclosure, the other flange element (3b) defining a ring outside the enclosure, and means for clamping at least one of the two flange elements (3a, 3b) against the wall portion (20).

The disclosure provided herein is directed to a window assembly that may be used for a hunting blind. The window assembly may have a frame gasket configured to go over a circumferential edge of a shell opening in a shell of the hunting blind. The window assembly may include a frame assembly with an exterior frame and interior frame matingly connect to one another thereby compressing the frame gasket to provide a seal without the use of fasteners or adhesive to connect to the frame assembly with the shell.

The disclosure provided herein is directed to a window assembly that may be used for a hunting blind. The window assembly may have a frame gasket configured to go over a circumferential edge of a shell opening in a shell of the hunting blind. The window assembly may include a frame assembly with an exterior frame and interior frame matingly connect to one another thereby compressing the frame gasket to provide a seal without the use of fasteners or adhesive to connect to the frame assembly with the shell.

To suppress downward radiation of electromagnetic waves from an antenna unit.

An antenna unit to be used by being installed so as to face a window glass for a building, the antenna unit comprising a plurality of array antennas, wherein each of the plurality of array antennas has a plurality of radiating elements and at least one conductor situated on an interior side relative to the plurality of radiating elements, and where the effective wavelength of the plurality of array antennas at the operation frequency is λ, and an integer of 0 or more is n, the distance from the center of the upper radiating element among the plurality of radiating elements to the upper edge of the conductor in the up-and-down direction is (0.5+n)λ±0.22λ, as seen in a plan view of the antenna unit.

According to one example, an audio door system includes a door, an audio system, an amplifier, and an exciter. The audio system is coupled to the door. The amplifier is coupled to the door, and is electrically coupled to the audio system. The exciter is coupled to the door, and is electrically coupled to the amplifier. The exciter can transform an audio electrical signal into mechanical energy, and can further cause a surface of the door to transform the mechanical energy into one or more acoustic sound waves.

A connector by way of which two frame elements of a frame of a furniture part can be connected, wherein the connector includes a corner-connecting mechanism for connecting respective end portions of the two frame elements in a corner region of the furniture-part frame. An attachment portion for attachment to a pivoting device is integrated on the corner-connecting mechanism, wherein the furniture part can be accommodated on a basic structure of a piece of furniture such that it can be pivoted by means of the pivoting device.

A refrigeration device has a first door with an opening and a second door for closing the opening in the first door. A first hinge member has a first connection portion fixed on a main body of the refrigeration device and a first hinged portion connected to the first door. A second hinge member has a second connection portion fixed on the first door and a second hinged portion connected to the second door. The second hinge member includes a columnar portion that is hinged to the first hinged portion. One of the columnar portion and the first hinged portion has a first shaft hole, and the other one has a first hinge shaft that extends into the first shaft hole. The novel device prevents a door body of the refrigeration device from being damaged at a hinged position and the reliability of the refrigeration device is improved.

A refrigeration device has a first door with an opening and a second door for closing the opening in the first door. A first hinge member has a first connection portion fixed on a main body of the refrigeration device and a first hinged portion connected to the first door. A second hinge member has a second connection portion fixed on the first door and a second hinged portion connected to the second door. The second hinge member includes a columnar portion that is hinged to the first hinged portion. One of the columnar portion and the first hinged portion has a first shaft hole, and the other one has a first hinge shaft that extends into the first shaft hole. The novel device prevents a door body of the refrigeration device from being damaged at a hinged position and the reliability of the refrigeration device is improved.