The present invention relates to a pneumatic structure (10) comprising an inextensible body (12) defining at least a network of internal cavities (14), each cavity having a closed contour in at least one section of the cavity Each cavity being suitable for being pressurized so as to change the inextensible body from a rest configuration to at least one pressurized configuration, Inextensible body having, in each pressurized configuration, a macroscopic metric different from its macroscopic metric in the rest configuration, Each cavity being formed of at least two substantially rectilinear channels, each channel being fluidly connected to at least one of the other channels, the two said channels forming a heading change angle, Each cavity comprising at least one non-zero heading change angle, in particular at least three non-zero heading change angles.

A flexible and waterproof containment tube sits within a basin and prevents objects from entering the basin. When placed inside the basin, the containment tube is filled with a filling fluid. The dimensions of the containment tube are similar to that of the basin such that the containment tube fits within and fills substantially all of the basin. The outward hoop stress of the side portion against the walls of the basin evenly distribute pressure and protect the basin from damage, such as debris, rain or flood, water, or other objects.

A flexible and waterproof containment tube sits within a basin and prevents objects from entering the basin. When placed inside the basin, the containment tube is filled with a filling fluid. The dimensions of the containment tube are similar to that of the basin such that the containment tube fits within and fills substantially all of the basin. The outward hoop stress of the side portion against the walls of the basin evenly distribute pressure and protect the basin from damage, such as debris, rain or flood, water, or other objects.

A kind of partition wall is introduced. The partition wall includes a housing, a roller wound with an inflatable wall body mounted inside the housing, and a shaft with a torsion spring mounted inside the roller. The inflatable wall body can be pulled out from the housing and can be rolled back to the housing by the torsion spring. The partition wall is rollable which offers people the chance to adjust their room space segmentation. It is also suitable for some small space such as a recreational vehicle or some mobile house. When people need to divide a bedroom from living room, they can expand out the partition wall.

The present invention relates inflatable dome covers for above-ground recreational swimming pools. In particular, the present invention relates to mechanically pumping air into an inflatable dome cover for an above-ground recreational swimming pool. The air remains inside the dome cover, thus allowing the dome cover to maintain its shape and protect both the recreational swimming pool and the recreational swimmers. The inflatable dome cover can be either circular, square, or oval-shaped to fit the respective shape of the pools.

An inflatable pool cover device is provided. The device is designed to address common maintenance issues associated with traditional above-ground pool covers by incorporating a dome-shaped inflatable structure that prevents the accumulation of water, snow, and debris. The device comprises an inflatable body made of UV-resistant and cold-resistant material that inflates to fit securely beneath the pool's top perimeter lip and floats on the water surface, providing stability against displacement due to external forces. The dome's sloped design directs runoff toward its perimeter edges, while an inflatable rim reinforced for durability forms a continuous seal to prevent gaps. The device may include textured, non-slip grip enhancements and internal support ribs or frame members to reinforce structural integrity, particularly for larger pools. Features such as drainage spouts for manual water release, antimicrobial and anti-algae coatings, and heat-sealed seams further enhance the device's durability and functionality.